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

H - Electricity

04

B

325/71

H04B 1/16 (2006.01) H04B 1/10 (2006.01)

Patent

CA 2026812

-18- 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. 4376L

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