A double-sampling pseudo-two-path bandpass ΔΣ modulator

Shen Iuan Liu, Chien Hung Kuo, Ruey Yuan Tsai, Jingshown Wu

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A double-sampling pseudo-two-path bandpass ΔΣ modulator is proposed. This modulator has an output rate equal to twice the dock rate, uses n/2 operational amplifier s (op-amps) for an nth-order noise transfer function, and has reduced clock feedthrough in the signal path band. The required clocks can be simpler to implement than the conventional pseudo-two-path techniques. The measured signal-to-noise ratio and dynamic range of the fourth-order double-sampling pseudo-two-path bandpass ΔΣ modulator in a 30-kHz bandwidth at a center frequency of 2.5 MHz (at a clock frequency of 5 MHz) are 62 and 68 dB, respectively.

Original languageEnglish
Pages (from-to)276-280
Number of pages5
JournalIEEE Journal of Solid-State Circuits
Volume35
Issue number2
DOIs
Publication statusPublished - 2000 Feb 1

Keywords

  • Bandpass ΔΣ modulator
  • Double sampling
  • Pseudo-two-path

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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