Reset circuit with PNP saturation detector

Details Reset circuit with PNP saturation detector Reset circuit with PNP saturation detector

1990-04-09

1991-11-19

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307300, 307279, 307594, 357 43, 357 44, 357 46, H03K 1720, H03K 1722, H03K 1716, H03K 3013

Patent

active

050668692

ABSTRACT:
A power supply reset circuit with a PNP transistor for detecting saturation of an NPN transistor and resetting a fault latch. The PNP and NPN transistors may be separate, discrete components. A preferred embodiment includes a vertical NPN transistor formed in a semiconductor substrate and includes a base, emitter and collector region. The functional, lateral PNP transistor is also fashioned in the semiconductor substrate and has a base region formed by the collector region of the NPN transistor, an emitter region formed by the base region of the NPN transistor, and a distinct, separate collector region disposed in selected proximity to the base and emitter region of the vertical NPN transistor, forming a saturation detector.

REFERENCES:
patent: 3676714 (1972-07-01), Wensink et al.
patent: 4021687 (1977-05-01), Yoshimura
patent: 4091296 (1978-05-01), Suzuki et al.
patent: 4130827 (1978-12-01), D'Altroy et al.
patent: 4463369 (1984-07-01), Harford

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