Digital equipment

Details Digital equipment Digital equipment

1986-07-23

1988-12-06

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 64, 307 87, 307 44, 363 15, 363 16, H02J 700

Patent

active

047897902

ABSTRACT:
Digital equipment such as an electronic computer comprises a memory unit, an operation unit and a processing unit. In the digital equipment, a short-time service interruption compensation means in compact and simple constitution is installed within a power conversion circuit, and a timer circuit to halt each of the equipment in case of service interruption for a long time is provided as a runaway preventing safety means for the equipment. A power conversion device of the digital equipment is composed of a rectifier circuit which rectifies the commercial power source voltage, a battery as a service interruption compensation means which performs floating charge of the rectifier circuit output and discharges the charged DC power source so as to treat service interruption of the commercial power source, and a DC to DC conversion circuit which converts DC current from the rectifier circuit at normal state or from the battery during service interruption in DC-DC conversion. The timer circuit prevents each part relating to electronic computer function from improper operation due to runaway in case of service interruption longer than the charging capacity of the battery, and transmits a halt instruction to each part if the service interruption time extends beyond a definite time.

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Electronic Communication Society, "Electronic Communication Handbook", 1979, title pages & pp. 1305-1306.

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