Ring oscillator

Details Ring oscillator Ring oscillator

1988-12-02

1990-01-02

Laroche, Eugene R.

Oscillators

Ring oscillators

331108A, 331108B, 331135, H03B 100

Patent

active

048916099

ABSTRACT:
A ring oscillator circuit comprises a plurality of inverter states (301, 302, 303) connected in a series loop. Each stage has a voltage input (315, 315', 315") with an associated input capacitance and input threshold voltage, and a current output (316, 316', 316"). An active output circuit regulates the output currents so as to regulate the frequency of oscillation. A single reference circuit (307) can be used by more than one stage. The output circuit can vary the output currents to compensate for variable supply voltages. The oscillator can be used as part of a bias generator in an integrated circuit.

REFERENCES:
patent: 3931588 (1976-01-01), Gehweiler
patent: 4142114 (1979-02-01), Green
patent: 4656369 (1987-04-01), Lou

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