Compact supply independent temperature sensor

A temperature sensor has a first transistor with a gate voltage tied to maintain the first transistor in an off state with leakage current flowing through the transistor, the leakage current varying with temperature. A second transistor is coupled to the first transistor and receives a gate voltage...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Kosonocky, Stephen V, Rachala, Ravinder Reddy
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER MEASURING MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS PULSE TECHNIQUE TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	A temperature sensor has a first transistor with a gate voltage tied to maintain the first transistor in an off state with leakage current flowing through the transistor, the leakage current varying with temperature. A second transistor is coupled to the first transistor and receives a gate voltage to keep the second transistor in an on state. A current mirror mirrors the leakage current and supplies a mirrored current used to control a frequency of an oscillator signal varies with the mirrored current. The temperature of the first transistor is determined based the frequency of the oscillator signal.