An Energy Efficient Time-Domain Temperature Sensor for Low-Power On-Chip Thermal Management

作者：An Young Jae^*; Ryu Kyungho; Jung Dong Hoon; Woo Seung Han; Jung Seong Ook

来源：IEEE Sensors Journal, 2014, 14(1): 104-110.

DOI：10.1109/JSEN.2013.2280647

• Temperature sensor
• one-point calibration
• process variation
• thermal management
• low power

Because temperature variations significantly affect the performance and reliability of highly integrated chips, the thermal management of such chips is an important issue. In this paper, a time-domain process variation calibrated temperature sensor is proposed for on-chip thermal management. For a suitable on-chip implementation, the digitally converted temperature-dependent time signal is used to reduce the area and power consumption of the chip. The proposed temperature sensor is fabricated using a 0.13-mu m CMOS technology and has an active area of 0.031 mm(2). Measurement results show an energy consumption of 0.67 nJ/conversion at a 430 kHz conversion rate, with 1.2 V supply voltage. Using one-point calibration, the sensing error is found to range from -0.63 degrees C to 1.04 degrees C over a temperature range of 20 degrees C to 120 degrees C.

• 出版日期2014-1