Electrical transmission or interconnection systems – With nonswitching means responsive to external nonelectrical... – Temperature responsive
Patent
1986-11-04
1987-12-08
Miller, Stanley D.
Electrical transmission or interconnection systems
With nonswitching means responsive to external nonelectrical...
Temperature responsive
307603, 307605, 307607, 307590, 307594, 307597, H03K 513
Patent
active
047120266
ABSTRACT:
A power reset delay circuit is described which when energized provides a delayed output signal a predetermined time interval thereafter and which draws substantially zero current when turned off. The delay circuit comprises a first transistor which when turned on disables the discharge path to a capacitor while enabling the charging of the same through the base-emitter path of a second transistor the emitter of which is connected to the base of a third transistor. A P-type semiconductor ring is formed about the collector of the third transistor and in combination therewith functions as a comparator to provide the output signal when the third transistor saturates due to the charging of the capacitor reducing the voltage level at the base thereof.
REFERENCES:
patent: 2924724 (1960-02-01), Booker, Jr.
patent: 3254242 (1966-05-01), Sillers, Jr.
patent: 3693030 (1972-09-01), Walters
Bingham Michael D.
Miller Stanley D.
Motorola Inc.
Phan Trong Quang
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