Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2011-03-08
2011-03-08
Payne, David C. (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C455S118000, C455S313000, C455S314000, C455S315000, C455S316000, C455S317000, C455S318000, C455S319000, C455S320000, C455S321000, C455S322000, C455S323000, C455S324000, C455S325000, C455S326000, C455S327000, C455S328000, C455S329000, C455S330000, C455S331000, C455S332000, C455S333000, C455S334000
Reexamination Certificate
active
07903762
ABSTRACT:
A direct conversion multi-band TV tuner includes: a plurality of RF (radio frequency) paths for processing the RF signal and for generating a plurality of processed RF signals, respectively; and a TSC (tri-state chopper) based quadrature frequency converter for receiving one of said processed RF signals and converting the received processed RF signal into a in-phase baseband signal and a quadrature baseband signals; wherein the TSC based quadrature frequency converter operates in accordance with a first set of periodic three-state control signals and a second set of periodic three-state control signals that are approximately 90 degrees offset from the first set of periodic three-state control signals.
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Taiwan Office Action dated Nov. 16, 2010, A9900392.474.
Bolourchi Nader
Payne David C.
REALTEK Semiconductor Corp.
Thomas Kayden Horstemeyer & Risley LLP
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