1. A writing current circuit (42) adapted for supplying a controlled electrical current to a laser diode (34) included in a drive (10) that is adapted for swiftly recording a Digital Video Disc (\u201cDVD\u201d) (16), the writing current circuit (42) operating responsive both:
a. to write control digital data for controlling operation of the writing current circuit (42), the write control digital data including data which specifies an amount of electrical current which the writing current circuit (42) controllably supplies to the laser diode (34); and
b. to serial digital data which controls application of the electrical current to the laser diode (34) thereby specifying digital data to be recorded on the DVD (16),
both the write control digital data and the serial digital data being received from a control processor (14) included in the drive (10), the writing current circuit (42) comprising:
a plurality of separate current sources (62) each of which receives a single output signal from a current control register (58) included in the writing current circuit (42), the output signal respectively received by each current source (62) from the current control register (58):
a. when in a first state activating the receiving current source (62) for supplying a particular quantity of electrical current to the laser diode (34); and
b. when in a second state deactivating the receiving current source (62) for supplying the particular quantity of electrical current to the laser diode (34),
each current source (62), in addition to receiving the single output signal from the current control register (58), also receiving both:
a. a first current reference voltage signal which controls how much electrical current the current source (62) supplies to the laser diode (34) when the single output signal received by the current source (62) from the current control register (58) is in the first state; and
b. a second current reference voltage signal for controlling the charging electrical current supplied to the laser diode (34) by current source (62) when the single output signal received by the current source (62) from the current control register (58) initially enters the first state; and
a complementary voltage reference circuit which, responsive to write control digital data from the control processor (14), controls both the first current reference voltage signal and the second current reference voltage signal, the complementary voltage reference circuit in controlling the first current reference voltage signal and the second current reference voltage signal simulating electrical characteristics of the laser diode (34) for improving linearity between the write control digital data received from the control processor (14) and electrical current supplied to the laser diode (34).
2. The writing current circuit (42) of claim 1 wherein a single complementary voltage reference circuit supplies the first current reference voltage signal and the second current reference voltage signal to all current sources (62) included in the writing current circuit (42).
3. (canceled)
4. (canceled)
5. A method for operating a writing current circuit (42) that is adapted for supplying a controlled electrical current to a laser diode (34) included in a drive (10), the drive (10) being adapted for swiftly recording a DVD (16), the writing current circuit (42) operating responsive both:
a. to write control digital data for controlling operation of the writing current circuit (42), the write control digital data including data which specifies an amount of electrical current which the writing current circuit (42) controllably supplies to the laser diode (34); and
b. to serial digital data which controls application of the electrical current to the laser diode (34) thereby specifying digital data to be recorded on the DVD (16),
both the write control digital data and the serial digital data being received from a control processor (14) included in the drive (10), the method comprising the steps of:
providing a plurality of separate current sources (62), each current sources (62) receiving a single output signal from a current control register (58) included in the writing current circuit (42), the output signal respectively received by each current source (62) from the current control register (58):
a. when in a first state activating the receiving current source (62) for supplying a particular quantity of electrical current to the laser diode (34); and
b. when in a second state deactivating the receiving current source (62) for supplying the particular quantity of electrical current to the laser diode (34),
each current source (62), in addition to receiving the single output signal from the current control register (58), also receiving both:
a. a first current reference voltage signal which controls how much electrical current the current source (62) supplies to the laser diode (34) when the single output signal received by the current source (62) from the current control register (58) is in the first state; and
b. a second current reference voltage signal for controlling the charging electrical current supplied to the laser diode (34) by current source (62) when the single output signal received by the current source (62) from the current control register (58) initially enters the first state; and
providing a complementary voltage reference circuit which, responsive to write control digital data from the control processor (14), controls both the first current reference voltage signal and the second current reference voltage signal, the complementary voltage reference circuit in controlling the first current reference voltage signal and the second current reference voltage signal simulating electrical characteristics of the laser diode (34) for improving linearity between the write control digital data received from the control processor (14) and electrical current supplied to the laser diode (34).
6. The method of claim 5 wherein only a single complementary voltage reference circuit is provided for supplying the first current reference voltage signal and the second current reference voltage signal to all current sources (62) included in the writing current circuit (42).
7. (canceled)
8. (canceled)
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 receiver for a device of a telecommunications network, wherein the receiver being configured to receive a first signal attributable to a first carrier and a second signal attributable to a second carrier, the receiver comprising:
a first path searcher configured to detect taps in the first signal attributable to the first carrier;
a second path searcher configured to detect taps in the second signal attributable to the second carrier; and
a channel tap selector configured to select, based on received energy values for taps detected by the first path searcher and the second path searcher, which tap values are to be used for taps of the receiver for both the first carrier and the second carrier.
