Optical receiver using variable negative-capacitance circuit
US6785477B1 · kind B1 · utility
9Cited by
1References
19Claims
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Key dates
| Filing date | Sep 19, 2000 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Sep 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6931
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A large time constant is caused due to parasitic capacitance at an anode terminal of a photodetector of an optical receiver. Therefore, an optical receiver wherein a variable negative capacitor mainly including an NPN-type transistor operable at high speed is configured and is connected to the input terminal of a preamplifier to which the output of the photodetector is input so that parasitic capacitance caused in the photodetector and due to packaging is equivalently reduced and the fluctuation of parasitic capacitance caused due to manufacturing dispersion is also compensated is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.