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. 15, 1998
Filed:
Oct. 31, 1996
Applicant:
Inventors:
Takuji Himeno, Chiba, JP;
Hiroshi Takahata, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341139 ;
Abstract
A gain varying device includes a zero-cross detector for detecting a zero cross or a vicinity thereof in an input analog or digital signal, an analog gain varier for varying the gain of the input analog signal, and a digital gain varier for varying the gain of the input digital signal. In this device, the timing to vary the gain of the analog or digital signal in the individual gain varier is determined in accordance with the zero-cross detection timing, so that smooth switching can be realized in the gain varying operation without generation of any audible noise.