Am stereo demodulator

Details Am stereo demodulator Am stereo demodulator

H - Electricity

04

B

329/2, 325/73

H04B 1/16 (2006.01) H03D 1/22 (2006.01)

Patent

CA 1244101

ABSTRACT OF THE DISCLOSURE An AM stereo demodulator with which the transition from the stereo receiving mode to the monaural receiving mode upon a reduction in the field strength of the received signal is made gradual so as to eliminate an abrupt change in the sound quality. For stereo demodulation, a pair of reference signals are generated which are .pi./2 different in phase for stereo reception. As the field strength of the received signal approaches the level where a phase-locked loop in the demodulator would become unlocked from the carrier of the received signal, the phase difference between the two reference signals is gradually reduced to .pi./4.

492161

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