Parametric diode amplifier
US4805237A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1988 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | May 10, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/64
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A parametric photodiode amplifier suitable for detecting light of frequency f and intensity P and having intersecting I:V curves for zero incident light and for incident light of intensity P. These photodiodes typically have an intrinsic density of carriers that is on the order of or less than the density of carriers produced by incident light of intensity P. When the photodiode is biased by an LO signal and is illuminated with modulated light of carrier frequency f, the photodiode output signal contains IF components at the difference between the frequencies of the modulation signal and the frequencies of on the order of the 23 lower harmonics of the LO signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.