Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1983-12-05
1985-11-26
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
330 59, H01J 4014
Patent
active
045556237
ABSTRACT:
A pre-amplifier located "at the focal plane" of a detector array is disclosed which uses MOSFET transistors operated in the "weak inversion" region to provide operational amplifier performance. The dimensions of certain of the transistors are designed to minimize noise amplification. Feedback resistance for the operational amplifier is provided by switched capacitance using MOSFET transistors as switches, thereby permitting adjustment of the amplifier gain. Implanted and non-implanted MOSFET transistors are used in the differential amplifier in such a way as to avoid the need for a biasing network.
REFERENCES:
Jaeger; Active Load for Differential Amplifiers; Mar. 1974; IBM Tech. Disclosure Bulletin, vol. 16, #10, 3140-41.
Bridgewater Walter F.
De Caro Robert E.
Larson Roger
Wall Llewellyn E.
Gatto J.
Irvine Sensors Corporation
Nelms David C.
Plante Thomas J.
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