Demodulators – Frequency modulation demodulator – Input signal split into plural signals
Patent
1996-12-24
1998-12-15
Grimm, Siegfried H.
Demodulators
Frequency modulation demodulator
Input signal split into plural signals
329343, 455214, 455337, H03D 302
Patent
active
058501614
ABSTRACT:
A frequency modulation (FM) signal demodulating circuit having a simple structure using general digital devices is provided. The FM signal demodulating circuit according to the present invention includes a first pulse generator for generating a pulse signal having a predetermined pulse width at every rising edge of the input FM signal, a second pulse generator for generating a pulse signal having a predetermined pulse width at every falling edge of the input FM signal, a combining portion for combining the pulse signals generated in the first pulse generator and the second pulse generator, and a low-pass filter for performing a low-pass filtering operation by receiving a combined pulse signal generated in the combining portion and outputting a signal having a magnitude corresponding to the frequency of the input FM signal.
The FM signal demodulating circuit according to the present invention has a simple structure.
REFERENCES:
patent: 3244991 (1966-04-01), Hofmann
patent: 4504792 (1985-03-01), Furihata
patent: 4614912 (1986-09-01), Moberg
patent: 4800338 (1989-01-01), Yoshizawa et al.
patent: 4839606 (1989-06-01), Hallock
Grimm Siegfried H.
Samsung Electronics Co,. Ltd.
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