Ring oscillator circuit having output with fifty percent duty cy

Details Ring oscillator circuit having output with fifty percent duty cy Ring oscillator circuit having output with fifty percent duty cy

1994-01-25

1996-01-16

Pascal, Robert J.

Oscillators

Ring oscillators

331 74, 331 75, 331186, 327175, 327309, 327317, 327328, H03B 100

Patent

active

054851262

ABSTRACT:
A ring oscillator circuit which provides an output signal having a substantially constant, fifty (50%) percent duty cycle. The circuit includes a plurality of cascaded inverting stages, each of which has an input circuit for detecting an output voltage of a preceding inverting stage. One inverting stage provides a voltage to an output node. A clamping circuit, coupled to the output node, provides current to the output node whenever the instantaneous voltage output at the output node departs from a threshold voltage of a subsequent logic circuit. The current is such as to clamp the average voltage output to the threshold voltage. The plurality of cascaded inverting stages is coupled to power supply voltage across capacitor configured transistors. The ring oscillator circuit can be employed within a voltage controlled oscillator.

REFERENCES:
patent: 3931588 (1976-01-01), Gehweiler
patent: 4072910 (1978-02-01), Dingwall et al.
patent: 4853654 (1989-08-01), Sakurai
patent: 4891609 (1990-01-01), Eilley
patent: 4908528 (1990-03-01), Huang
patent: 4945262 (1990-07-01), Piasecki
patent: 5061907 (1991-10-01), Rasmussen
patent: 5072197 (1991-12-01), Anderson
patent: 5081428 (1992-01-01), Atriss et al.
patent: 5136260 (1992-08-01), Yousefi-Elezei
patent: 5175512 (1992-12-01), Self
patent: 5289054 (1994-02-01), Lucas
"CMOS Ring Oscillator with Controlled Frequency," IBM Technical Disclosure, vol. 31, #2 Jul., 1988, pp. 154-156.

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