Temperature and Supply Voltage Monitoring with Current-mode Relaxation Oscillators

被引：0
|
作者：
Dai, Shanshan [1 ]
Tulloss, Caleb R. [1 ]
Lian, Xiaoyu [1 ]
Hu, Kangping [1 ]
Reda, Sherief [1 ]
Rosenstein, Jacob K. [1 ]
机构：
[1] Brown Univ, Sch Engn, Providence, RI 02912 USA
来源：
2020 IFIP/IEEE 28TH INTERNATIONAL CONFERENCE ON VERY LARGE SCALE INTEGRATION (VLSI-SOC) | 2020年
关键词：
temperature sensor; supply voltage monitor; current reference; thermal sensor; VCO; relaxation oscillator; SENSOR; CMOS;
D O I：
10.1109/VLSI-SOC46417.2020.9344099
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents a new family of temperature and supply voltage sensors based on an improved current-mode relaxation oscillator. The proposed sensor circuit overcomes the finite input impedance of earlier current-mode relaxation oscillators, and it is paired with a novel opamp-free bandgap current reference. Two examples are presented: a V-DD-controlled oscillator, and a temperature-controlled oscillator. The temperature-controlled oscillator operates at 11.3 MHz and consumes 11.14 mu W while reaching a temperature nonlinearity error less than +0.85/-0.94 degrees C, a resolution figure of merit of 11.5 pJ.K-2, and an efficiency of 240 pJ/conv. The V-DD-controlled oscillator has a nonlinearity error less than +28.7/-30.0 mV from 1.2-1.8 V after two-point calibration.
引用
收藏
页码：192 / 197
页数：6
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