Signal-to-noise ratio indicating circuit for FM receivers

Details Signal-to-noise ratio indicating circuit for FM receivers Signal-to-noise ratio indicating circuit for FM receivers

1989-11-30

1991-12-17

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455232, H04B 1702

Patent

active

050739760

ABSTRACT:
An FM broadcast receiver includes apparatus for measuring signal quality. Signal-to-noise ratio in the received signal is determined by isolating a noise component of the received audio signal, multiplying the isolated noise component by a gain determined by received field intensity, and comparing peak amplified noise against a reference. The derived signal-to-noise ratio can be employed to stop an automatic scan tuning operation or can be employed to provide a display of received signal-to-noise ratio.

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