Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Reexamination Certificate
2011-03-29
2011-03-29
Vo, Nguyen (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
C455S293000, C455S340000, C455S341000, C330S305000, C333S235000
Reexamination Certificate
active
07917117
ABSTRACT:
This document discloses, among other things, a front end circuit having a selectable center frequency. The center frequency is selected based on a control signal proportional to a phase difference between a reference frequency and an amplifier output. A resonant frequency of a tank circuit coupled to the amplifier is tuned using the control signal.
REFERENCES:
patent: 7282998 (2007-10-01), Chen
patent: 7643809 (2010-01-01), Meacham
patent: 2004/0100330 (2004-05-01), Chandler
Kim, Min-Gun, et al., “3V GaAs MESFET Monolithic Transmitter with Cross-Coupled Common-Source, Common-Gate Pair Linear Mixer for Cellular Hand-Held Phones”,1999 IEEE Radio Frequency Integrated Circuits(RFIC)Symposium, (1999), 207-210.
Otis Brian
Zafonte Steven
Schwegman Lundberg & Woessner, P.A.
University of Washington
Vo Nguyen
LandOfFree
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