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. 01, 2011
Filed:
Apr. 04, 2005
Mahibur Rahman, Lake Worth, FL (US);
Manish N. Shah, Vernon Hills, IL (US);
Charles L. Sobchak, Davie, FL (US);
Mahibur Rahman, Lake Worth, FL (US);
Manish N. Shah, Vernon Hills, IL (US);
Charles L. Sobchak, Davie, FL (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A method and apparatus are provided for providing improved radio frequency (RF) receiver signal correction. For RF receiver circuitry () having receive path and a warmup period associated therewith and including at least one analog baseband gain control stage () having a gain associated therewith, the method includes the step of performing a DC correction calculation operation during the warmup period to derive a DC correction value having a first component and a second component for each of the at least one gain control stage (). The DC correction calculation step includes the steps of performing a first closed loop correction () of a baseband path to derive the first component of the DC correction value and performing a second closed loop correction () of the receive path as a function of the () gain during the warmup period to derive the second component of the DC correction value. During operation after the warmup period (), an open loop correction is performed for instantaneous DC correction as function of the PMA () gain and the DC correction value.