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Integral Hardware-Software Current Protection

IP.com Disclosure Number: IPCOM000061109D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Kraus, RA Nicolson, KM [+details]

Abstract

This article describes a scheme for use when using solid-state switches to connect an external load to ground whereby the current is detected without the addition of sense elements. If excessive current is detected, the switch is then turned off. When using solid-state switches to connect an external load to ground (ground side switching), it is not always practical to insert a sense element in series with the switch to detect the quantity of current flowing through the switch. Too much current passing through the switch may result in damage to the switch and adjacent components. In the scheme disclosed herein, the current is detected without the addition of sense elements. If excessive current is detected, the switch is turned off. Fig. 1 is a block diagram illustrating the present scheme.