A current-mode testable design of operational transconductance amplifier-capacitor filters

Kuen Jong Lee, Wei Chiang Wang, Kou Shung Huang

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Analog filters are important building blocks of many communication and instrumentation systems. However, similar to other analog circuits, testing an analog filter is a difficult problem. In recent years, this problem has become even more difficult because of the increase of circuit complexity. Operational transconductance amplifier-capacitor (OTA-C) filters are especially useful in video applications such as HDTV. In this paper, we first present the design of an OTA-C low-pass filter with a passband from 0 to 4.5 MHz. We then propose a current-mode method for the error detection of this filter. By comparing the current consumed by the circuit under test (CUT) and the current converted from the voltage levels of the CUT, abnormal function of circuit components can be concurrently detected. This technique has been applied to the OTA-C filter and a testable design is obtained. Experimental results show that our design has the following advantages: 1) easy to design and implement; 2) high accuracy in error detection; 3) little impact on the circuit performance of the filter; and 4) high error-detection speed. From an actual layout, we find that the area overhead is about 25% and only one extra pin is needed. -.

Original languageEnglish
Pages (from-to)401-413
Number of pages13
JournalIEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
Volume46
Issue number4
DOIs
Publication statusPublished - 1999 Dec 1

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Operational amplifiers
Capacitors
Error detection
Networks (circuits)
High definition television
Low pass filters
Analog circuits
Communication
Testing
Electric potential

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

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A current-mode testable design of operational transconductance amplifier-capacitor filters. / Lee, Kuen Jong; Wang, Wei Chiang; Huang, Kou Shung.

In: IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, Vol. 46, No. 4, 01.12.1999, p. 401-413.

Research output: Contribution to journalArticle

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