Author: claimsbot

1. A motor control device comprising:
a following control unit that calculates a pre-correction torque command based on a difference between an operation command signal for commanding an operation of a motor and a detection signal that is a result of detecting an operation of the motor;
an adder that outputs a post-correction torque command by adding the pre-correction torque command to a correction torque command; and
an electric-current control unit that outputs a drive current for driving the motor based on the post-correction torque command, wherein
the motor control device executes control so that the detection signal matches the operation command signal, and wherein
the motor control device further comprises:
a reference-periodic-signal computation unit that calculates, based on the detection signal, a reference periodic signal with a period that is same as that of a torque ripple caused by the motor and that is dependent on a position of the motor
an amplitudephase estimation unit that sequentially estimates an amplitude of the post-correction torque command and a phase of the post-correction torque command relative to the reference periodic signal based on the reference periodic signal and the post-correction torque command that is an output from the adder, and
a correction-torque computation unit that sequentially updates the correction torque command input to the adder so that a difference between the correction torque command input to the adder and the post-correction torque command output from the adder becomes small, by using an amplitude and a phase of the post-correction torque command that are estimated by the amplitudephase estimation unit.
2. The motor control device according to claim 1, wherein the amplitudephase estimation unit sequentially estimates an amplitude of the post-correction torque command and a phase of the post-correction torque command relative to the reference periodic signal based on a signal obtained by sequentially multiplying a periodic signal generated based on the reference periodic signal and the post-correction torque command that is an output from the adder.
3. The motor control device according to claim 1, further comprising a correction-torque determination unit that determines whether an amplitude of the correction torque command updated by the correction-torque computation unit is equal to or larger than a predetermined threshold, wherein
when the amplitude of the correction torque command is equal to or larger than the threshold, the correction-torque computation unit stops updating the correction torque command, and the adder does not add the correction torque command to the pre-correction torque command.
4. The motor control device according to claim 1, further comprising an estimating-operation determination unit that determines, based on a gain value set for the following control unit to calculate the pre-correction torque command and on a frequency of the torque ripple obtained from the detection signal, whether the frequency is within a control band, wherein
when the frequency exceeds the control band, the correction-torque computation unit does not update the correction torque command.
5. A motor control device comprising:
a following control unit that calculates a pre-correction torque command based on a difference between an operation command signal for commanding an operation of a motor and a detection signal that is a result of detecting an operation of the motor;
an adder that outputs a post-correction torque command by adding the pre-correction torque command to a correction torque command; and
an electric-current control unit that outputs a drive current for driving the motor based on the post-correction torque command, wherein
the motor control device executes control so that the detection signal matches the operation command signal, and wherein
the motor control device further comprises:
a reference-periodic-signal computation unit that calculates, based on the detection signal, a reference periodic signal with a period that is same as that of a torque ripple caused by the motor and that is dependent on a position of the motor;
an amplitudephase estimation unit that sequentially estimates an amplitude of the pre-correction torque command and a phase of the pre-correction torque command relative to the reference periodic signal based on the reference periodic signal and the pre-correction torque command that is an output from the following control unit; and
a correction-torque computation unit that sequentially updates the correction torque command input to the adder so that a difference between the correction torque command input to the adder and the post-correction torque command output from the adder becomes small, by using an amplitude and a phase of the pre-correction torque command that are estimated by the amplitudephase estimation unit.
6. The motor control device according to claim 5, further comprising a correction-torque determination unit that determines whether an amplitude of the correction torque command updated by the correction-torque computation unit is equal to or larger than a predetermined threshold, wherein
when the amplitude of the correction torque command is equal to or larger than the threshold, the correction-torque computation unit stops updating the correction torque command, and the adder does not add the correction torque command to the pre-correction torque command.
7. The motor control device according to claim 5, further comprising an estimating-operation determination unit that determines, based on a gain value set for the following control unit to calculate the pre-correction torque command and on a frequency of the torque ripple obtained from the detection signal, whether the frequency is within a control band, wherein
when the frequency exceeds the control band, the correction-torque computation unit does not update the correction torque command.