2. The receiver according to claim 1, wherein first and second carriers are continuous and adjacent carriers.
3. The receiver according to claim 1, wherein the channel tap selector is configured to select the highest received energy values for taps of the receiver for both the first carrier and the second carrier.
4. The receiver according to claim 1, wherein:
the first path searcher includes a first list of taps, wherein each tap of the first list of taps has a respective energy value;
the second path searcher includes a corresponding second list of taps, wherein each tap of the second list of taps has a corresponding respective energy value; and
the channel tap selector is configured to select the taps with the highest energy values over the two lists of taps detected separately on the first carrier and the second carrier, respectively, such that the energy value on the carrier having the highest energy value is selected for each tap.
5. The receiver according to claim 1, wherein the receiver is comprised in a network node.
6. The receiver according to claim 5, wherein the network node is a base station.
7. The receiver according to claim 1, wherein the receiver is comprised in a wireless terminal.
8. A method performed by a receiver for a device of a telecommunications network, wherein the receiver comprises comprising a first path searcher, a second path searcher, and a channel tap selector, the method comprising:
receiving by the receiver, a first signal attributable to a first carrier and a second signal attributable to a second carrier;
detecting, by the first path searcher, taps in the first signal attributable to the first carrier;
detecting, by the second path searcher, taps in the second signal attributable to the second carrier; and
selecting, by the channel tap selector, and based on received energy values for taps detected by the first path searcher and the second path searcher, which tap values are to be used for taps of the receiver for both the first carrier and the second carrier.
9. The method according to claim 8, wherein first and second carriers are continuous and adjacent carriers.
10. The method according to claim 8, further comprising:
selecting, by the channel tap selector, the highest received energy values for taps of the receiver for both the first carrier and the second carrier.
11. The method according to claim 8, wherein:
the first path searcher includes a first list of taps, wherein each tap of the first list of taps has a respective energy value; and
the second path searcher includes a corresponding second list of taps, wherein each tap of the second list of taps has a corresponding respective energy value; and
the method further comprises:
selecting, by the channel tap selector, the taps with the highest energy values over the two lists of taps detected separately on the first carrier and the second carrier, respectively, such that the energy value on the carrier having the highest energy value is selected for each tap.
12. The receiver according to claim 2, wherein the channel tap selector is configured to select the highest received energy values for taps of the receiver for both the first carrier and the second carrier.
13. The receiver according to claim 2, wherein:
the first path searcher includes a first list of taps, wherein each tap of the first list of taps has a respective energy value;
the second path searcher includes a corresponding second list of taps, wherein each tap of the second list of taps has a corresponding respective energy value; and
the channel tap selector is configured to select the taps with the highest energy values over the two lists of taps detected separately on the first carrier and the second carrier, respectively, such that the energy value on the carrier having the highest energy value is selected for each tap.
14. The receiver according to claim 3, wherein:
the first path searcher includes a first list of taps, wherein each tap of the first list of taps has a respective energy value;
the second path searcher includes a corresponding second list of taps, wherein each tap of the second list of taps has a corresponding respective energy value; and
the channel tap selector is configured to select the taps with the highest energy values over the two lists of taps detected separately on the first carrier and the second carrier, respectively, such that the energy value on the carrier having the highest energy value is selected for each tap.
15. The receiver according to claim 14, wherein the receiver is comprised in a network node.
16. The receiver according to claim 14, wherein the receiver is comprised in a wireless terminal.
17. The receiver according to claim 2, wherein the receiver is comprised in a network node.
18. The method according to claim 8, further comprising:
selecting, by the channel tap selector, the highest received energy values for taps of the receiver for both the first carrier and the second carrier.
19. The method according to claim 9, wherein:
the first path searcher includes a first list of taps, wherein each tap of the first list of taps has a respective energy value; and
the second path searcher includes a corresponding second list of taps, wherein each tap of the second list of taps has a corresponding respective energy value; and
the method further comprises:
selecting, by the channel tap selector, the taps with the highest energy values over the two lists of taps detected separately on the first carrier and the second carrier, respectively, such that the energy value on the carrier having the highest energy value is selected for each tap.
20. The method according to claim 10, wherein:
the first path searcher includes a first list of taps, wherein each tap of the first list of taps has a respective energy value; and
the second path searcher includes a corresponding second list of taps, wherein each tap of the second list of taps has a corresponding respective energy value; and
the method further comprises:
selecting, by the channel tap selector, the taps with the highest energy values over the two lists of taps detected separately on the first carrier and the second carrier, respectively, such that the energy value on the carrier having the highest energy value is selected for each tap.