Phase detector

Details Phase detector Phase detector

1990-08-10

1992-10-20

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328155, 328151, 307262, 307516, 307514, 331 1A, 331 18, H03D 1300, H03K 906

Patent

active

051573415

ABSTRACT:
A phase detector for a phase locked loop frequency synthesizer, in which frequency-divided signals from a variable frequency oscillator and a reference oscillator are used to trigger respective ramp waveform generators, and a sample pulse generator is arranged to be responsive to the reference ramp waveform to provide sample pulses centered at the mid-point of that ramp waveform to respective sample and hold circuits, the relative phases of the ramp waveforms being determined from the sampled and held voltages.

REFERENCES:
patent: 4216396 (1980-08-01), Balaban et al.
patent: 4305040 (1981-12-01), Koide
patent: 4358736 (1982-11-01), De Boer
patent: 4527277 (1985-07-01), Kosaka et al.
patent: 4775811 (1988-10-01), Okano
patent: 4980653 (1990-12-01), Shepherd
"Frequency Dividers and Synthesisers", Plessey Semiconductors, 1988, pp. 236-245, 306, 312.

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