A 366kS/s 400uW 0.0013mm2 frequency-to-digital converter based CMOS temperature sensor utilizing multiphase clock. Kim, K., Lee, H., Jung, S., & Kim, C. In 2009 IEEE Custom Integrated Circuits Conference, pages 203–206, September, 2009.
doi  abstract   bibtex   
The proposed temperature sensor is based on CMOS ring oscillators and a frequency-to-digital converter capable of simple and efficient temperature conversion to digital value. The proposed temperature sensor consumes 400 uW at a conversion rate of 366 kS/s and performs the fastest temperature-to-digital conversion among those introduced in previous work. The whole block occupies 0.0066 mm2 (0.0013 mm2 for temperature sensor). Four multiphase clocks were utilized to enhance the resolution of the sensor 8 times better. After one point calibration, the chip-tochip measurement spread was +2.748degC -2.899degC over the temperature range of -40degC to 110degC.
@inproceedings{kim_366ks/s_2009,
	title = {A 366kS/s 400uW 0.0013mm2 frequency-to-digital converter based {CMOS} temperature sensor utilizing multiphase clock},
	doi = {10.1109/CICC.2009.5280879},
	abstract = {The proposed temperature sensor is based on CMOS ring oscillators and a frequency-to-digital converter capable of simple and efficient temperature conversion to digital value. The proposed temperature sensor consumes 400 uW at a conversion rate of 366 kS/s and performs the fastest temperature-to-digital conversion among those introduced in previous work. The whole block occupies 0.0066 mm2 (0.0013 mm2 for temperature sensor). Four multiphase clocks were utilized to enhance the resolution of the sensor 8 times better. After one point calibration, the chip-tochip measurement spread was +2.748degC -2.899degC over the temperature range of -40degC to 110degC.},
	booktitle = {2009 {IEEE} {Custom} {Integrated} {Circuits} {Conference}},
	author = {Kim, K. and Lee, H. and Jung, S. and Kim, C.},
	month = sep,
	year = {2009},
	keywords = {Important},
	pages = {203--206}
}

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