Apparatus including a plurality of phase-locked loop circuit ele

Details Apparatus including a plurality of phase-locked loop circuit ele Apparatus including a plurality of phase-locked loop circuit ele

1993-04-21

1994-12-20

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 8, 331 17, 331 34, 331 57, 331108C, 257773, 257786, H03L 706, H03L 7099, H03L 7085

Patent

active

053749014

ABSTRACT:
A phase-locked loop circuit includes a voltage controlled oscillator. A phase comparator compares the phase of the output signal of the voltage control led oscillator with a reference signal. A loop filter to which the output signal of the comparator is applied provides a control signal to the voltage controlled oscillator. The voltage controlled oscillator is formed by interconnecting a plurality of oscillator components according to a desired wiring pattern. Each wiring pattern determines the basic oscillation frequency of the voltage controlled oscillator. A loop filter is formed by interconnecting a plurality of loop filter components according to another wiring pattern. Each wiring pattern determining the time constant of the loop filter. The oscillator components, the wiring pattern interconnectors, the comparator, the loop filter components and its wiring pattern interconnectors are disposed on a single substrate. In another embodiment, a decoder is formed from decoder components, which are interconnected by another selected wiring pattern.

REFERENCES:
patent: 3484932 (1969-12-01), Cook
patent: 4079338 (1978-03-01), Kronlage
"Design of PLL-Based Clock Generation Circuits", by Deog-Kyoon Jeong, et al., IEEE Journal of Solid-State Circuits, vol. SC-22 No. 2, Apr. 1, 1987, pp. 255-261.

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