Area-efficient RC low pass filter using T-networked resistors and capacitance multiplier

Changho Seok, Kyomuk Lim, Jindeok Seo, Hyeunho Kim, Seunghyun Im, Ji Hoon Kim, Choul Young Kim, Hyoungho Ko

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

A low pass filters (LPFs) are important building blocks for many analog integrated circuit design. The biomedical applications or the sensor applications require the LPFs with very low cut-off frequency. The simplest way to implement the LPF is using the passive RC filter. The passive RC LPF, however, consumes large chip area when the desired time constant is large. The transconductance-C (gm-C) filter or the switched capacitor (SC) filters are widely used to achieve the low cut-off frequency in limited area. However, non-linearity and switching noise are major drawbacks of the g m-C filters and the SC filters. This paper presents an area-efficient LPF using T-networked resistors and current-mode capacitance multiplier. The area of the proposed LPF is reduced to 8.31 % of the conventional passive RC LPF at the same cut-off frequency of 7.1 kHz. The proposed LPF is designed using standard 0.18 μm CMOS process with the option process of high-resistivity polysilicon resistor and metal-insulator-metal capacitor.

Original languageEnglish
Title of host publicationICCAS 2013 - 2013 13th International Conference on Control, Automation and Systems
Pages1308-1311
Number of pages4
DOIs
StatePublished - 2013
Event2013 13th International Conference on Control, Automation and Systems, ICCAS 2013 - Gwangju, Korea, Republic of
Duration: 20 Oct 201323 Oct 2013

Publication series

NameInternational Conference on Control, Automation and Systems
ISSN (Print)1598-7833

Conference

Conference2013 13th International Conference on Control, Automation and Systems, ICCAS 2013
Country/TerritoryKorea, Republic of
CityGwangju
Period20/10/1323/10/13

Keywords

  • T-networked resistors
  • anti-aliasing filter
  • area-efficient low pass filter
  • current-mode capacitance multiplier

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