1. A solid-state image sensor comprising a pixel array having a plurality of pixels, and a plurality of signal processing circuits each of said plurality of signal processing circuits amplifying a signal output from said pixel array to a plurality of column signal lines, wherein
each of said plurality of signal processing circuits comprises
an operation amplifier which has an input terminal and an output terminal,
an input capacitance arranged between the input terminal and the column signal line, and
a feedback circuit which connects the input terminal with the output terminal, wherein
said feedback circuit is configured to form a feedback path in which a first capacitance element and a second capacitance element are arranged in series in a path connecting the input terminal to the output terminal, and a third capacitance element is arranged between a reference potential and a path connecting the first capacitance element to the second capacitance element.
2. The solid-state image sensor according to claim 1, wherein
said feedback circuit has an arrangement in which the first capacitance element and the second capacitance element are connected in series to connect the input terminal with the output terminal, and the third capacitance element is connected between a reference potential and a node connecting the first capacitance element to the second capacitance element.
3. The solid-state image sensor according to claim 1, wherein
the solid-state image sensor includes a first mode and a second mode as operation modes, and
said feedback circuit includes a plurality of switches, controlled to form the feedback path in the first mode and not to form the feedback path in the second mode.
4. The solid-state image sensor according to claim 1, wherein
said feedback circuit is configured to form the feedback path in response to a first control signal and to form, in response to a second control signal, a second feedback path connecting the input terminal to the output terminal via a capacitance element, and
an amplification factor of said signal processing circuit in forming the feedback path is different from that in forming the second feedback path.
5. The solid-state image sensor according to claim 1, wherein
each of said signal processing circuits includes
a first switch which connects the input terminal with one terminal of the first capacitance element,
a second switch which connects the output terminal with the other terminal of the first capacitance element,
a third switch which connects the input terminal with one terminal of the second capacitance element,
a fourth switch which connects the output terminal with the other terminal of the second capacitance element,
a fifth switch which connects the input terminal with one terminal of the third capacitance element,
a sixth switch which connects the output terminal with the other terminal of the third capacitance element,
a seventh switch which connects the other terminal of the first capacitance element with one terminal of the second capacitance element,
an eighth switch which connects the other terminal of the first capacitance element with the other terminal of the third capacitance element, and
a ninth switch which connects the one terminal of the third capacitance element with the reference potential.
6. The solid-state image sensor according to claim 5, wherein
the solid-state image sensor includes a first mode and a second mode as operation modes,
in the first mode, said first switch, said fourth switch, said seventh switch, said eighth switch, and said ninth switch are turned on, and
in the second mode, said second switch, said third switch, said fifth switch, and said sixth switch are turned on.
7. The solid-state image sensor according to claim 1, wherein
said operation amplifier is a fully-differential operation amplifier,
said feedback circuit forms the feedback path between an inverting input terminal and a non-inverting output terminal of said operation amplifier, and
each of said signal processing circuits further includes a second feedback circuit for forming a feedback path in which a fourth capacitance element and a fifth capacitance element are arranged in series between a non-inverting input terminal and an inverting output terminal of said operation amplifier in a path connecting the non-inverting input terminal to the inverting output terminal, and a sixth capacitance element is arranged between a reference potential and a path connecting the fourth capacitance element to the fifth capacitance element.
8. The solid-state image sensor according to claim 7, wherein
the reference potential is a common-mode potential of the fully-differential operation amplifier.
9. A camera comprising:
a solid-state image sensor according to claim 1; and
a processing unit which processes a signal output from said solid-state image sensor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A plug system for a fluid delivery catheter, the catheter having a distal portion and a proximal portion and at least one lumen in fluid communication therebetween, the catheter having an outer diameter in the range of about 0.01 to 0.041, and an inner diameter in the range of about 0.007 to 0.035, the plug system comprising a pierceable, self-sealable plug for engaging and sealing said proximal portion of the catheter in such a way that the maximum outer diameter of the plug does not exceed 140% of the outer diameter of said catheter.
2. The plug system of claim 1, wherein the plug is molded into the open end.
3. The plug system of claim 1, wherein the plug is pre-made and glued onto the open end.
4. The plug system of claim 1, wherein the catheter has an outer diameter in the range of about 0.01 to 0.021, and an inner diameter in the range of about 0.007 to 0.017.
5. The plug system of claim 1, further comprising an injection guide having an aperture for receiving the open end of the catheter, and a syringe having a needle for penetrating the plug and delivering an inflation fluid to the lumen, wherein the aperture of the injection guide is positioned surrounding the needle so that the injection guide will guide the needle to the plug.
