Resonance-type optical receiver circuit having a maximum amplifi

Details Resonance-type optical receiver circuit having a maximum amplifi Resonance-type optical receiver circuit having a maximum amplifi

1993-01-19

1994-12-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

359189, H04B 1006, H03G 320

Patent

active

053731522

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: 4540952 (1985-09-01), Williams
patent: 4574249 (1986-03-01), Williams
patent: 5257285 (1993-10-01), Thorp
"Tuned Front-End Design for Heterodyne Optical Receivers", G. 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", Kamal E. Alameh et al., IEEE Transactions on Microwave Theory and Techniques, vol. 38, No. 5, May 1990, pp. 546-551.
"Resonant p-i-n FET Receivers for Lightwave Subcarrier Systems", Thomas E. Darcie, et al, Journal of Lightwave Technology, vol. 6, No. 4, Apr. 1988, pp. 582-589.
"A Novel Resonance-Type Optical Receiver for High-Speed Optical Heterodyne Transmission Systems", Noboru Takachio et al., Journal of Lightwave Technology, vol. 7, No. 9, Sep. 1989, pp. 1371-1378.

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