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:
Jul. 27, 1999
Filed:
Apr. 14, 1997
Tsutomu Haruta, Kanagawa, JP;
Kazuo Kumano, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An automatic gain control method and device capable of maintaining the gain within a predetermined proper range by first amplifying an input analog signal from a microphone or the like, then sampling the amplified analog signal while comparing the voltage thereof with a predetermined reference voltage, and when the number of times that the voltage of the amplified analog signal is higher than the reference voltage exceeds a predetermined number of times, varying the gain of the amplified analog signal stepwise in response to every excess beyond the predetermined number of times. Consequently it becomes possible to eliminate the necessity of an input amplifier of a sufficient bandwidth and an A-D converter, hence realizing manufacture of an improved device composed of a single-chip CMOS integrated circuit, with further advantages of minimizing the number of required component parts, reducing the production processes, achieving a higher integration density and lowering the power consumption.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile