Oscillator control circuit

Details Oscillator control circuit Oscillator control circuit

1982-02-22

1984-02-07

Bookbinder, Marc E.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 87, H04B 144, H04B 150

Patent

active

044307560

ABSTRACT:
An oscillator is controlled so that it produces the correct frequency in the transmitting condition, and so that it produces a slightly different frequency in the receiving condition. This is achieved by a circuit which supplies a first control voltage to the oscillator for transmitting and which supplies a second and different control voltage to the oscillator for receiving. This second and different control voltage causes the oscillator frequency in the receiving condition to be different so that there is no interference to or improper operation of a repeater system. The circuit also prevents any modulation signals from reaching the oscillator in the receiving condition, thus preventing false signals or other problems.

REFERENCES:
patent: 3153194 (1964-10-01), Orwin
patent: 3300720 (1967-01-01), Kowols
patent: 4095183 (1978-06-01), Kakigi

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