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:
Sep. 03, 1991
Filed:
Nov. 14, 1989
Applicant:
Inventors:
Mitsutoshi Sugawara, Tokyo, JP;
Shinji Nozawa, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
330 51 ; 307243 ; 328154 ; 330295 ;
Abstract
An amplifying circuit has a plurality of first signal input circuits for multi-channel input, a signal output circuit receptive commonly of outputs of these signal input circuits, and a switching circuit for selecting one of the first signal input circuits. A second signal input circuit has an input terminal held at a fixed potential and an output terminal connected to the signal output circuit and is operative during a selecting transient period of the plurality of first signal input circuits.