Amplifiers – Having light-controlled or activated device
Patent
1985-04-01
1986-03-04
Mullins, James B.
Amplifiers
Having light-controlled or activated device
455619, 250214AG, 330284, H01J 4014
Patent
active
045742499
ABSTRACT:
A nonintegrating, high sensitivity, wide dynamic range receiver is described. A voltage dependent current source is connected in negative feedback with a forward voltage amplifier. The transconductance of the current source is essentially independent of frequency within the signal bandwidth frequency, and the feedback pole is the dominant pole in the loop gain. To prevent saturation by high intensity input signals the receiver is combined with a range extender circuit.
REFERENCES:
patent: 4048573 (1977-09-01), Evans et al.
patent: 4415803 (1983-11-01), Muoi
"An Optical Repeater with High Impedance Input Amplifier" The Bell System Technical Journal, vol. 53, No. 4, Apr. 1974, pp. 629-643, J. E. Goell.
"p-i-n/F.E.T. Hybrid Optical Receiver for Longer-Wavelengths Optical Communication Systems", Electronics Letters, vol. 16, No. 2, Jan. 17, 1980, pp. 69-71, D. R. Smith et al.
"Optical Detector Package", The Bell System Technical Journal, vol. 57, No. 6, Jul.-Aug. 1978, pp. 1809-1822, R. G. Smith et al.
"GaAs F.E.T. Transimpedance Front-End Design for a Wideband Optical Receiver", Electronics Letters, vol. 15, 1979, pp. 650-652, K. Ogawa et al.
"Bi-FET Op Amps Simplify AGC Threshold Design" Designer's Casebook, Electronics, Apr. 21, 1981, vol. 54, No. 7, John H. Davis.
AT&T Bell Laboratories
Mullins James B.
Urbano Michael J.
Wan G.
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