期刊
IEEE SENSORS JOURNAL
卷 16, 期 1, 页码 43-52出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2015.2478792
关键词
Ring oscillator; power-supply sensitivity; time-to-digital; temperature sensor
资金
- National Science Council of Taiwan [NSC 102-2221-E-017-018]
This paper proposes an all-digital temperature sensor (ADTS) with a ring oscillator for achieving the following goals: 1) high accuracy; 2) high resolution; 3) low power-supply sensitivity; and 4) low cost. The sensor was developed using a 0.18-mu m standard CMOS process with a 1.8-V supply voltage. The measured results indicate that the proposed ADTS generates a Pearson correlation coefficient (R-2) of 0.99998 and an error of -0.851 degrees C to 0.524 degrees C. The resolution is 0.0582 degrees C/LSB, and the power consumption is < 1 mu J for every sample in the temperature range between 0 degrees C and 100 degrees C. Furthermore, the power-supply sensitivity is < 11.67% between the supply voltage variations (+/- 10%), the temperature sensor system occupies an area of similar to 0.0137 mm(2), and the sensor area is only 0.0004 mm(2).
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