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

Retdian Nicodimus; Takeshi Shima

doi:10.1109/ECCTD.2015.7300033

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

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	2015 European Conference on Circuit Theory and Design, ECCTD 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)	9781479998777
DOIs	https://doi.org/10.1109/ECCTD.2015.7300033
Publication status	Published - 2015 Oct 16
Externally published	Yes
Event	European Conference on Circuit Theory and Design, ECCTD 2015 - Trondheim, Norway Duration: 2015 Aug 24 → 2015 Aug 26

Other

Other	European Conference on Circuit Theory and Design, ECCTD 2015
Country/Territory	Norway
City	Trondheim
Period	15/8/24 → 15/8/26

ASJC Scopus subject areas

Hardware and Architecture
Electrical and Electronic Engineering

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10.1109/ECCTD.2015.7300033

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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., European Conference on Circuit Theory and Design, ECCTD 2015, Trondheim, Norway, 15/8/24. https://doi.org/10.1109/ECCTD.2015.7300033

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title = "Design of low-noise switched-capacitor low-pass filters with adaptive configuration",

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.",

author = "Retdian Nicodimus and Takeshi Shima",

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doi = "10.1109/ECCTD.2015.7300033",

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booktitle = "2015 European Conference on Circuit Theory and Design, ECCTD 2015",

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N2 - 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.

AB - 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.

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

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