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has been cited by the following article:

• TITLE: A 1-GHz, 7-mW, 8-Bit Subranging ADC without Resistor Ladder Using Built-In Threshold Calibration

  AUTHORS: Kenichi Ohhata, Wataru Yoshimura, Daiki Tabira, Futoshi Shimozono, Masataro Iwamoto

  KEYWORDS: Analog-to-Digital Convertor; Subranging Architecture; Resistor Ladder; Foreground Calibration; Offset Drift

  JOURNAL NAME: Circuits and Systems, Vol.5 No.4, March 28, 2014

  ABSTRACT: A subranging analog-to-digital converter (ADC) features high-speed and relatively low-power. The limiting factors of power reduction in subranging ADCs are the resistor ladder and the comparator. We propose an ADC architecture combining a capacitive digital-to-analog convertor and built-in threshold calibration to eliminate the resistor ladder, resulting in a low-power subranging ADC. We also propose a calibration technique comprising of metal-oxide-metal capacitor, MOS switch, and scaling capacitor to reduce the power consumption of the comparator and an offset drift compensation technique to enable precise foreground calibration. We designed an 8-bit, 1-GHz subranging ADC by applying these techniques, and post-layout simulation results demonstrated a power consumption of 7 mW and figure of merit of 51 fJ/conv.-step.