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:
Jan. 16, 2001
Filed:
Nov. 19, 1998
Gerardus C. M. Gielis, Eindhoven, NL;
Rudy J. Van De Plassche, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
To demodulate a quadrature input signal (S,) (for example, frequency shift) a demodulation unit (DEM) is used, comprising a PLL (P) having a complex mixer (M) and a controlled oscillator (V). Normally, a limiter has to be used to keep the loop gain independent of the amplitude of the quadrature input signal. In the PLL, a divider (DEL) is coupled between the mixer (M) and the oscillator (V) to divide the two mixed components (S,, S,) of the quadrature signal supplied by the mixer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile