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. 01, 1986
Filed:
Apr. 04, 1984
Alexander P Lax, London, GB;
Multitone Electronics PLC, London, GB;
Abstract
An FM demodulator includes frequency conversion means (20) to derive from an FM input signal (10) a pair of like signals that are mutually phase-displaced by 90.degree.. Such signals are filtered (26,28), squared (30,32) and sampled (38). The output signal (40) of the sampling means (38) is used to control (62) the local oscillator (16) of the frequency conversion means (20). In one arrangement, the magnitude of the control applied to the oscillator (16) is dependent on the frequency of one of the squared (30) signals, whereas the direction is dependent on the logic state of the output signal (40). A similar control method can be applied to a superheterodyne receiver.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile