TY - GEN
T1 - A time domain differential CMOS temperature sensor with reduced supply sensitivity
AU - Law, M. K.
AU - Bermak, A.
PY - 2008
Y1 - 2008
N2 - In this paper, a Time Domain CMOS Temperature Sensor with Differential Temperature Sensing Circuit and Reduced Supply Sensitivity is presented. Differential temperature sensing is achieved by using two delay generators, each for generating positively and negatively proportional to temperature delays respectively. The effective temperature signal can then be increased for quantization. The variation in supply voltage is sensed and converted to bias currents proportional to supply voltage. Temperature error due to 10% supply voltage variation can be reduced to less than ±1°C. A temperature dependent pulse will be generated and then digitized by a ripple counter using an external clock signal. Simulation results show that a ±0.6°C with two-point calibration can be achieved with a temperature variation from 0°C to 100°C. The circuit consumes 12μA and 70μA in static and temperature acquiring mode, respectively, and has a sampling rate of more than 80k samples/s.
AB - In this paper, a Time Domain CMOS Temperature Sensor with Differential Temperature Sensing Circuit and Reduced Supply Sensitivity is presented. Differential temperature sensing is achieved by using two delay generators, each for generating positively and negatively proportional to temperature delays respectively. The effective temperature signal can then be increased for quantization. The variation in supply voltage is sensed and converted to bias currents proportional to supply voltage. Temperature error due to 10% supply voltage variation can be reduced to less than ±1°C. A temperature dependent pulse will be generated and then digitized by a ripple counter using an external clock signal. Simulation results show that a ±0.6°C with two-point calibration can be achieved with a temperature variation from 0°C to 100°C. The circuit consumes 12μA and 70μA in static and temperature acquiring mode, respectively, and has a sampling rate of more than 80k samples/s.
UR - http://www.scopus.com/inward/record.url?scp=51749121541&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2008.4541870
DO - 10.1109/ISCAS.2008.4541870
M3 - Conference contribution
AN - SCOPUS:51749121541
SN - 9781424416844
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 2126
EP - 2129
BT - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
T2 - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
Y2 - 18 May 2008 through 21 May 2008
ER -