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A Soft-Error-Tolerant SAR ADC with Dual-Capacitor Sample-and-Hold Control for Sensor Systems

1
School of Electrical Engineering, Korea University, Seoul 02841, Korea
2
Foundry Business, Samsung Electronics, Hwaseong 18448, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Pak Kwong Chan and Holden King-Ho Li
Sensors 2021, 21(14), 4768; https://doi.org/10.3390/s21144768
Received: 4 June 2021 / Revised: 8 July 2021 / Accepted: 9 July 2021 / Published: 13 July 2021
(This article belongs to the Special Issue Advanced Interface Circuits for Sensor Systems)
For a reliable and stable sensor system, it is essential to precisely measure various sensor signals, such as electromagnetic field, pressure, and temperature. The measured analog signal is converted into digital bits through the sensor readout system. However, in extreme radiation environments, such as in space, during flights, and in nuclear fusion reactors, the performance of the analog-to-digital converter (ADC) constituting the sensor readout system can be degraded due to soft errors caused by radiation effects, leading to system malfunction. This paper proposes a soft-error-tolerant successive-approximation-register (SAR) ADC using dual-capacitor sample-and-hold (S/H) control, which has robust characteristics against total ionizing dose (TID) and single event effects (SEE). The proposed ADC was fabricated using 65-nm CMOS process, and its soft-error-tolerant performance was measured in radiation environments. Additionally, the proposed circuit techniques were verified by utilizing a radiation simulator CAD tool. View Full-Text
Keywords: soft-error; radiation-hardened; SAR ADC; sample-and-hold; single event effect; total ionizing dose; sensor system soft-error; radiation-hardened; SAR ADC; sample-and-hold; single event effect; total ionizing dose; sensor system
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MDPI and ACS Style

Ro, D.; Um, M.; Lee, H.-M. A Soft-Error-Tolerant SAR ADC with Dual-Capacitor Sample-and-Hold Control for Sensor Systems. Sensors 2021, 21, 4768. https://doi.org/10.3390/s21144768

AMA Style

Ro D, Um M, Lee H-M. A Soft-Error-Tolerant SAR ADC with Dual-Capacitor Sample-and-Hold Control for Sensor Systems. Sensors. 2021; 21(14):4768. https://doi.org/10.3390/s21144768

Chicago/Turabian Style

Ro, Duckhoon, Minseong Um, and Hyung-Min Lee. 2021. "A Soft-Error-Tolerant SAR ADC with Dual-Capacitor Sample-and-Hold Control for Sensor Systems" Sensors 21, no. 14: 4768. https://doi.org/10.3390/s21144768

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