Ring oscillator and constant voltage generation circuit

Details Ring oscillator and constant voltage generation circuit Ring oscillator and constant voltage generation circuit

1993-11-05

1995-08-29

Pascal, Robert J.

Oscillators

Ring oscillators

331108B, 36518909, H03K 3353

Patent

active

054464188

ABSTRACT:
A ring oscillator according to the invention includes a plurality of inverters cascade-connected between an input node and an output node. Each inverter includes four transistors connected in series between a power supply node and a ground node. A first pair of transistors each have a channel sized to have an input capacitance for delaying the signal of a preceding stage inverter for a prescribed time period. A second pair of transistors are coupled to a current mirror circuit and limits current flowing through the first pair of transistors. Thus, power consumption for obtaining a signal in a prescribed cycle is reduced.

REFERENCES:
patent: 4536720 (1985-08-01), Cranford, Jr. et al.
patent: 4853654 (1989-08-01), Sakurai
patent: 4891609 (1990-01-01), Eilley

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