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:
Sep. 20, 2011
Filed:
Apr. 22, 2008
Mazhareddin Taghivand, Campbell, CA (US);
Conor Donovan, San Francisco, CA (US);
Jeongsik Yang, Cupertino, CA (US);
Sang-oh Lee, Cupertino, CA (US);
Mazhareddin Taghivand, Campbell, CA (US);
Conor Donovan, San Francisco, CA (US);
Jeongsik Yang, Cupertino, CA (US);
Sang-Oh Lee, Cupertino, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Techniques for compensating for the effects of temperature change on voltage controlled oscillator (VCO) frequency are disclosed. In an embodiment, an auxiliary varactor is coupled to an LC tank of the VCO. The auxiliary varactor has a capacitance controlled by a temperature-dependant control voltage to minimize the overall change in VCO frequency with temperature. Techniques for generating the control voltage using digital and analog means are further disclosed.