Design of low-noise switched-capacitor low-pass filters with adaptive configuration

Retdian Nicodimus, Takeshi Shima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Noise and area consumption has been a tradeoff in circuit design. Especially for switched-capacitor filters (SCF), kT/C noise gives a limitation to the minimum value of unit capacitance. In case of SCFs with a large capacitance spread, this limitation will result in a large area consumption due to large capacitors. Charge scaling technique combined with correlated double sampling gives a solution to this problem [18]. However, due to a fixed topology, the conventional designs suffer from lower signal-to-noise ratio (SNR) with small input voltages. When capacitance reduction is less crucial, there is a room to improve the SNR. This paper proposes an SCF with adaptive configuration to improve the SNR at small input signals. The proposed technique can reduce the output noise voltage by 30% for small input signals.

Original languageEnglish
Title of host publication2015 European Conference on Circuit Theory and Design, ECCTD 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479998777
DOIs
Publication statusPublished - 2015 Oct 16
Externally publishedYes
EventEuropean Conference on Circuit Theory and Design, ECCTD 2015 - Trondheim, Norway
Duration: 2015 Aug 242015 Aug 26

Other

OtherEuropean Conference on Circuit Theory and Design, ECCTD 2015
CountryNorway
CityTrondheim
Period15/8/2415/8/26

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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    Nicodimus, R., & Shima, T. (2015). Design of low-noise switched-capacitor low-pass filters with adaptive configuration. In 2015 European Conference on Circuit Theory and Design, ECCTD 2015 [7300033] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCTD.2015.7300033