Transmit/receive solid state switching system

Details Transmit/receive solid state switching system Transmit/receive solid state switching system

1982-03-01

1984-12-04

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

200 6102, 367903, G01S 752

Patent

active

044868677

ABSTRACT:
A solid state transmit/receive switching circuit is provided by a system which, in accordance with the invention, comprises a solid state relay which, when energized, causes an optically controlled resistor connected to an input terminal of a preamplifier of the receiver to change its resistance and hence the sensitivity of the preamplifier according to the transmitter transmission state.

REFERENCES:
patent: 3414872 (1968-12-01), Barron
patent: 3562597 (1971-02-01), White
patent: 4139834 (1979-02-01), Matsui et al.
patent: 4236084 (1980-11-01), Gingras
patent: 4263646 (1981-04-01), Beatty
patent: 4277710 (1981-07-01), Harwood et al.
patent: 4360853 (1982-11-01), Welk
patent: 4387434 (1983-06-01), Moncrief, Jr. et al.

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