8. The motor control device according to claim 5, wherein the amplitudephase estimation unit estimates an amplitude of the pre-correction torque command and a phase of the pre-correction torque command relative to the reference periodic signal based on a signal obtained by sequentially multiplying a periodic signal generated based on the reference periodic signal and the pre-correction torque command that is an output from the following control unit.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A cellular network comprising: a plurality of mobile stations; and a plurality of cells each comprising a base station configured to provide communication services to ones of the plurality of mobile stations over four channels within a service area divided into three sectors, the four channels comprising a first pair of channels and a second pair of channels, each of the four channels comprising a band of contiguous frequencies, wherein the band of contiguous frequencies of the first pair of channels do not have overlapping portions,
the band of contiguous frequencies of the second pair of channels have overlapping portions,
the base station is configured to provide communication services within a first of the three sectors using one of the channels of the first pair of channels,
the base station is further configured to provide communication services within a second of the three sectors using the other of the channels of the first pair of channels,
the base station is further configured to provide communication services within a third of the three sectors using one of the channels of second pair of channels, and
the base station is further configured to provide communication services within at least one of the first, second, and third of the three sectors using the other of the channels of second pair of channels.
2. The cellular network of claim 1, further comprising: a load detection processor configured to detect that an amount of communication services provided by the base stations of the plurality of cells in one or more of the three sectors exceeds a threshold value, and in response to detecting the amount of communication services provided in one or more of the three sectors exceeds the threshold value, provide communication services within the at least one of the first, second, and third of the three sectors using the other of the channels of second pair of channels.
3. A cellular network comprising,
a plurality of mobile stations;
and a plurality of cells each comprising a base station configured to provide communication services to ones of the plurality of mobile stations over four channels within a service area divided into four sectors, the four channels comprising a first pair of channels and a second pair of channels, each of the four channels comprising a band of contiguous frequencies,
wherein the band of contiguous frequencies of both the first and second pairs of channels have overlapping portions,
the base station is configured to provide communication services within each of the four sectors using a different one of the four channels,
each of one or more sectors of a portion of the plurality of cells is located adjacent to a different sector of a different cell of the plurality of cells,
and the base stations of the portion of the plurality of cells are configured to use a channel of the four channels in each of the one or more sectors that is different from the channel used in the adjacent different sector of the different cell.
4. The cellular network of claim 3, wherein the service area of each of the cells is substantially square shaped, and each of the sectors is substantially triangle shaped.
5. The cellular network of claim 3, wherein for each of the one or more of the four sectors of the portion of the plurality of cells, the band of contiguous frequencies of the channel used in the sector does not overlap the band of contiguous frequencies of the channel used in the adjacent different sector of the different cell.
6. The cellular network of claim 3, wherein each of the base stations of the plurality of cells comprises an OFDM transceiver for each of the four sector of the service area, and each transceiver is configured to use one of the four channels to communicate with ones of the plurality of remote units located within the sector.
7. The cellular network of claim 3, wherein the four channels each comprise a portion of an Educational Broadband Service (EBS)Broadcast Radio Services (BRS) band, the first pair of channels are adjacent channels in the EBSBRS band, the second pair of channels are adjacent channels in the EBSBRS band, and the first pair of channels are adjacent to the second pair of channels in the EBSBRS band.
8. The cellular network of claim 3, wherein the four channels each comprise a portion of an Educational Broadband Service (EBS)Broadcast Radio Services (BRS) band, the first pair of channels are adjacent channels in the EBSBRS band, the second pair of channels are adjacent channels in the EBSBRS band, and the first pair of channels are not adjacent to the second pair of channels in the EBSBRS band.
9. The cellular network of claim 3, wherein each of the four channels includes an occupied portion used for data communication flanked by a pair of unused guard bands,
the overlapping portion of each of the first and second pairs of channels includes one of the pair of unused guard bands of each of the channels of the pair of channels.
10. The cellular network of claim 9, wherein the band of contiguous frequencies of each of the four channels has a bandwidth of 10 MHz comprising 1024 subcarriers, each of the pair of unused guard bands comprising 94 subcarriers and the occupied portion comprising 840 subcarriers.
11. The cellular network of claim 9, wherein the band of contiguous frequencies of each of the four channels has a bandwidth of 5 MHz comprising 512 subcarriers, each of the pair of unused guard bands comprising 46 subcarriers and the occupied portion comprising 466 subcarriers.
12. A cellular network to provide communication services to a plurality of mobile stations over four channels, the four channels comprising a first pair of channels and a second pair of channels, each of the first and second pairs of channels having an overlapping portion, the cellular network comprising:
a plurality of substantially square shaped cells each comprising four sectors and a base station configured to provide communication services to ones of the plurality of mobile stations located within the four sectors, the base station being configured to use a different one of four channels within each of the four sectors, the sectors in which the channels of the first pair of the channels are used being nonadjacent to one another,
wherein each of one or more of the four sectors of a portion of the plurality of cells is located adjacent to a different sector of a different cell of the plurality of cells, and
the base stations of the portion of the plurality of cells are configured to use channels of the four channels in each of the one or more sectors that is different from the channel used in the adjacent different sector of the different cell.
