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Related Experiment Video

Updated: Dec 18, 2025

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A Power-Efficient Radiation Sensor Interface with a Peak-Triggered Sampling Scheme for Mobile Dosimeters.

Hyuntak Jeon1, Injun Choi1, Soon-Jae Kweon1

  • 1School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.

Sensors (Basel, Switzerland)
|June 11, 2020
PubMed
Summary

This study introduces a power-efficient radiation sensor interface for mobile dosimeters. A peak-triggered sampling scheme significantly reduces power consumption by only activating the analog-to-digital converter (ADC) during peak radiation events.

Keywords:
analog-to-digital converter (ADC)mobile dosimeterradiation sensor interfacesilicon photomultiplier (SiPM)

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Area of Science:

  • Electrical Engineering
  • Sensor Technology
  • Low-Power Electronics

Background:

  • Battery-powered mobile dosimeters require low power consumption for long-term radiation monitoring.
  • Conventional radiation sensor interfaces often face challenges with power efficiency and signal distortion.

Purpose of the Study:

  • To propose a novel power-efficient radiation sensor interface for mobile dosimeters.
  • To reduce the power consumption of the analog-to-digital converter (ADC) in radiation sensing applications.

Main Methods:

  • Implementation of a peak-triggered sampling scheme for the ADC.
  • Quantization of the peak analog input signal, representing radiation energy, at a high sampling frequency.
  • Fabrication of the sensor interface using a 0.18-μm complementary metal-oxide-semiconductor (CMOS) process.

Main Results:

  • The proposed sampling scheme reduces ADC operation time, leading to significant power savings.
  • Power consumption is reduced to 21.5% of continuous operation levels under worst-case conditions (radiation input every 10 μs).
  • The fabricated interface consumes only 1.11 mW, demonstrating high power efficiency.

Conclusions:

  • The peak-triggered sampling scheme effectively lowers power consumption in radiation sensor interfaces.
  • This approach avoids signal distortion associated with conventional shapers by directly quantizing peak values.
  • The developed interface is suitable for long-term, battery-powered mobile radiation monitoring applications.