CMOS-Integrated Temperature Relay Based on Widlar Mirror

Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 195)

Abstract

One presents a new variant of temperature relay scheme for CMOS chips, based on a simple structure of voltage source with two cross-connected current mirrors (of modified-Widlar type and simple one). In this scheme the positive feedback is exploited which is designed so that, for a particular temperature the circuit toggles. In this moment his output voltage achieves a level jump, great enough to drive an interface circuit with the relay-signalisation processing part. The relay toggle condition is deduced, which clears up the relay function. The releasing temperature may be programmed in a large range through one or two resistors. The simulation results are presented for the relay conceived in 0.35μm CMOS process. The releasing-temperature process variation is reduced, by a special design procedure, to a maximum value of ±5.5oC.

Keywords

CMOS temperature relay modified Widlar mirror 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.“Politehnica” University of TimişoaraTimisoaraRomania
  2. 2.“Aurel Vlaicu” University of AradAradRomania

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