Multiple-line superheterodyne transmission and reception device
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United States of America Patent
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Apr 6, 1993
Grant Date -
N/A
app pub date -
Jul 3, 1991
filing date -
Jul 4, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A transmitting and multiple line superheterodyne receiving device and transmitting device for the communications, particularly telecommunications field is disclosed. To suppress the modulation signal components otherwise generated by the transmitting device, a compensation device is provided which includes a frequency control circuit with a voltage controlled oscillator, whose nominal frequency corresponds to the sum or difference of the first and second intermediate frequencies and which is connected to a second receiving mixer.
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