A 1.3-µW −0.3/+0.27°C Inaccuracy Fully-integrated Temperature Sensor Based on a Pre-Charge Relaxation Oscillator for IoT applications

Tan, Yi; Liu, Zexue; Hao, Xiucheng; Shen, Zhengkun; Jiang, Haoyun; Tian, Fan; Liu, Junhua

doi:10.1109/apmc46564.2019.9038760

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…However, their accuracy is generally high. On the other hand, time-domain temperature sensors-as they select digital circuits such as time-to-digital converter (TDC) or frequency-to-digital converter (FDC) [9,10]-can often build most circuits using standard cell libraries, and have strong adaptability, simple structure, small area, and low power consumption. Therefore, it is necessary to determine CMOS temperature sensors with different architectures in advance according to different needs.…”

Section: Introductionmentioning

confidence: 99%

A Temperature-to-Frequency Converter-Based On-Chip Temperature Sensor with an Inaccuracy of +0.65 °C/−0.49 °C

Zhang

Chen

et al. 2023

Sensors

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This paper proposes a temperature sensor based on temperature-frequency conversion using 180 nm CMOS technology. The temperature sensor consists of a proportional-to-absolute temperature (PTAT) current generating circuit, a relaxation oscillator with oscillation frequency proportional to temperature (OSC-PTAT), a relaxation oscillator with oscillation frequency independent of temperature (OSC-CON), and a divider circuit cascaded with D flip-flops. Using BJT as the temperature sensing module, the sensor has the advantages of high accuracy and high resolution. An oscillator that uses PTAT current to charge and discharge capacitors to achieve oscillation, and utilizes voltage average feedback (VAF) to enhance the frequency stability of the oscillator is tested. Through the dual temperature sensing process with the same structure, the influence of variables such as power supply voltage, device, and process deviation can be reduced to a certain extent. The temperature sensor in this paper was implemented and tested with a temperature measurement range of 0–100 °C, an inaccuracy of +0.65 °C/−0.49 °C after two-point calibration, a resolution of 0.003 °C, a resolution Figure of Merit (FOM) of 6.7 pJ/K2, an area of 0.059 mm2, and a power consumption of 32.9 μW.

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Section: Introductionmentioning

confidence: 99%

A Temperature-to-Frequency Converter-Based On-Chip Temperature Sensor with an Inaccuracy of +0.65 °C/−0.49 °C

Zhang

Chen

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…The temperature sensors are designed for the various temperatures based on their applications. In these sensors the sensitive element to the temperature can be the resistor [2], BJT transistor [6][7][8][9], or MOSFET transistor [5,10,11]. Among such sensitive elements to the temperature, MOSFETs have the lowest power consumption and acceptable error.…”

Section: Introductionmentioning

confidence: 99%

A 0.5V 110nW Sensor for Temperature Monitoring of Perishable Foods

Dastanian¹,

Askari²

2021

RADIOENGINEERING

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Real-time monitoring solution is essential for the perishable food to estimate the food quality and to predict its shelf life. In this paper an on-chip temperature sensor which is applicable for UHF RFID passive tag is proposed. MOSFET is used as the sensitive element to the temperature. Since the transistors are biased in sub-threshold region, the power consumption is decreased. To converting proportional-to-absolute-temperature (PTAT) and complimentary-to-absolute-temperature (CTAT) voltages to the digital code, the delay generator and 8-bit ripple counter are utilized. For designing binary counter, a low power and high speed D-flip flap (D-FF) based on gate diffusion input (GDI) technique is employed. The proposed temperature sensor dissipates 110 nW power while the supply voltage is 0.5 V. Simulated in TSMC 0.18 µm CMOS technology, the total chip area is 0.0104 mm 2 and the error is -0.3/0.7°C in the temperature range of -20°C to 10°C.

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A 40.6 ppm/°C 368 nW 10 kHz Relaxation Oscillator with Temperature-Sensor-based Piece-Wise Compensation Technique

Chen

Wang

2022

2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)

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A 1.3-µW −0.3/+0.27°C Inaccuracy Fully-integrated Temperature Sensor Based on a Pre-Charge Relaxation Oscillator for IoT applications

Cited by 5 publications

References 11 publications

A Temperature-to-Frequency Converter-Based On-Chip Temperature Sensor with an Inaccuracy of +0.65 °C/−0.49 °C

A Temperature-to-Frequency Converter-Based On-Chip Temperature Sensor with an Inaccuracy of +0.65 °C/−0.49 °C

A 0.5V 110nW Sensor for Temperature Monitoring of Perishable Foods

A 40.6 ppm/°C 368 nW 10 kHz Relaxation Oscillator with Temperature-Sensor-based Piece-Wise Compensation Technique

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