Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2003-05-20
2008-08-12
Jackson, Blane J. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S334000, C455S200100, C348S731000
Reexamination Certificate
active
07412222
ABSTRACT:
A direct conversion radio frequency (RF) tuner includes a mixer generating I and Q quadrature components. A phase detection circuit generates a phase error measurement between the I quadrature component and the Q quadrature component. A phase correction circuit corrects a phase of the Q component based on the phase error measurement, and outputs a phase-corrected Q quadrature component. An I quadrature component gain control circuit receives the I quadrature component and outputting an amplitude corrected I quadrature component. A Q quadrature component gain control circuit receives the phase corrected Q quadrature component and outputs an amplitude corrected Q quadrature component.
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Broadcom Corporation
Jackson Blane J.
Sterne Kessler Goldstein & Fox P.L.L.C.
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