High-quality reception indicating circuit for FM receivers

Details High-quality reception indicating circuit for FM receivers High-quality reception indicating circuit for FM receivers

1989-11-30

1992-06-23

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4552262, 455297, 381 13, H04B 110

Patent

active

051251051

ABSTRACT:
The reception of FM broadcast signals having a selected high sound quality is determined according to criteria including a low noise level and the absence of interference. The high quality information is employed to terminate a scan tuning operation or to activate an ultrasonic noise filter to improve listening quality of the FM audio output. The absence of noise and interference is determined by examining a particular frequency range from the FM field intensity line generated by an intermediate frequency circuit.

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