F-M Demodulator circuit

Details F-M Demodulator circuit F-M Demodulator circuit

1975-06-13

1977-02-08

Kominski, John

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

331113R, H03D 314

Patent

active

040074269

ABSTRACT:
An F-M demodulator circuit including a multivibrator and a differential amplifier that have common output electrodes and a capacitor thereacross demodulates a frequency modulated signal differentially applied to input electrodes of the amplifier. The state of conductivity of the multivibrator reverses at a fixed time after reversal of the state of conductivity of the differential amplifier. The capacitor is charged to opposite polarities alternately, according to the relative states of conductivity of the multivibrator and differentially amplifier, by constant current pulses of equal duration. A pulse signal based on the rate of occurrence of the charging pulses has a duty cycle linearly related to the frequency of the modulating signal, and filtering this pulse signal extracts the modulating signal.

REFERENCES:
patent: 3518575 (1970-06-01), Cottatellucci
patent: 3681702 (1972-08-01), Dann
patent: 3811097 (1974-05-01), Dijkmans
patent: 3855551 (1974-12-01), Ishigaki
patent: 3902140 (1975-08-01), Grebene

Affiliated with

Also associated with

Rating

F-M Demodulator 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 F-M Demodulator circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and F-M Demodulator circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1215528