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:
Aug. 27, 1996
Filed:
Dec. 30, 1994
Richard C Gaus, Jr, Burnt Hills, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A frequency-shift keying (FSK) demodulator demodulates a binary signal encoded in an FSK signal. The present invention employs a bandpass filter to filter out noise and pass the frequencies used in the modulation. A comparitor converts the received signal into a square wave. A divider reduces the frequency of the square wave signal by a dividing factor. A counter counts the number of square wave transitions in a predetermined time period. A decision device receives the dividing factor from the divider, and uses this factor to adjust the count measured. The adjusted count is compared to counts pertaining to modulated frequencies to select a frequency. A bit value associated with the selected frequency is output for the time period being demodulated.