发明名称 |
DC offset correction system for a receiver with baseband gain control |
摘要 |
A method and apparatus are provided for providing improved radio frequency (RF) receiver signal correction. For RF receiver circuitry (106) having receive path and a warmup period associated therewith and including at least one analog baseband gain control stage (218) 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 (218). The DC correction calculation step includes the steps of performing a first closed loop correction (460) of a baseband path to derive the first component of the DC correction value and performing a second closed loop correction (462) of the receive path as a function of the (218) gain during the warmup period to derive the second component of the DC correction value. During operation after the warmup period (464 , 466), an open loop correction is performed for instantaneous DC correction as function of the PMA (218) gain and the DC correction value.
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申请公布号 |
US7899431(B2) |
申请公布日期 |
2011.03.01 |
申请号 |
US20050099138 |
申请日期 |
2005.04.04 |
申请人 |
FREESCALE SEMICONDUCTOR, INC. |
发明人 |
RAHMAN MAHIBUR;SHAH MANISH N.;SOBCHAK CHARLES L. |
分类号 |
H04B1/26 |
主分类号 |
H04B1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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