A 12-bit, 1 MS/s SAR-ADC for a CZT-based multi-channel gamma-ray imager using a new digital calibration method
作者: W. LiuT. WeiL. YangY. Hu
作者单位: 1School of Computer Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P.R. China
2Institut Pluridisciplinaire Hubert CURIEN, Strasbourg, France
刊名: Journal of Instrumentation, 2016, Vol.11 (03)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1748-0221/11/03/P03018
原始语种摘要: The successive approximation register-analog to digital converter (SAR-ADC) is widely used in the CdZnTe-based gamma-ray imager because of its outstanding characteristics of low power consumption, relatively high resolution, and small die size. This study proposes a digital bit-by-bit calibration method using an input ramp signal to further improve the conversion precision and power consumption of an SAR-ADC. The proposed method is based on the sub-radix-2 redundant architecture and the perturbation technique. The proposed calibration algorithm is simpler, more stable, and faster than traditional approaches. The prototype chip of the 12-bit, 1 MS/s radiation-hardened SAR-ADC has been designed and fabricated using the TSMC 0.35 μm 2P4M CMOS process. This SAR-ADC consumes 3 mW power and...
全文获取路径: IOP  (合作)

  • calibration 校准
  • ADC Analog-Digital Conversion
  • SAR Safe Address Register
  • based 基于
  • digital 数字的
  • gamma 伽马
  • multi 多种
  • consumption 消耗
  • channel 槽水道
  • converter 转炉