Delay circuit oscillator having unequal on and off times

Details Delay circuit oscillator having unequal on and off times Delay circuit oscillator having unequal on and off times

1980-11-26

1983-10-04

Grimm, Siegfried H.

Oscillators

Ring oscillators

307602, 307605, 331111, H03K 303, H03K 3354

Patent

active

044081685

ABSTRACT:
An oscillation circuit for providing an oscillation output having a duty ratio different from 50%. The oscillation circuit is adapted to control, for example, a bootstrap circuit included in an EPROM which is erasable by means of ultraviolet rays. The oscillation circuit is comprised of a depletion type MOS transistor used as a resistance in each CR time constant circuit; the gate and the drain or the gate and the source of each depletion type MOS transistor being connected together and the oscillation circuit comprising a delay circuit having its output positively fed back to its input.

REFERENCES:
patent: 4008406 (1977-02-01), Kawagoe
patent: 4115710 (1978-09-01), Lou
patent: 4122361 (1978-10-01), Clemen et al.
Chang, "Integrated Delay Circuit/Noise Rejection Circuit", IBM Technical Disclosure Bulletin, vol. 16, No. 1, Jun. 1973, pp. 317-318.

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