Apparatus for controlling the receive and transmit frequency of a transceiver
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United States of America Patent
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-
Dec 18, 1984
Grant Date -
N/A
app pub date -
Jul 19, 1982
filing date -
Jul 19, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for maintaining a transmit radio signal frequency in a predetermined frequency relationship with a received radio signal. A common voltage controlled frequency source serves as an Lo signal generator for both the receiver and transmitter. A reference frequency oscillator is phase compared with a receive IF signal to derive a control voltage for the voltage controlled frequency source. The resulting phase lock loop provides transmit signal frequency control with respect to a received signal.
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