Biphase detector

Details Biphase detector Biphase detector

1981-02-27

1982-08-10

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329104, 329122, 375 87, 331 23, H03D 318, H03K 900, H04L 2722

Patent

active

043440410

ABSTRACT:
The binary state of each cycle of a biphase modulated input signal is detected by a "D" flip-flop when it is clocked by a locally-generated reference signal. When the binary state of the input signal has a first value at clocking, the reference signal is passed through a first exclusive OR gate unchanged. When the binary state of the input signal has the opposite value, the reference signal is inverted by the same OR gate. The output of the first OR gate and the input signal are applied to a second exclusive OR gate to provide a pulse train having a duty cycle indicative of the phase error between the input signal and the reference signal. The latter pulse train is filtered and used to adjust the phase of the reference oscillator until the phase error is eliminated and the circuit is in balance. The binary state of the flip-flop is indicative of the binary state of the input signal.

REFERENCES:
patent: 3991378 (1976-11-01), Schaefer
patent: 4167760 (1979-09-01), Decker
patent: 4281292 (1981-07-01), Caldarella et al.

Affiliated with

Also associated with

Rating

Biphase detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1533011