Pulse generator for IC fabrication

Details Pulse generator for IC fabrication Pulse generator for IC fabrication

1982-06-21

1983-06-14

Griffin, Donald A.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328 34, H03K 508

Patent

active

043885365

ABSTRACT:
The present invention relates to a pulse generator for use at a selected frequency near 100 Khz and having a predetermined duty cycle (typically 20%). The pulse generator is designed for integrated circuit fabrication using a CMOS process. The design utilizes a ring oscillator whose frequency is varied by external adjustment of a single resistance and which utilizes a gating stage responsive to electrical conditions in at least two stages of the ring oscillator to establish the desired duty cycle. The duty cycle may also be adjusted, as by the inclusion of optional stages in the ring oscillator. The design features a low power consumption, and high temperature stability of frequency and duty cycle.

REFERENCES:
patent: 2702853 (1955-02-01), Watson
patent: 2797317 (1957-06-01), Leeds
patent: 2834880 (1958-05-01), Clapper
patent: 2872576 (1959-02-01), Brumbaugh et al.
patent: 3215855 (1965-11-01), Cole et al.

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