Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2006-01-19
2009-06-23
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S322000, C375S354000, C375S316000, C375S229000, C375S371000, C375S225000, C370S503000, C370S442000, C370S354000, C348S614000, C348S607000
Reexamination Certificate
active
07551694
ABSTRACT:
A limiter based analog demodulator includes a power amplifier receiving a base-band signal and a local clock operating at the base-band frequency. A first multiplier receives an output from the power amplifier and the local clock to provide an in phase signal. A quadrature phase shifter receives the local clock and a second multiplier receives the output from the power amplifier and an output from the phase shifter to provide a quadrature signal. Analog filters receive the in phase and quadrature signals and analog to digital converters connected to the analog filters provide digitized in phase and quadrature signals. The phase detector then receives the digitized in phase and quadrature signals.
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Jiang Steve Xuefeng
Zhang Zhongxuan
Zhao Lixin
Fan Chieh M.
Marvell World Trade Ltd.
Puente Eva
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