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Integrated Circuit Module High Temperature Limit Detection

IP.com Disclosure Number: IPCOM000081622D
Original Publication Date: 1974-Jul-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Robbins, GJ: AUTHOR

Abstract

The high-temperature limit sensing technique depicted in the drawing utilizes the negative temperature coefficient of resistance of a thermistor, to detect a change in temperature of coolant liquid in a multichip integrated circuit module. The thermistor and resistor bridge components RX are discrete components mounted on the carrier, whereas the remaining circuitry is on a logic masterslice chip. Except for the circuits necessary for temperature detection on a masterslice chip, the remaining circuits on the masterslice chip may be utilized for regular random-logic functions.

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Integrated Circuit Module High Temperature Limit Detection

The high-temperature limit sensing technique depicted in the drawing utilizes the negative temperature coefficient of resistance of a thermistor, to detect a change in temperature of coolant liquid in a multichip integrated circuit module. The thermistor and resistor bridge components RX are discrete components mounted on the carrier, whereas the remaining circuitry is on a logic masterslice chip. Except for the circuits necessary for temperature detection on a masterslice chip, the remaining circuits on the masterslice chip may be utilized for regular random-logic functions.

The sensing circuit depicted in the drawing is constructed from standard T2L logic gate circuit elements. The differential inputs of the sensing circuit are less susceptible to power supply noise and variations. The circuit is "fail-safe" should the thermistor open. RX is selected such that

RX = R THERMISTOR AT T (temperature) = T LIMIT, and R

THERMISTOR and RX are high enough to minimize the self-heating

of the thermistor.

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