Delay lock loop modulator and demodulator

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

H - Electricity

03

K

325/16, 328/87

H03K 5/00 (2006.01) H03L 7/00 (2006.01) H04L 7/033 (2006.01)

Patent

CA 1142595

Abstract of the Disclosure A delay lock loop has a fixed delay element, circuitry for detecting the edge transitions of pulses, analog or digital feedback circuitry related to the timing differences between the edge transitions of a pair of pulses and a variable delay device responsive to the feedback circuitry 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 device. In the digital embodiment, the feedback circuitry may use a counter responsive to sig- nals from an edge detecting flip-flop and the counter may control a programmable delay device.

365418

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