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. 08, 1998
Filed:
Aug. 01, 1997
Applicant:
Inventor:
Vince Birleson, W. Tawakoni, TX (US);
Assignee:
Microtune, Inc., Plano, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ; H03L / ; H04B / ; H04B / ;
U.S. Cl.
CPC ...
331-2 ; 331 16 ; 331 39 ; 331 41 ; 455260 ; 455316 ; 455318 ;
Abstract
An interference free local oscillator circuit is disclosed. A first local oscillator signal is generated in a first phase locked loop. A second local oscillator signal is generated in a second phase locked loop. Third and fourth phase locked loops provide inputs to the second phase locked loop to control the second local oscillator frequency. The operating frequencies of the first and second local oscillator signals are selected so that spurious signals generated in the phase locked loops do not interfere with a received RF signal in a conversion circuit.