Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2011-03-01
2011-03-01
Nguyen, Duc (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S232100, C455S296000
Reexamination Certificate
active
07899431
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.
REFERENCES:
patent: 5212826 (1993-05-01), Rabe et al.
patent: 5689815 (1997-11-01), Yamazaki et al.
patent: 6240100 (2001-05-01), Riordan et al.
patent: 6459889 (2002-10-01), Ruelke
patent: 6560447 (2003-05-01), Rahman et al.
patent: 6606359 (2003-08-01), Nag et al.
patent: 6717995 (2004-04-01), Zvonar
patent: 6735422 (2004-05-01), Baldwin et al.
patent: 6753727 (2004-06-01), Magoon et al.
patent: 2002/0151289 (2002-10-01), Rahman et al.
patent: 2004/0081256 (2004-04-01), Shi et al.
patent: 2004/0097212 (2004-05-01), Matsumoto et al.
patent: 2004/0119531 (2004-06-01), Shen et al.
patent: 2004/0121735 (2004-06-01), Tseng et al.
patent: 2004/0121741 (2004-06-01), Rashev et al.
patent: 2004/0121746 (2004-06-01), Akamine et al.
patent: 2004/0146128 (2004-07-01), Cuje et al.
patent: 2005020119 (2005-01-01), None
Rahman Mahibur
Shah Manish N.
Sobchak Charles L.
Akinyemi Ajibola
Freescale Semiconductor Inc.
Ingrassia Fisher & Lorenz P.C.
Nguyen Duc
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