Resonance-type optical receiver and receiving method for low-fre

Details Resonance-type optical receiver and receiving method for low-fre Resonance-type optical receiver and receiving method for low-fre

1993-11-02

1994-11-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

359189, 331167, H04B 1006

Patent

active

053671562

ABSTRACT:
The present invention provides a resonance-type optical receiver circuit which keeps predetermined small distortion even when the received light level becomes high. The resonance-type optical receiver circuit varies the resistance value of variable resistance element 80, which is used as a load resistor to optical detector 4, in response to the intensity of output signal 10 of an amplifier. The load resistor varies in response to a variations of the received light level of the optical detector in this manner to keep the input to the amplifier lower than a fixed value.

REFERENCES:
patent: 4453145 (1984-06-01), Schuster
patent: 5008526 (1991-04-01), Green
patent: 5072200 (1991-12-01), Ranky
"A Novel Resonance-Type Optical Receiver for High-Speed Optical Hyterodyne Transmission Systems," Noboru Takachio et al., Journal of Light Wave Technology, vol. 7, No. 9, Sep. 1989, pp. 1371-1378.
"Resonant P-I-N-FET Receivers for Lightwave Subcarrier Systems", Darcie et al., Journal of Lightwave Technology, vol. 6, No. 4, Apr. 1988, pp. 582-589.
"Tuned Front-End Design for Heterodyne Optical Receivers", Jacobsen et al., Journal of Lightwave Technology, vol. 7, No. 1, Jan. 1989, pp. 105-114.
"Tuned Optical Receivers for Microwave Subcarrier Multiplexed Lightwave Systems," Alomeh et al., IEEE Transactions on Microwave Theory and Techniques, vol. 38, No. 5, May 1990, pp. 546-551.

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