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. 19, 1995
Filed:
Mar. 25, 1994
Applicant:
Inventors:
Assignee:
Mitsumi Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G / ;
U.S. Cl.
CPC ...
330282 ; 330 86 ;
Abstract
An amplifying circuit includes: amplifying device for amplifying an input signal and outputting the amplified signal; feedback device for feeding the output signal from the amplifying device back to an input terminal of the amplifying device so that the output signal may have a predetermined frequency characteristic; and a variable impedance circuit which, included in the feedback device, operates on the basis of a current from a current source, and which has its impedance altered in accordance with the current.