发明名称 |
Method and apparatus for efficient DC calibration in a direct-conversion system with variable DC gain |
摘要 |
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. |
申请公布号 |
US9124338(B2) |
申请公布日期 |
2015.09.01 |
申请号 |
US201313908641 |
申请日期 |
2013.06.03 |
申请人 |
MaxLinear, Inc. |
发明人 |
Ling Curtis;Lo Andy;Sedalo Tete |
分类号 |
H04B1/06;H04B7/00;H04B1/10;H04B1/16;H04B1/40 |
主分类号 |
H04B1/06 |
代理机构 |
Kilpatrick Townsend & Stockton LLP |
代理人 |
Kilpatrick Townsend & Stockton LLP |
主权项 |
1. A direct conversion receiver comprising:
a first look-up table configured to store a first plurality of DC offset values each being associated with a different one of a first plurality of gains of a first amplification stage; and a frequency conversion module coupled to an output of the first amplification stage. |
地址 |
Carlsbad CA US |