Circuit and method for demodulating a frequency modulated signal

Details Circuit and method for demodulating a frequency modulated signal Circuit and method for demodulating a frequency modulated signal

1977-09-15

1978-05-23

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325349, 329126, H03D 300, H03K 906

Patent

active

040913309

ABSTRACT:
A new and improved circuit and method for demodulating a modulated signal. The circuit of this invention includes a multivibrator switchable from one state to another in response to transitions of a modulated frequency spectrum signal, time delay means coupled between an output terminal of the multivibrator and an input terminal thereof for switching the multivibrator to a second state after a time delay determined by the time delay means, and means for shorting the time delay means after the multivibrator switches state. Thus, the means for shorting out the time delay means allows the multivibrator to be substantially immediately receptive to the next succeeding transition of the input signal.

REFERENCES:
patent: 3502995 (1970-03-01), Cottatellucci et al.
patent: 3745468 (1973-07-01), Allner et al.
patent: 3863161 (1975-01-01), Johnson et al.

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