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. 20, 2008
Filed:
Sep. 29, 2006
Louie Serrano, Irvine, CA (US);
Alireza Zolfaghari, Irvine, CA (US);
Paul Lettieri, Lake Forest, CA (US);
Hea Joung Kim, Irvine, CA (US);
Hooman Darabi, Irvine, CA (US);
Henrik Jensen, Long Beach, CA (US);
Behnam Mohammadi, Aliso Viejo, CA (US);
Louie Serrano, Irvine, CA (US);
Alireza Zolfaghari, Irvine, CA (US);
Paul Lettieri, Lake Forest, CA (US);
Hea Joung Kim, Irvine, CA (US);
Hooman Darabi, Irvine, CA (US);
Henrik Jensen, Long Beach, CA (US);
Behnam Mohammadi, Aliso Viejo, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Methods and apparatus for calibrating a transitional loop, such as a phase locked loop, are disclosed. An example method includes performing an open loop calibration of a voltage controlled oscillator (VCO). The open loop calibration includes tuning the output oscillation frequency of the VCO to within a predetermined range of frequencies. The example method further includes determining a voltage offset and a gain error of an analog to digital converter (ADC) coupled with the phase locked loop. The example method also includes determining a gain offset of the open loop calibrated VCO using the voltage offset and the gain error of the ADC. In the example method, a signal provided by a charge pump of the PLL is adjusted based on the determined gain offset.