External oscillator‐less TDC‐based all‐digital temperature sensor

External oscillator‐less TDC‐based all‐digital temperature sensor

This paper presents a Time‐to‐Digital Converter (TDC)‐based all‐digital temperature sensor with small inaccuracy even at wide temperature range. The proposed sensor utilized CMOS inverters show different temperature characteristics to embed an oscillator that previous sensors have used as external c...

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Veröffentlicht in:Electronics and communications in Japan 2019-05, Vol.102 (5), p.11-18
Hauptverfasser: Shimada, Hideto, Mizuno, Kentaro
Format: Artikel
Sprache:eng
Schlagworte:
CMOS
Converters
diode
high‐temperature operation
in‐vehicle sensor
Sensors
temperature sensor
Temperature sensors
Time‐to‐Digital Converter
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Zusammenfassung:This paper presents a Time‐to‐Digital Converter (TDC)‐based all‐digital temperature sensor with small inaccuracy even at wide temperature range. The proposed sensor utilized CMOS inverters show different temperature characteristics to embed an oscillator that previous sensors have used as external component. Moreover, the temperature characteristic of a diode is used to improve the temperature inaccuracy. The sensor in 180‐nm CMOS process tested from −40°C to 200°C shows −2.56°C to +2.84°C inaccuracy.
ISSN:1942-9533
1942-9541
DOI:10.1002/ecj.12161