Single voltage controlled oscillator modem

Details Single voltage controlled oscillator modem Single voltage controlled oscillator modem

1979-02-26

1980-10-21

Safourek, Benedict V.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

375 8, H04B 154

Patent

active

042298270

ABSTRACT:
A modem for transmitting data over one frequency and receiving data over another frequency is disclosed having an oscillator for generating a first signal, a voltage controlled oscillator for generating a second signal, a mixer for mixing the first and second signals to provide a mixer output signal having the transmission frequency, an input data switch for modulating the mixer output signal in accordance with input data, a second mixer connected to the voltage controlled oscillator and to the received incoming signal and a receiver for demodulating the received signal data.

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patent: 4035727 (1977-07-01), Ishii
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