Pilot tone detector utilizing phase deviation signals

Details Pilot tone detector utilizing phase deviation signals Pilot tone detector utilizing phase deviation signals

H - Electricity

04

B

325/73

H04B 1/16 (2006.01) H04H 5/00 (2006.01)

Patent

CA 1166317

Abstract An AM stereophonic pilot tone is detected using two signals derived from a received broadcast signal. One signal is proportional to the phase deviation and one is a two-level signal which is a function of the magnitude of the phase deviation. The detector controls activation of the visual indicator, muting of the stereo channel of mono/stereo mode switching with almost complete elimina- tion of false detections during monophonic transmission and poor stereo transmission.

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