Method and system for a narrowband, non-linear optoelectronic receiver
View Patent ↗Methods and systems for a narrowband, non-linear optoelectronic receiver are disclosed and may include amplifying a received signal, limiting a bandwidth of the received signal, and restoring the signal utilizing a level restorer, which may include a non-return to zero (NRZ) level restorer. The NRZ level restorer may include a pulse-triggered bistable circuit, which may include two parallel inverters, with one being a feedback path for the other. The inverters may be single-ended or differential. A photogenerated signal may be amplified in the receiver utilizing a transimpedance amplifier and programmable gain amplifiers (PGAs). A received electrical signal may be amplified via PGAs. The bandwidth of the received signal may be limited utilizing one or more of: a low pass filter, a bandpass filter, a high pass filter, a differentiator, or a series capacitance on the chip. The signal may be received from a photodiode integrated on the chip.
1. A method for processing signals, the method comprising:
in a receiver on a chip,
amplifying a received signal that is generated from a received optical signal;
limiting a bandwidth of said received signal utilizing a band pass filter that results in a narrow frequency band comprising a maximum data tone of the received signal; and
restoring said received signal utilizing a non-return to zero (NRZ) level restorer comprising a pulse-triggered bistable circuit, wherein said pulse-triggered bistable circuit comprises two parallel inverters, and wherein a first of said inverters comprises a feedback path for a second of said inverters.
2. The method according to claim 1 , wherein said inverters comprise single-ended inverters.
3. The method according to claim 1 , wherein said inverters comprise differential inverters.
4. The method according to claim 1 , comprising amplifying a photogenerated signal in said receiver utilizing a transimpedance amplifier and one or more variable gain amplifiers (VGAs).
5. The method according to claim 1 , comprising amplifying a received electrical signal via one or more VGAs.
6. The method according to claim 1 , comprising limiting said bandwidth of said received signal utilizing one or more of: a differentiator or a series capacitance on said chip.
7. The method according to claim 1 , comprising receiving said signal from a photodiode integrated on said chip.
8. A system for processing signals, the system comprising:
in a receiver on a chip, one or more circuits operable to amplify a received signal that is generated from a received optical signal;
said one or more circuits comprise a band pass filter that limits a bandwidth of said received signal to a narrow frequency band that comprises a maximum data tone of the received signal; and
said one or more circuits restore said received signal utilizing a Non-return to Zero (NRZ) level restorer comprising a pulse-triggered bistable circuit, wherein said pulse-triggered bistable circuit comprises two parallel inverters, and wherein a first of said inverters comprises a feedback path for a second of said inverters.
9. The system according to claim 8 , wherein said inverters comprise single-ended inverters.
10. The system according to claim 8 , wherein said inverters comprise differential inverters.
11. The system according to claim 8 , wherein said one or more circuits are enabled to amplify a photogenerated signal in said receiver utilizing a transimpedance amplifier and one or more variable gain amplifiers (VGAs).
12. The system according to claim 8 , wherein said one or more circuits are enabled to amplify a received electrical signal via one or more VGAs.
13. The system according to claim 8 , wherein said one or more circuits are enabled to limit said bandwidth of said received signal utilizing one or more of: a differentiator or a series capacitance on said chip.
14. The system according to claim 8 , wherein said one or more circuits are enabled to receive said signal from a photodiode integrated on said chip.