Integrable quadrature FM demodulator using fewer signal pins

Details Integrable quadrature FM demodulator using fewer signal pins Integrable quadrature FM demodulator using fewer signal pins

1982-04-22

1984-12-25

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329118, 329137, 329140, 329145, 455214, 455337, H03D 306

Patent

active

044906803

ABSTRACT:
A quadrature type FM demodulator device used, for example, in a television receiver, includes a band pass filter for filtering a sound intermediate frequency (SIF) signal input to the device. The output of the band pass filter is coupled through a filter circuit to an integrated circuit having a limiter amplifier and an FM detector to output a sound signal from the SIF signal.

REFERENCES:
patent: 3997856 (1976-12-01), Canning et al.
patent: 4119919 (1978-10-01), Sugawara
patent: 4144501 (1979-03-01), Togawa et al.
"Toshiba Integrated Circuits Data Book", Tokyo Shibaura Electric Co., Ltd. (Dec. 1977), pp. 87-99.

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