Motorola Corporation

Marvin A Glazer

Jack L Anderson

Frank J Swiatowiecz

A temperature sensor circuit is disclosed which employs a plurality of semiconductor junctions arranged either in a current-mirror configuration using a bias circuit and current source transistors or in a bridge configuration in order to provide a differential output voltage which is linearly proportional to temperature. The temperature sensor circuit is ideally suited for fabrication as an integrated circuit, and the differential output voltage is relatively insensitive to integrated circuit processing variations as well as power supply variations. By providing a differential output signal, the circuit is particularly useful in high noise environments such as automotive applications.

Modified semiconductor temperature sensor

A dual function capability is incorporated into one input of an emitter coupled logic gate to allow a user to selectively enable the logic circuit to operate in a multifunction mode. The dual function input can recognize both normal binary voltage levels and operate as a conventional input for digital information, and also recognize voltage levels not within the normal binary voltage levels and modify the circuit function correspondingly.

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Tempe, AZ, United States of America

Marvin A Glazer