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. 30, 1998
Filed:
Aug. 19, 1996
Jeoung-in Lee, Bucheon, KR;
Yank-gyun Kim, Seoul, KR;
Abstract
An apparatus for detecting a pilot signal. A phase detector detects a phase difference between a filtered amplitude-modulated pilot signal and a frequency divided signal, and a low pass filter low-pass-filters the phase difference. A voltage-controlled oscillator outputs a clock signal having a frequency determined by an output signal of the low-pass filter and outputs the clock signal having the frequency determined by an oscillation control signal. A (1/N) frequency divider divides the switching signal and outputs the (1/N) divided signal as a frequency divided signal, and an envelope detector detects an envelope of the filtered amplitude-modulated pilot signal and outputs the detected envelope as the pilot signal. The frequency of the pilot signal has information used to discriminate a broadcasting state. Therefore, the manufacturing cost and the number of pins in an integrated circuit can both be reduced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile