High bandwidth photodetector current replicator
US9614623B2 · kind B2 · utility
2Cited by
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14Claims
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Key dates
| Filing date | Aug 25, 2015 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Sep 21, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45212
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and systems for replicating high bandwidth current outputs from a photodetector or another current source include using a transimpedance amplifier (TIA) to directly generate a TIA voltage that is linear with optical power at the photodetector. The TIA voltage is used to generate a current that flows to a log amp, which generates a voltage that is linear with the optical power in dB. Additionally, offset cancellation is used at the TIA and at the log amp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.