Optical link bandwidth improvement
An optical receiver system includes an amplifier circuit and a compensation circuit. The amplifier circuit includes a light detector, and a transimpedance amplifier. The transimpedance amplifier produces an amplified signal. The compensation circuit includes at least one pole compensation stage that performs pole compensation on the amplified signal.
1 . An optical receiver system comprising:
an amplifier circuit, the amplifier circuit including:
a light detector,
a transimpedance amplifier, and
an output on which is placed an amplified signal; and,
a pole compensation circuit connected to the output of the amplifier circuit, the pole compensation circuit comprising:
a first pole compensation stage that performs pole compensation on the amplified signal for a first pole.
2 . An optical receiver system as in claim 1 wherein the compensation circuit additionally comprises:
a second pole compensation stage connected in series with the first pole compensation stage.
3 . An optical receiver system as in claim 1 wherein the compensation circuit additionally comprises a second pole compensation stage and a third pole compensation stage connected in series along with the first pole compensation stage.
4 . An optical receiver system as in claim 1 wherein the compensation circuit additionally comprises:
a second pole compensation stage connected in parallel with the first pole compensation stage.
5 . An optical receiver system as in claim 1 wherein the compensation circuit additionally comprises a second pole compensation stage and a third pole compensation stage connected in parallel along with the first pole compensation stage.
6 . An optical receiver system as in claim 1 wherein the first pole compensation stage comprises an RC circuit used to control location of a zero frequency for the first pole compensation stage.
7 . An optical receiver system as in claim 1 wherein the first pole compensation stage comprises inductance used to control location of a zero frequency for the first pole compensation stage.
8 . A method for receiving an optical signal comprising:
detecting the optical signal with a light detector to produce an electrical signal;
amplifying the electrical signal with a transimpedance amplifier to produce an amplified signal; and,
performing pole compensation of the amplified signal to produce a compensated signal.
9 . A method as in claim 8 wherein pole compensation of the amplified signal is performed by a plurality of pole compensation stages connected in series.
10 . A method as in claim 8 wherein pole compensation of the amplified signal is performed by a plurality of pole compensation stages connected in parallel.
11 . A method as in claim 8 wherein pole compensation of the amplified signal is performed using an RC circuit used to control location of a zero frequency.
12 . A method as in claim 8 wherein pole compensation of the amplified signal is performed using inductance to control location of a zero frequency.
13 . An optical receiver system comprising:
a light detection means for detecting an optical signal and producing an electrical signal;
first amplification means for performing transimpedance amplification of the electrical signal to produce an amplified signal; and,
compensation means for performing pole compensation on the amplified signal to produce a compensated signal.
14 . An optical receiver system as in claim 13 wherein the compensation means comprises:
a plurality of pole compensation stages connected in series.
15 . An optical receiver system as in claim 14 wherein each pole compensation stage comprises an RC circuit used to control location of a zero frequency for the pole compensation stage.
16 . An optical receiver system as in claim 14 wherein each pole compensation stage comprises inductance used to control location of a zero frequency for the pole compensation stage.
17 . An optical receiver system as in claim 13 wherein the compensation means comprises a plurality of pole compensation stages connected in parallel.
18 . An optical receiver system as in claim 17 wherein each pole compensation stage comprises an RC circuit used to control location of a zero frequency for the pole compensation stage.
19 . An optical receiver system as in claim 17 wherein each pole compensation stage comprises inductance used to control location of a zero frequency for the pole compensation stage.