Delay lock loop modulator and demodulator

Details Delay lock loop modulator and demodulator Delay lock loop modulator and demodulator

1980-03-10

1982-01-05

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

329 50, 329110, 329168, 332 29R, H03C 300, H03D 300

Patent

active

043096735

ABSTRACT:
A delay lock loop has a fixed delay element, means for detecting the edge transitions of pulses, analog or digital feedback means related to the timing differences between the edge transitions of a pair of pulses and a variable delay means responsive to the feedback means for adjusting the timing differences between a pair of pulses in response to the feedback signals. In the analog embodiment, the feedback may be a voltage related feedback with a varying voltage controlling a voltage responsive variable delay means. In the digital embodiment, the feedback means may use a counter responsive to signals from an edge detecting flip-flop and the counter may control a programmable delay means.

REFERENCES:
patent: 3221260 (1965-11-01), Henrion
patent: 3393380 (1968-07-01), Webb et al.
patent: 4042884 (1977-08-01), Querry
patent: 4137503 (1979-01-01), Ziesmer

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