A −40–125 °C, 0.8 V, 33 kHz relaxation oscillator with integrated voltage and current reference and compensated comparator delay

Wang，Lidan1,2; Zhan，Chenchang1,2; Zhang，Zhaobo1,2,3; Zhao，Shuangxing1,2,3

2021-11-01

10.1016/j.mejo.2021.105285

MICROELECTRONICS JOURNAL   影响因子和分区

0026-2692

1879-2391

This paper presents a novel 33 kHz relaxation oscillator with temperature compensation over −40–125 °C range. The voltage and current references are integrated within the proposed relaxation oscillator, and the resistor used to generate the voltage reference can be omitted. The reference voltage for the comparator input is temperature insensitive, and the temperature coefficient (TC) of the bias current is utilized to compensate the TC of the comparator delay. The proposed oscillator with integrated voltage and current reference and compensated comparator delay is fabricated in a 180-nm CMOS process with an active area of 0.057 mm. The measured average TC of the output frequency is 96.1 ppm/°C for a temperature range of −40–125 °C, and the line sensitivity is 2.6%/V for supply voltage of 0.8–2V. The power consumption is 97 nW when the supply voltage is 0.8V, and the frequency variation is ±0.7%.

Delay Temperature compensation Voltage and current reference —Relaxation oscillator

EI ; SCI

英语

第一 ; 通讯

SZSTI["JCYJ20170817112233337","KQJSCX20180319114406851"]

Engineering ; Science & Technology - Other Topics

Engineering, Electrical & Electronic ; Nanoscience & Nanotechnology

WOS:000710186700006

ELSEVIER SCI LTD

20214211037032

Comparator circuits ; Comparators (optical) ; Relaxation oscillators

Thermodynamics:641.1 ; Oscillators:713.2 ; Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers:713.5 ; Optical Devices and Systems:741.3

ENGINEERING

2-s2.0-85117230349

Scopus

1.School of Microelectronics,The Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
2.The University Key Laboratory of Advanced Wireless Communications of Guangdong Province,Department of Electrical and Electronic Engineering,SUSTech,China
3.State Key Laboratory of Analog and Mixed-Signal VLSI,IME,FST-ECE,University of Macau,999078,China

Wang，Lidan,Zhan，Chenchang,Zhang，Zhaobo,等. A −40–125 °C, 0.8 V, 33 kHz relaxation oscillator with integrated voltage and current reference and compensated comparator delay[J]. MICROELECTRONICS JOURNAL,2021,117.

Wang，Lidan,Zhan，Chenchang,Zhang，Zhaobo,&Zhao，Shuangxing.(2021).A −40–125 °C, 0.8 V, 33 kHz relaxation oscillator with integrated voltage and current reference and compensated comparator delay.MICROELECTRONICS JOURNAL,117.

Wang，Lidan,et al."A −40–125 °C, 0.8 V, 33 kHz relaxation oscillator with integrated voltage and current reference and compensated comparator delay".MICROELECTRONICS JOURNAL 117(2021).