13. The cellular network of claim 12, wherein each of the base stations of the plurality of cells comprises an orthogonal frequency division multiplexing (OFDM) transceiver for each sector of the service area, and
each transceiver is configured to use one of the four channels to communicate with the ones of the plurality of remote units located within the sector.
14. The cellular network of claim 13, wherein the OFDM transceiver is configured to provide communication services using a horizontal beam-width antenna pattern having an angle ranging from approximately 50\xb0 to approximately 70\xb0.
15. The cellular network of claim 13, wherein the OFDM transceiver is configured to provide communication services using a horizontal beam-width antenna pattern having an angle ranging from approximately 80\xb0 to approximately 110\xb0.
16. A method comprising: for use with a single cell within a cellular network, the cell comprising a base station configured to provide communication services to mobile stations within a service area divided into three sectors, the method comprising:
selecting a pair of overlapping channels;
selecting a pair of channels;
configuring the base station to provide communication services within a first sector of the three sectors using a first one of the channels of the pair of non-overlapping channels,
configuring the base station to provide communication services within a second sector of the three sectors using a second one of the channels of the pair of non-overlapping channels; and
configuring the base station to provide communication services within a third sector of the three sectors using a first one of the channels of the pair of overlapping channels, and
configuring the base station to provide communication services within at least one of the first sector, the second sector, and the third sector using a second one of the channels of the pair of overlapping channels.
17. The method of claim 16, wherein selecting the pair of overlapping channels comprises:
allocating a pair of channels within a first portion of an Educational Broadband ServiceBroadcast Radio Services band having a predetermined bandwidth, each of the pair of channels having an identical allocated bandwidth, the total bandwidth of the allocated channels exceeding the predetermined bandwidth.
18. The method of claim 17, wherein selecting the pair of non-overlapping channels comprises:
allocating a pair of channels within a second portion of an Educational Broadband ServiceBroadcast Radio Services band.
19. The method of claim 18, wherein the first portion of the Educational Broadband ServiceBroadcast Radio Services band is adjacent the second portion of the Educational Broadband ServiceBroadcast Radio Services band.
20. A method of determining a layout for a plurality of cells of a cellular network, each of the plurality of cells being generally square shaped and divided along its diagonals into four sectors comprising two pairs of opposing sectors, each of the plurality of cells comprising a base station configured to provide communication services to mobile stations located within the four sectors, the method comprising:
selecting a first cell of the plurality of cells of a cellular network;
assigning a first pair of overlapping channels one each to the sectors of a first of the pairs of opposing sectors of the first cell;
assigning a second pair of overlapping channels one each to the sectors of a second of the pairs of opposing sectors of the first cell;
for each of the four sectors of the first cell, configuring the base station of the first cell to use the channels assigned to the sector to provide communication services to ones of the mobile stations located within the sector,
selecting a second cell adjacent to the first cell;
assigning the first pair of overlapping channels one each to the second of the pairs of opposing sectors of the second cell; and
assigning the second pair of overlapping channels one each to the sectors of the first of the pairs of opposing sectors of the second cell, and
for each of the four sectors of the second cell, configuring the base station of the second cell to use the channels assigned to the sector to provide communication services to ones of the mobile stations located within the sector.
21. The method of claim 20, wherein a first cell layout is defined by the assignment of the first pair of overlapping channels to the first of the pairs of opposing sectors of the first cell and the assignment of the second pair of overlapping channels to the second of the pairs of opposing sectors of the first cell, the method further comprising:
defining a rotated cell layout by rotating the first cell layout,
wherein the assigning of the first pair of overlapping channels one each to the second of the pairs of opposing sectors of the second cell comprises assigning the first pair of overlapping channels to the same sectors in which they are assigned in the rotated cell layout, and
wherein the assigning of the second pair of overlapping channels one each to the first of the pairs of opposing sectors of the second cell comprises assigning the second pair of overlapping channels to the same sectors in which they are assigned in the rotated cell layout.
22. The method of claim 21, wherein rotating the first cell layout comprises rotating the first cell ninety degrees.
23. The method of claim 21, wherein rotating the first cell layout comprises rotating the first cell one hundred and eighty degrees about one of its diagonals.
