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. 03, 2001
Filed:
Nov. 18, 1998
Kazuyuki Kikuchi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A video intermediate-frequency signal processing device capable of receiving FM broadcasts, includes a first FM detecting unit for demodulating an intermediate-frequency signal from a sound intermediate-frequency detecting unit using a phase-locked loop, and for furnishing a demodulated FM signal, a second FM detecting unit for detecting or demodulating a reference signal applied to generate a reference DC voltage, a comparator for obtaining a difference between the modulated FM signal from the first FM detecting unit and the reference DC voltage from the second FM detecting unit, and for furnishing, as a sound signal, a signal having a value corresponding to the difference, and a feedback unit for, when receiving FM broadcasts, filtering the output of the comparator, and feeding the filtered output back to a low-pass filter of a phase-locked loop included in a video detecting unit.