Method and apparatus for providing a standby signal

Details Method and apparatus for providing a standby signal Method and apparatus for providing a standby signal

1978-03-13

1980-01-22

Bookbinder, Marc E.

325409, H04B 116

Patent

active

041852435

ABSTRACT:
The disclosed signal generating apparatus and method is suitable for use in combination with a PM receiver to provide a standby signal for a signal processor. The standby signal system includes a clipper connected to the receiver IF; a coherent amplitude detector coupled between the clipper and a gain controlled amplifier; and a trigger circuit coupled between the coherent amplitude detector and the signal processor. The trigger circuit provides a standby signal in response to the level of the output signal of the coherent amplitude detector passing through a predetermined threshold level in response to the clipper limiting on a selected signal-to-noise ratio which occurs before the information signal becomes undesirably weak.

REFERENCES:
patent: 3358234 (1967-12-01), Stover

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