CMOS ring oscillator having frequency independent of supply volt

Details CMOS ring oscillator having frequency independent of supply volt CMOS ring oscillator having frequency independent of supply volt

1989-02-15

1990-03-20

Mis, David

Oscillators

Ring oscillators

331108A, H03B 2800

Patent

active

049104713

ABSTRACT:
A CMOS ring oscillator includes an odd number of serially connected inverter stages with each stage comprising a CMOS transistor pair. The output of each stage is taken at the common terminal of the CMOS transistor pair with capacitive means shunting the output of each stage to circuit ground. The input of each stage is applied at the gate of the p-channel transistor. A fixed reference voltage, V.sub.REF, is applied to the gate of each n-channel transistor, whereby the discharge of voltage on the capacitive means through the n-channel transistor is independent of supply voltage.

REFERENCES:
patent: 4015219 (1977-03-01), Kawagoe et al.

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