Voltage transient protection circuit

Details Voltage transient protection circuit Voltage transient protection circuit

1989-05-22

1990-10-16

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

307 66, 365229, H22H 318

Patent

active

049640119

ABSTRACT:
A voltage transient protection circuit is provided for protecting a memory device such as a solid state memory cartridge from an undesired control signal which may occur during voltage transients in the primary supply voltage for such memory device. A transient detector detects transients occurring in the primary supply voltage. An isolation circuit is provided in the control bus, such isolation circuit being activated when a transient in the primary supply voltage is detected. A secondary voltage source supplies voltage to the transient detector and the isolation circuit sufficiently long while the primary voltage is fluctuating during a transient to permit the isolation circuit to isolate the control signal(s)el from said memory device.

REFERENCES:
patent: 4587640 (1986-05-01), Scitoh
patent: 4750040 (1988-06-01), Hakamada
Specifications Of The SRAM IC Memory Card; Epson America, Inc. 8K-512 Bytes; Mar., 1987, Revised Jan. 1988.
Mitsubishi HR MELCARD, Spec. Sheet for Static Ram Cards, MF3128, MF 3256 and MF3512, Copyright 1987.

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