Digital integrated circuit propagation delay time controller

Details Digital integrated circuit propagation delay time controller Digital integrated circuit propagation delay time controller

1984-08-24

1987-02-03

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307455, 307480, 307526, 307595, 307597, 307608, 328128, H03K 526

Patent

active

046410481

ABSTRACT:
A propagation delay time controller comprises a phase locked ring oscillator and a bias signal generator for controlling the propagation delay time of logic elements on an integrated circuit. The logic elements are of a type in which propagation delay time is a function of an applied bias signal. The ring oscillator, comprising representative logic elements on the controlled integrated circuit, oscillates with a frequency dependent on the propagation delay time of the oscillator logic elements. The bias signal generator compares the oscillator output voltage with a known, pulsed reference signal and generates a bias signal proportional to the integral of the phase difference between the oscillator and reference signal pulses. The bias signal is applied to all logic elements in the ring oscillator and to all other logic elements on the integrated circuit to be controlled. The bias signal thus holds propagation delay time in each controlled logic element to a value fixed by the frequency of the reference signal.

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patent: 4346343 (1982-08-01), Berndlmaier et al.
patent: 4365207 (1982-12-01), Fukuchi
patent: 4494021 (1985-01-01), Bell et al.
patent: 4514647 (1985-04-01), Shoji

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