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:
Mar. 24, 1981
Filed:
Apr. 12, 1979
Applicant:
Inventor:
Toshihiko Ryu, Tokyo, JP;
Assignee:
Nippon Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03H / ; H04B / ;
U.S. Cl.
CPC ...
333 18 ; 328155 ; 333 / ;
Abstract
An amplitude equalizer includes a pair of serially connected unit amplitude equalizers, each having complementary delay distortion characteristics to flatten the overall delay distortion characteristic. The unit equalizers include amplifiers or attenuators, delay circuits, and/or phase shifters. The amplitude versus frequency characteristic of the overall equalizer can be varied by controlling one or more of the attenuator/amplifiers and phase shifters. The variation can be controlled by a feedback circuit.