Invention Grant
US07899431B2 DC offset correction system for a receiver with baseband gain control
有权
具有基带增益控制的接收机的直流偏移校正系统
- Patent Title: DC offset correction system for a receiver with baseband gain control
- Patent Title (中): 具有基带增益控制的接收机的直流偏移校正系统
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Application No.: US11099138Application Date: 2005-04-04
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Publication No.: US07899431B2Publication Date: 2011-03-01
- Inventor: Mahibur Rahman , Manish N. Shah , Charles L. Sobchak
- Applicant: Mahibur Rahman , Manish N. Shah , Charles L. Sobchak
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agency: Ingrassia Fisher & Lorenz, P.C.
- Main IPC: H04B1/26
- IPC: H04B1/26

Abstract:
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.
Public/Granted literature
- US20060222117A1 DC offset correction system for a receiver with baseband gain control Public/Granted day:2006-10-05
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