FM demodulator with impulse noise elimination circuit

Details FM demodulator with impulse noise elimination circuit FM demodulator with impulse noise elimination circuit

1984-10-30

1986-11-11

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329134, 455223, 455309, 455312, 358336, 358167, H03D 300, H04N 5213

Patent

active

046225200

ABSTRACT:
An apparatus for demodulating a frequency modulated input signal having a carrier signal component, including a filter for allowing only signals having frequency around the frequency of the carrier signal component and a demodulator connected to the filter for performing frequency demodulation, is provided with a noise eliminating circuit at a stage immediately before the filter. With this provision, an impulse noise having spectrum components of very wide band and which could not be rejected by the filter in prior art apparatuses, is eliminated before the demodulation.

REFERENCES:
patent: 3671867 (1972-06-01), Schwarz
patent: 4151471 (1979-04-01), Packard et al.
patent: 4462048 (1984-07-01), Ross

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