The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 1985
Filed:
Dec. 05, 1983
Walter F Bridgewater, Santa Clara, CA (US);
Robert E De Caro, Hermosa Beach, CA (US);
Roger Larson, Fullerton, CA (US);
Llewellyn E Wall, Irvine, CA (US);
Irvine Sensors Corporation, Costa Mesa, CA (US);
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.