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:
May. 13, 2003
Filed:
Dec. 14, 1999
Applicant:
Inventor:
Bert Fransis, San Diego, CA (US);
Assignee:
Conexant Systems, Inc., Newport Beach, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/26 ; H04B 1/18 ; H04B 1/16 ; H04B 7/00 ;
U.S. Cl.
CPC ...
H04B 1/26 ; H04B 1/18 ; H04B 1/16 ; H04B 7/00 ;
Abstract
An LO generation circuit generates an LO signal by doubling and quadrupling the frequency of a VCO signal. The frequency doubling and quadrupling provides high VCO-RF isolation as well as suppression of spurious noise signals in the LO output. The frequency doubler takes a quadrature signal input and utilizes mixer cores having double balanced transistor pairs to provide an output signal having doubled frequency but maintaining the phase balance of the input signal.