Implementation of low-noise switched-capacitor low-pass filter with small capacitance spread

Retdian Nicodimus, Shigetaka Takagi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A design methodology for implementation of low-noise switched-capacitor low-pass filter (SC LPF) with small capacitance spread is proposed. The proposed method is focused on the reduction of operational amplifier noise transfer gain at low frequencies and the reduction of total capacitance. A new SC LPF topology is proposed in order to adapt the correlated double sampling and charge scaling technique at the same time. Design examples show that proposed filter reduces the total capacitance by 65% or more compared to the conventional one without having significant increase in noise transfer gain.

Original languageEnglish
Pages (from-to)477-485
Number of pages9
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE96-A
Issue number2
DOIs
Publication statusPublished - 2013 Feb
Externally publishedYes

Fingerprint

Low pass filters
Capacitors
Capacitance
Operational amplifiers
Topology
Sampling

Keywords

  • Noise transfer function
  • SC filters
  • SC integrators
  • Switched-capacitor circuits

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Graphics and Computer-Aided Design
  • Applied Mathematics
  • Signal Processing

Cite this

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