FM receiver and communication systems including same

Details FM receiver and communication systems including same FM receiver and communication systems including same

1990-01-25

1994-02-22

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

329343, H04H 500

Patent

active

052895432

ABSTRACT:
An FM receiver includes an FM discriminator having a comparator for converting the FM signal to a series of discrete square-wave pulses all of the same amplitude and of a repetition rate varying with the frequency of the FM signals; and an integrator circuit which integrates the series of monopolar square-wave pulses to produce an output signal having an amplitude varying with the repetition rate of the square-wave pulses. Also described are FM stero systems including the above FM discriminator in its audio channels.

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patent: 3462688 (1969-08-01), Abel
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patent: 3586980 (1971-06-01), Krausser
patent: 3934201 (1976-01-01), Majefski
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patent: 4426727 (1984-01-01), Hamada
patent: 4511849 (1985-04-01), Yoshihisa et al.
patent: 4558284 (1985-12-01), Zaidenweber
National Semiconductor, AN20, Feb. 1969, p. AN20-4.
Lancaster, CMOS cookbook, 1979, pp. 221-225.

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