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:
Dec. 31, 1996
Filed:
Oct. 18, 1995
Cornelis C Schuur, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Data terminal comprising a demodulator for a FSK phase-coherent modulated signal having at least two frequencies, comprising a PLL circuit (10) in which a phase detector is combined with a real-time integrator (15) and in which a sequencer (5) is included, so that the modulated signal is integrated around the zero crossings before a clock signal and digital data are extracted from this signal after a phase lock. As long as the PLL circuit (10) is in the unlocked state, the frequency with which the integrator (15) is driven by the sequencer (5) is equal to half the bit rate of the modulated signal while, for that matter, this frequency is equal to the bit rate.