Invention Grant
- Patent Title: Method and apparatus for efficient DC calibration in a direct-conversion system with variable DC gain
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Application No.: US13490142Application Date: 2012-06-06
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Publication No.: US08478221B2Publication Date: 2013-07-02
- Inventor: Curtis Ling , Andy Lo , Tete Sedalo
- Applicant: Curtis Ling , Andy Lo , Tete Sedalo
- Applicant Address: US CA Carlsbad
- Assignee: Maxlinear, Inc.
- Current Assignee: Maxlinear, Inc.
- Current Assignee Address: US CA Carlsbad
- Agency: Kilpatrick Townsend & Stockton LLP
- Agent Ardeshir Tabibi
- Main IPC: H04B1/06
- IPC: H04B1/06 ; H04B7/00 ; H04B1/10

Abstract:
A wireless communication receiver includes a multitude of look-up tables each storing a multitude of DC offset values associated with the gains of an amplification stage disposed in the wireless communication receiver. The entries for each look-up table are estimated during a stage of the calibration phase. During such a calibration stage, for each selected gain of an amplification stage, a search logic estimates a current DC offset number and compares it to a previous DC offset estimate that is fed back to the search logic. If the difference between the current and previous estimates is less than a predefined threshold value, the current estimate is treated as being associated with the DC offset of the selected gain of the amplification stage and is stored in the look-up table. This process is repeated for each selected gain of each amplification stage of interest until the look-up tables are populated.
Public/Granted literature
- US20120244826A1 Method and Apparatus for Efficient DC Calibration in a Direct-Conversion System with Variable DC Gain Public/Granted day:2012-09-27
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