6. A low profile fluid delivery and sealing system for a catheter with a lumen, comprising a pierceable and self-resealable member sealably coupled to the lumen at a proximal end of the catheter forming an assembly, wherein the transverse cross sectional area of the assembly as viewed along a longitudinal axis of the catheter does not exceed 150% of the original traverse cross sectional area of the catheter, and that the lumen is accessible through the member.
7. The system of claim 6, wherein the catheter has an outer diameter in the range of about 0.01 to 0.041, and an inner diameter in the range of about 0.007 to 0.035.
8. The system of claim 6, wherein the catheter has an open end at its very proximal end, the member has a cylindrical body and a flange extending from the periphery of the cylindrical body along a longitudinal axis of the cylindrical body, wherein the flange defines a space for receiving the open end of the catheter, and the thickness of the cylindrical solid body as measured along the longitudinal axis is large enough to provide a good sealing after a needle is inserted through and removed from the member.
9. The system of claim 8, wherein the thickness of the flange does not exceed 0.005.
10. The system of claim 6, wherein the catheter has an opening on its side wall near the proximal end, and the opening is covered and sealed by the member, wherein the member comprises a sealing membrane with a thickness less than 0.005.
11. The system of claim 10, further comprising an adaptor for guiding a needle to the opening, wherein the adaptor has a locking mechanism for holding and positioning the adaptor onto the catheter, and a guiding channel aligned with the opening for guiding the needle to the opening.
12. The system of claim 6, wherein the member comprises a tube connected to the catheter at its two ends and forms a portion of the catheter.
13. The system of claim 6, further comprising a syringe for injecting a predetermined amount of fluid into the catheter, wherein the syringe comprises:
an elongated cylinder forming a lumen and having a proximal end and a distal end, a finger stop formed about the proximal end and extending outwardly from the lumen, the distal end adapted to attach to a proximal portion of the catheter;
a plunger for use in the cylinder and having a shaft with a disk provided at a proximal end and a piston provided at a distal end of the shaft, the disk having a diameter larger than a diameter of the shaft, the piston having a diameter substantially the same as a diameter of the lumen of the cylinder;
a barrel provided proximal the finger stop at the proximal end of the cylinder, the barrel having a length and a longitudinal channel formed therethrough, the channel having a diameter sized to receive the shaft of the plunger; and
a tube provided at a proximal end of the lumen, the tube having an outer diameter less than the diameter of the lumen and an inner diameter forming a longitudinal channel, the inner diameter sized to receive the shaft of the plunger;
wherein the tube has a length for limiting the proximal travel of the plunger and thereby limiting a maximum volume of fluid that can be contained in the syringe, the barrel having a length for limiting the distal travel of the plunger and thereby limiting a maximum volume of fluid that can be expelled from the syringe.
14. The system of claim 13, further comprising an injection guide having an aperture for receiving the open end of the catheter, wherein the aperture of the injection guide is positioned surrounding the needle of the syringe so that the injection guide will guide the needle to the plug.
15. The system of claim 6, further comprising a dual syringe system for delivering fluid into the catheter or removing fluid therefrom, wherein the dual syringe system comprises:
a low volume syringe;
a large volume syringe;
a high pressure valve assembly;
a high pressure fluid conduit;
wherein said high pressure valve assembly is in fluid communication with said low volume syringe, said large volume syringe and said high pressure fluid conduct, and selectively allows fluid communication between;
a) said large volume syringe and said low volume syringe, or;
b) said low volume syringe and said high pressure fluid conduit, or;
c) said large volume syringe and said high pressure fluid conduit.
16. A method for inflatingdeflating a balloon on a guide catheter and exchanging a treatment catheter, the guide catheter having an opening connected to a lumen in fluid communication with the balloon, comprising the steps of:
a) providing an elastomeric member to seal the opening of the guide catheter;
b) providing a syringe with a needle;
c) inserting the needle into the lumen through the elastomeric member and the opening of the guide catheter so as to establish fluid communication between the lumen and the syringe;
d) injecting a fluid into the lumen to inflate the balloon;
e) removing the needle to allow the elastomeric member to self-seal so that the balloon is kept inflated;
f) advancing a treatment catheter to or removing a treatment catheter from a treatment site over the guide catheter.
17. The method of claim 16, wherein the treatment catheter has an inner diameter in the range of about 0.007-0.035.