Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2006-02-14
2006-02-14
Vo, Nguyen T. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S340000
Reexamination Certificate
active
06999742
ABSTRACT:
A heterodyne receiver includes a tuner to select a frequency of a received signal and a converter to change the frequency of the received signal to an intermediate frequency. A single-pole/double throw switch has an input coupled to an output of the converter, a first output connected to a first band-pass filter and a second output connected to an amplifier. A second band-pass filter is coupled to an output of the amplifier, and a demodulator is coupled to an output of the second band-pass filter to produce an output signal and a characteristics signal. A logic circuit is coupled to receive the characteristics signal and for by-passing the first band-pass filter if the characteristics signal is less than a predetermined threshold.
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Brinkman Dirk
Curtin Andrew J.
Mitsubishi Electric Research Laboratories Inc.
Vo Nguyen T.
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