A CMOS current-mode log(x) and log(1/x) functions generator

Munir A. Al-Absi; Karama M. Al-Tamimi

doi:10.1080/00207217.2013.817022

A CMOS current-mode log(x) and log(1/x) functions generator

Munir A. Al-Absi^*
, Karama M. Al-Tamimi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A novel Complementary Metal Oxide Semiconductor (CMOS) current-mode low-voltage and low-power controllable logarithmic function circuit is presented. The proposed design utilises one Operational Transconductance Amplifier (OTA) and two PMOS transistors biased in weak inversion region. The proposed design provides high dynamic range, controllable amplitude, high accuracy and is insensitive to temperature variations. The circuit operates on a ±0.6 V power supply and consumes 0.3 μW. The functionality of the proposed circuit was verified using HSPICE with 0.35 μm 2P4M CMOS process technology.

Original language	English
Pages (from-to)	1157-1166
Number of pages	10
Journal	International Journal of Electronics
Volume	101
Issue number	8
DOIs	https://doi.org/10.1080/00207217.2013.817022
State	Published - 3 Aug 2014

Bibliographical note

Funding Information:
The authors would like to acknowledge the support of King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia and the Hadhramout Establishment for Human Development, Hadhramout, Yemen. Thanks are extended to Prof. Abuelma′atti for his valuable comments.

Keywords

OTA
current mode
logarithmic function
weak inversion

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1080/00207217.2013.817022

Cite this

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title = "A CMOS current-mode log(x) and log(1/x) functions generator",

abstract = "A novel Complementary Metal Oxide Semiconductor (CMOS) current-mode low-voltage and low-power controllable logarithmic function circuit is presented. The proposed design utilises one Operational Transconductance Amplifier (OTA) and two PMOS transistors biased in weak inversion region. The proposed design provides high dynamic range, controllable amplitude, high accuracy and is insensitive to temperature variations. The circuit operates on a ±0.6 V power supply and consumes 0.3 μW. The functionality of the proposed circuit was verified using HSPICE with 0.35 μm 2P4M CMOS process technology.",

keywords = "OTA, current mode, logarithmic function, weak inversion",

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note = "Funding Information: The authors would like to acknowledge the support of King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia and the Hadhramout Establishment for Human Development, Hadhramout, Yemen. Thanks are extended to Prof. Abuelma′atti for his valuable comments.",

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doi = "10.1080/00207217.2013.817022",

language = "English",

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AU - Al-Tamimi, Karama M.

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PY - 2014/8/3

Y1 - 2014/8/3

N2 - A novel Complementary Metal Oxide Semiconductor (CMOS) current-mode low-voltage and low-power controllable logarithmic function circuit is presented. The proposed design utilises one Operational Transconductance Amplifier (OTA) and two PMOS transistors biased in weak inversion region. The proposed design provides high dynamic range, controllable amplitude, high accuracy and is insensitive to temperature variations. The circuit operates on a ±0.6 V power supply and consumes 0.3 μW. The functionality of the proposed circuit was verified using HSPICE with 0.35 μm 2P4M CMOS process technology.

AB - A novel Complementary Metal Oxide Semiconductor (CMOS) current-mode low-voltage and low-power controllable logarithmic function circuit is presented. The proposed design utilises one Operational Transconductance Amplifier (OTA) and two PMOS transistors biased in weak inversion region. The proposed design provides high dynamic range, controllable amplitude, high accuracy and is insensitive to temperature variations. The circuit operates on a ±0.6 V power supply and consumes 0.3 μW. The functionality of the proposed circuit was verified using HSPICE with 0.35 μm 2P4M CMOS process technology.

KW - OTA

KW - current mode

KW - logarithmic function

KW - weak inversion

UR - https://www.scopus.com/pages/publications/84902357649

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DO - 10.1080/00207217.2013.817022

M3 - Article

AN - SCOPUS:84902357649

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JO - International Journal of Electronics

JF - International Journal of Electronics

IS - 8

ER -

A CMOS current-mode log(x) and log(1/x) functions generator

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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