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. 04, 2000
Filed:
Sep. 18, 1996
Applicant:
Inventors:
Sergio A Sanielevici, Redwood City, CA (US);
Abhijit A Shah, Sunnyvale, CA (US);
Assignee:
Wireless Access, Santa Clara, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375324 ; 375326 ; 329300 ; 329301 ;
Abstract
A demodulation circuit providing for detection of multiple zero-crossings in an FSK signal. High data rate signals are demodulated by generating, for each pair of baseband signals I and Q, additional I and Q pairs which are phase shifted from the original I and Q pair. By generating zero crossing signals for the original baseband signals and for the phase shifted signals, additional zero crossings may be detected allowing demodulation of relatively high data rate modulated signals.