24. A cellular network comprising:
a plurality of substantially square cells each divided along its diagonals into four sectors comprising two pairs of opposing sectors, each of the plurality of cells comprising a base station configured to provide communication services to mobile stations within the four sectors;
a cell plan having an alternating pattern in which a first cell layout is flanked on all four of its sides, but not along its diagonal, by a rotated cell layout and the rotated cell layout is flanked on all four of its sides, but not along its diagonal, by the first cell layout, the first cell layout having one of four channels assigned to each of its four sectors, each of the four channels comprising a band of contiguous frequencies, a first pair of the four channels having overlapping portions, a second pair of the four channels having overlapping portions, the first pair of channels having being assigned to a first of the pairs of opposing sectors, the second pair of channels being assigned to a second of the pairs of opposing sectors.
25. The cellular network of claim 24, wherein the rotated cell layout is identical to the first cell layout rotated ninety degrees.
26. The cellular network of claim 24, wherein the rotated cell layout is identical to the first cell layout rotated one hundred and eighty degrees about one of its diagonals.
27. The cellular network of claim 1, wherein the four channels each comprise a portion of an Educational Broadband Service (EBS)Broadcast Radio Services (BRS) band,
the first pair of channels are adjacent channels in the EBSBRS band,
the second pair of channels are adjacent channels in the EBSBRS band, and
the first pair of channels are adjacent to the second pair of channels in the EBSBRS band.
28. The cellular network of claim 1, wherein the four channels each comprise a portion of an Educational Broadband Service (EBS)Broadcast Radio Services (BRS) band,
the first pair of channels are adjacent channels in the EBSBRS band,
the second pair of channels are adjacent channels in the EBSBRS band, and
the first pair of channels are not adjacent to the second pair of channels in the EBSBRS band.
29. The cellular network of claim 1, wherein each of the four channels includes an occupied portion used for data communication flanked by a pair of unused guard bands, and
the overlapping portion of the second pair of channels includes one of the pair of unused guard bands of each of the channels of the second pair of channels.
30. The cellular network of claim 29, wherein the band of contiguous frequencies of each of the four channels has a bandwidth of 10 MHz comprising 1024 subcarriers, each of the pair of unused guard bands comprising 94 subcarriers and the occupied portion comprising 840 subcarriers.
31. The cellular network of claim 29, wherein the band of contiguous frequencies of each of the four channels has a bandwidth of 5 MHz comprising 512 subcarriers, each of the pair of unused guard bands comprising 46 subcarriers and the occupied portion comprising 466 subcarriers.

1. A method of cloning a master system, the method comprising:
enabling an image of the master system, that includes a non-writable file partition, to automatically self-create an overlay that receives writes directed to the file partition, where the non-writable file partition comprises an operating system.
2. A method according to claim 1, wherein the image comprises code to automatically create the overlay based on the absence of an overlay partition in the image.
3. A method according to claim 1, wherein the image is configured to perform the automatic self-creating when the image is booted.
4. A method according to claim 3, wherein the image comprises a flag that indicates that the overlay has not been created, and wherein the automatic self-creating occurs in response to recognition of the flag when the image is booted.
5. A method according to claim 1, wherein the operating system is an embedded operating system.
6. A method according to claim 5, wherein the embedded operating system is a Microsoft Windows embedded operating system.
7. A method according to claim 1, wherein the operating system comprises a file system module that makes the non-writable file partition available as a writable file system, and where the overlay and embedded write filter function together in the operating system as a layer between the file system module and one or more storage media that store the data of the non-writable file partition and the data of the overlay, whereby the combined data so stored is transparently made available through the file system module as the writable file system.
8. A method according to claim 7, wherein the image comprises a flag that indicates that the overlay has not been created, and wherein the automatic self-creating occurs in response to recognition of the flag when the image is booted.
9. A method according to claim 7, wherein the file system module implements a standard file system type, and wherein the overlay has a nonstandard file system type.
10. A method according to claim 9, wherein the overlay’s nonstandard file system type renders it unrecognizable by cloning tools that can recognize and clone the standard file system type.
11. A machine readable storage storing the image according to claim 1.
12. A method of cloning a master system configured with a non-writable volume or partition comprising an operating system, where the master system is configured to provide an overlay to store updates directed to the non-writable volume or partition, the method comprising:
configuring a flag in the master system with a setting, where the configured flag is for indicating that the overlay is needed and has not been provided;
after configuring the flag, creating a master image of the master system, where the master image includes the configured flag; and
creating a clone of the master system on a storage of another system based on the master image.
13. A method according to claim 12, further comprising automatically providing the clone of the master system with an overlay based on the setting of the flag in the clone of the master system, where the overlay provides file-system level write functionality to the non-writable volume or partition of the clone system.
14. The storage according to claim 13, the storage storing the clone of the master system that was automatically provided with the overlay.
15. The storage according to claim 12, the storage storing the clone of the master system.
16. A method, comprising:
building an operating system install comprising operating system files on a target drive, where the operating system install is configured to have an overlay providing write capability to a non-writable partition; then
performing a first boot of the target drive;
disabling the overlay; and
configuring the operating system install to have both a resealed or logical first-boot state and to indicate that the overlay is needed and has not been initialized.
17. A method according to claim 16, further comprising creating a condensed image of the operating system using an imaging tool, where the condensed image is capable of being installed on disk drives with different sizes or configurations.
18. A storage storing a condensed system image comprising an operating system, where the condensed system image is capable of being exploded to install the operating system on disk drives with different sizes or configurations, and where the operating system is enabled to self-create an overlay partition and write filter when booted.
19. An apparatus for cloning a master system configured with a non-writable volume or partition comprising an operating system, where the master system is configured to provide an overlay to store updates directed to the non-writable volume or partition, the apparatus comprising:
a flag in the master system configured with a setting, where the configured flag is for indicating that the overlay is needed and has not been provided;
a master image of the master system, created after the flag is configured, where the master image includes the configured flag; and
a clone of the master system created on a storage of another system based on the master image.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A readout circuit comprising:
an amplifier;
an input capacitor configured to input a signal by capacitive coupling to an input terminal of the amplifier;
an initializing switch configured to short circuit between the input terminal and an output terminal of the amplifier;
a feedback capacitor arranged between the input terminal and the output terminal of the amplifier; and
an offset controller configured to set an output offset voltage of the amplifier, wherein
the readout circuit operates in first and second modes,
in the first mode, a first voltage is input to the amplifier through the input capacitor, and thereafter a second voltage lower than the first voltage is input to the amplifier through the input capacitor,
in the second mode, a third voltage is input to the amplifier through the input capacitor, and thereafter a fourth voltage higher than the third voltage is input to the amplifier through the input capacitor, and
in at least one of the first mode and the second mode, after the initializing switch is turned on, the offset controller applies the output offset voltage to the output terminal of the amplifier, whereby the output offset voltage of the amplifier is set to different values between the first and second modes.
2. The readout circuit according to claim 1, wherein
the input capacitor, the initializing switch and the feedback capacitor constitute a clamping unit configured to clamp the first voltage in the first mode, and to clamp the third voltage in the second mode.
3. The readout circuit according to claim 1, wherein
the amplifier is a differential amplifier or a common source type amplifier.
4. The readout circuit according to claim 1, wherein
in the first mode, after the initializing switch is turned on, the first voltage is input to the input capacitor to clamp the first voltage, and
in the second mode, after the initializing switch is turned on, the third voltage is input to the input capacitor to clamp the third voltage.
5. The readout circuit according to claim 1, wherein
the offset controller controls so that a transition period of a control signal for switching from on to off of the initializing switch in the first mode is different from a transition period of the control signal for switching from on to off of the initializing switch in the second mode, whereby the output offset voltage of the amplifier is set to the different values between the first and second modes.
6. The readout circuit according to claim 1, wherein
the amplifier is a differential amplifier, and
a reference voltage input to the differential amplifier in the first mode is different from a reference voltage input to the differential amplifier in the second mode.
7. The readout circuit according to claim 1, wherein
a plurality of the initializing switches are provided, and
the offset controller controls so that a number of the initializing switches turned on in the first mode is different from a number of the initializing switches turned on in the second mode, whereby the output offset voltage of the amplifier is set to the different values between the first and second modes.
8. The readout circuit according to claim 1, wherein
the offset controller applies different offset voltages to a node on an electrical path between the feedback capacitor and the output terminal of the amplifier in an on state of the initializing switch in the first mode and in an on state of the initializing switch in the second mode, whereby the output offset voltage of the amplifier is set to the different values between the first and second modes.
