Voltage sequencing circuit for sequencing voltages to an electri

Details Voltage sequencing circuit for sequencing voltages to an electri Voltage sequencing circuit for sequencing voltages to an electri

1978-01-10

1979-04-24

Hix, L. T.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307141, 307242, 307297, 361 83, 361 89, 328259, 307200A, H03K 1760, H03K 1728

Patent

active

041514254

ABSTRACT:
The present invention provides means for sequencing various supply voltages to electronic circuits and devices to thereby protect those circuits and devices from exposure to deleterious voltages. A first transistor switch connects a first voltage source to a first output terminal. A second transistor switch is connected to the control electrode of the first transistor switch. The second transistor switch, when conducting, causes the first transistor switch to conduct. The second transistor switch is turned on by a second voltage source which is connected through a delay circuit to the control electrode of the second transistor switch. The second voltage source also is connected through a diode and capacitor circuit to a second output terminal.

REFERENCES:
patent: 3421087 (1969-01-01), Schunemann et al.
patent: 3575619 (1971-04-01), Frank
patent: 3578983 (1971-05-01), Kondo
patent: 3610948 (1971-10-01), Waaben
patent: 3725675 (1973-04-01), Olsen
patent: 3732442 (1973-05-01), Husbands et al.
patent: 3733498 (1973-05-01), Watson
patent: 3860855 (1975-01-01), Caswell
patent: 3886410 (1975-05-01), Seer, Jr.

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