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:
Mar. 13, 2012
Filed:
Jun. 10, 2010
Meei-ling Chiang, Cupertino, CA (US);
Dennis M. Fischette, Mountain View, CA (US);
Alvin Leng Sun Loke, Ft. Collins, CO (US);
Michael M. Oshima, Los Altos, CA (US);
Meei-Ling Chiang, Cupertino, CA (US);
Dennis M. Fischette, Mountain View, CA (US);
Alvin Leng Sun Loke, Ft. Collins, CO (US);
Michael M. Oshima, Los Altos, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A circuit and method for calibrating a VCO (voltage controlled oscillator) is disclosed. In one embodiment, a circuit includes a VCO and a bias control circuit coupled to a tail node of the VCO. An amplitude control unit may also be coupled to the tail node, wherein the amplitude control unit is configured to determine the amplitude of a VCO output signal based on a voltage present on the tail node. The amplitude control unit may also be configured to generate a bias voltage based on the amplitude of the VCO output signal and a target voltage. The bias control circuit may be coupled to receive the bias voltage from the amplitude control unit and may be further configured to adjust the voltage on the tail node based on the received bias voltage.