9. The readout circuit according to claim 1, further comprising a second capacitor including a first terminal connected to the input terminal of the amplifier and a second terminal connected to the offset controller, wherein
the offset controller applies different voltages to the second terminal of the second capacitor between the first and second modes, whereby the output offset voltage of the amplifier is set to different values between the first and second modes.
10. The solid-state imaging device according to claim 9, wherein
in the first mode, a photo signal from the pixel is input to the first input terminal as the first voltage, and a pixel reset signal from the pixel is input to the first input terminal as the second voltage, and
in the second mode, a pixel reset signal from the pixel is input to the first input terminal as the third voltage, and a photo signal from the pixel is input to the first input terminal as the fourth voltage.
11. A solid-state imaging apparatus comprising:
a readout circuit including:
an amplifier;
an input capacitor configured to input a signal by capacitive coupling to an input terminal of the amplifier;
an initializing switch configured to short circuit between the input terminal and an output terminal of the amplifier;
a feedback capacitor arranged between the input terminal and the output terminal of the amplifier; and
an offset controller configured to set an output offset voltage of the amplifier, wherein
the readout circuit operates in first and second modes,
in the first mode, a first voltage is input to the amplifier through the input capacitor, and thereafter a second voltage lower than the first voltage is input to the amplifier through the input capacitor,
in the second mode, a third voltage is input to the amplifier through the input capacitor, and thereafter a fourth voltage higher than the third voltage is input to the amplifier through the input capacitor, and
in at least one of the first mode and the second mode, after the initializing switch is turned on, the offset controller applies the output offset voltage to the output terminal of the amplifier, whereby the output offset voltage of the amplifier is set to different values between the first and second modes; and
a pixel configured to generate a signal by a photoelectric conversion, wherein
the signal generated by the pixel is input to the readout circuit.
12. The solid-state imaging apparatus according to claim 11, further comprising:
an output amplifier configured
to output, in the first mode, a difference between an output voltage from the amplifier at a time of inputting the first voltage and an output voltage from the amplifier at a time of inputting the second voltage, and
to output, in the second mode, a difference between an output voltage from the amplifier at a time of inputting the third voltage and an output voltage from the amplifier at a time of inputting the fourth voltage.
13. A method of driving a readout circuit comprising an amplifier, an input capacitor configured to input a signal by capacitive coupling to an input terminal of the amplifier, an initializing switch configured to short circuit between the input terminal and an output terminal of the amplifier, a feedback capacitor arranged between the input terminal and the output terminal of the amplifier, and an offset controller configured to set an output offset voltage of the amplifier; wherein the method comprises:
operating the readout circuit in first and second modes;
in the first mode, inputting, to the amplifier through the input capacitor, a first voltage, and thereafter inputting a second voltage lower than the first voltage through the input capacitor;
in the second mode, inputting, to the amplifier through the input capacitor, a third voltage, and thereafter inputting a fourth voltage higher than the third voltage through the input capacitor, and
in at least one of the first mode and the second mode, after turning on the initializing switch, applying the output offset voltage to the output terminal of the amplifier by the offset controller, whereby the output offset voltage of the amplifier is set to different values between the first and second modes.
14. The method according to claim 13, wherein
the input capacitor, the initializing switch and the feedback capacitor constitute a clamping unit configured to clamp the first voltage in the first mode, and to clamp the third voltage in the second mode.
15. A solid-state imaging device comprising:
an amplifier including a first input terminal to which a signal from a pixel is input and a second input terminal to which a reference voltage is input;
an input capacitor configured to input the signal by capacitive coupling to the first input terminal of the amplifier;
an initializing switch configured to short circuit between the first input terminal and an output terminal of the amplifier;
a feedback capacitor arranged between the first input terminal and the output terminal of the amplifier; and
a switching unit configured to switch the reference voltage input to the second input terminal of the amplifier, wherein
the solid-state imagine device operates in first and second modes, and wherein
in the first mode a first voltage is input to the first input terminal through the input capacitor, and thereafter a second voltage lower than the first voltage is input to the first input terminal through the input capacitor;
in the second mode a third voltage is input to the first input terminal through the input capacitor, and thereafter a fourth voltage higher than the third voltage is input to the first input terminal through the input capacitor,
the switching unit switches the reference voltage input to the second input terminal between the first mode and the second mode, and
in at least one of the first mode and the second mode, after the initializing switch is turned on, the output offset voltage is applied to the output terminal of the amplifier, whereby the output offset voltage of the amplifier is set to different values between the first and second modes.