Circuit card with soft power switch

Details Circuit card with soft power switch Circuit card with soft power switch

1978-12-26

1981-01-13

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Impedance insertion

361 9, 361111, H02H 720

Patent

active

042452708

ABSTRACT:
A circuit card is disclosed of the type for connection to a system by means of connector pins on the card. The circuit card includes a soft power switch for reducing the power transient effects of inserting the card by gradually coupling the circuit load on the card to the system power supply voltage. Connector pins of various extensions are used to initiate events in the coupling of the circuit load to the power supply voltage. The card further includes logic which causes the circuit load to be gradually decoupled from the power supply upon removal of the card from the system.

REFERENCES:
patent: 3935511 (1976-01-01), Boulanger et al.
patent: 3935527 (1976-01-01), Michelet et al.
patent: 3993935 (1976-11-01), Phillips et al.
patent: 4079440 (1978-03-01), Ohnuma et al.

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