Superheterodyne tranceiver with bilateral first mixer and dual phase locked loop frequency control
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United States of America Patent
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Jun 6, 1995
Grant Date -
N/A
app pub date -
Sep 24, 1993
filing date -
Sep 24, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transceiver which operates in separate transmit and receive bands has a first conversion stage for generating a first IF signal translation of a receive signal, which first conversion stage also functions as a first and final, hence, single conversion stage for generating a transmit signal at its transmission frequency. A modulated transmit signal component used in the single conversion to the transmission frequency of the transmission signal has harmonics which lie outside the transmission band and is of a frequency which permits a substantial overlap of transmit and receive injection frequencies generated by a first numerically controlled signal generator which are applied to a first mixer of the first conversion stage during respective transmit and receive mode operations.
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