FM demodulation circuit

Details FM demodulation circuit FM demodulation circuit

1988-07-19

1989-11-28

Laroche, Eugene R.

Demodulators

Frequency modulation demodulator

Input signal split into plural signals

329343, H03D 100

Patent

active

048840378

ABSTRACT:
A FM demodulation circuit contains an analog-to-digital converter which converts an inputted frequency-modulated (FM) signal into a digital signal of one bit at a timing based on the predetermined clock signal and a differentiation circuit which differentiates the digital signal to thereby output a pulse train whose pulse density is in proportion to a frequency of the inputted FM signal. When the pulse train is supplied to a low-pass filter, the pulse train is converted into an analog signal, which is outputted as a demodulated signal. When the pulse train is supplied to a decimation circuit which includes a weight function generating portion and an accumulator, weighted function values are sequentially accumulated based on the level of the pulse train in the predetermined period so that the demodulated signal can be obtained in the form of a linear pulse code modulated (linear PCM) signal.

REFERENCES:
patent: 3778727 (1973-12-01), Williams
patent: 4243977 (1981-01-01), Everard

Affiliated with

Also associated with

Rating

FM demodulation circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with FM demodulation circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FM demodulation circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-584725