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:
Jun. 10, 2003
Filed:
Jul. 05, 2000
Yasushi Iwata, Shizuoka, JP;
Yasufumi Ichikawa, Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
When an input signal S is variable-gain-amplified by a variable gain amplifier to obtain a predetermined output signal S , a variable gain control signal S is generated by a detecting circuit , an A/D converter , an adder , and a converting unit . Both a latch circuit and an adder calculate a difference between a variable gain control signal generated during a preceding control operation and a present variable gain control signal. When the difference result is equal to “0”, a counter counts predetermined stable condition continued time, and thereafter outputs a non-operation setting signal S . Also, the counter sends out the variable gain control signal generated during the preceding control operation to the variable gain amplifier so as to set the detecting circuit , the A/D converter , the adder , and the converting unit into non-operation conditions thereof.