A 101.6-dB-SNDR Fully Dynamic Zoom ADC Using Miller-Compensated Floating Inverter Amplifiers

Yohan Choi, Woojin Lee, Sooho Park, Changjoo Kim, Hyundo Jung, Chulwoo Kim

Research output: Contribution to journalArticlepeer-review

Abstract

This brief presents a fully dynamic zoom analog-to-digital converter (ADC) using a Miller-compensated two-stage floating inverter amplifier (MCFIA). Due to the two-stage design, the proposed MCFIA achieves a sufficient gain for a high-resolution delta-sigma modulator design. Compared to the conventional two-stage design, the stability criterion of MCFIA is advantageous in driving bigger sampling capacitors needed to reduce kT/C noise. Moreover, a zoom ADC architecture mitigates the swing range requirement of the MCFIA. A prototype ADC was implemented in a 180-nm CMOS process and achieved a signal-to-noise and distortion ratio (SNDR) of 101.6 dB with an SNDR-based Schreier figure-of-merit of 174.8 dB at a sampling frequency of 2.56 MHz.

Original languageEnglish
Pages (from-to)1
Number of pages1
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
DOIs
Publication statusAccepted/In press - 2024

Bibliographical note

Publisher Copyright:
IEEE

Keywords

  • Analog-to-digital converter (ADC)
  • Capacitors
  • Circuit stability
  • Circuits
  • dynamic amplifier
  • floating inverter amplifier
  • fully dynamic ADC
  • Miller compensation
  • Noise
  • Stability criteria
  • Three-dimensional displays
  • Timing
  • zoom ADC

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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