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. 29, 2003
Filed:
Sep. 04, 2001
Minoru Imura, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a frequency adjusting circuit, an oscillator outputs cosine and sine waves. A quadrature demodulator extracts and outputs the baseband signal of an in-phase component from a carrier wave input from an antenna using the cosine wave and the baseband signal of a quadrature component from the carrier wave using the sine wave. First and second A/D converters convert the baseband signals into digital signals. First and second despreaders despread the digital signals. A frequency error detection section detects the error between the frequency of the carrier wave and the frequency of the cosine and sine waves from the values of the signals output from the despreaders. A reference oscillator outputs the value of an oscillation frequency as the frequency of the cosine and sine waves and changes the value of the oscillation frequency to cancel the detected frequency error.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile