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:
Apr. 09, 2002
Filed:
Oct. 26, 1999
Yoshihiro Inada, Hyogo, JP;
Shinji Yamashita, Hyogo, JP;
Other;
Abstract
The AGC circuit is provided with an analog variable gain amplifying circuit which includes a plurality of fixed gain amplifiers and a selector for selecting one of the output signals of the plurality of fixed gain amplifiers, an A/D converter for receiving the selected output signal from the variable gain amplifying circuit, a digital band pass filter which allows only the burst signal and the color signal in the output signal from the A/D converter to pass through, and a digital AGC/detection circuit for controlling the gain of the variable gain amplifying circuit such that the burst signal remains stable and for amplifying the digital signal to obtain a digital output color signal such that the detected burst signal becomes equal in level to the digital reference signal. Thus, a more stable output signal can be obtained even with the variation in the ambient temperature or the power supply voltage.