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:
Dec. 07, 1993
Filed:
Mar. 13, 1992
Applicant:
Inventors:
Osamu Kihara, Kyoto, JP;
Kensuke Sawase, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
35821316 ;
Abstract
A signal output circuit is used for an IC-patterned image sensor, including, at its signal processing part, source-follower amplifiers for converting a high impedance image signal to a low impedance image signal. To eliminate offset voltages of the amplifiers, an amplifier for converting the impedance of the image signal is disposed in parallel to an amplifier for converting an impedance of a reference voltage. A differential amplifier is used to calculate a difference between the foregoing two amplifiers. The signal output circuit includes a trimming circuit to adjust an offset voltage of these amplifiers.