A new current mode CMOS variable gain amplifier using a new pseudo-exponential function

M. Sait Altuner; Metin Yazgi; Ali Zeki; Hadi G. Momen; Ali Toker

doi:10.1007/s10470-018-1234-1

A new current mode CMOS variable gain amplifier using a new pseudo-exponential function

M. Sait Altuner, Metin Yazgi^*, Ali Zeki, Hadi G. Momen, Ali Toker

^*Corresponding author for this work

Department of Electronics and Communication Engineering

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

2 Citations (Scopus)

Abstract

In this paper, a new pseudo-exponential function is described and a new CMOS exponential-control variable gain amplifier (VGA) based on the new function is introduced. No multiplier is needed in the proposed approach. The VGA operates in current mode and includes two different stages. The first stage is a simple current amplifier while the second stage is an attenuator. The overall behavior of the stages gives the new pseudo-exponential function. The VGA circuit has been designed and simulated for a 0.18 μ CMOS process. Post layout results show that the circuit has a bandwidth of 164 MHz and a gain range of 32.5 dB between − 21 and + 11.5 dB.

Original language	English
Pages (from-to)	49-57
Number of pages	9
Journal	Analog Integrated Circuits and Signal Processing
Volume	97
Issue number	1
DOIs	https://doi.org/10.1007/s10470-018-1234-1
Publication status	Published - 1 Oct 2018

Bibliographical note

Publisher Copyright:
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.

Funding

Funders	Funder number
Istanbul Teknik Üniversitesi

Keywords

Current mode
Pseudo-exponential gain amplifier
Variable gain amplifier

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10.1007/s10470-018-1234-1

Cite this

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abstract = "In this paper, a new pseudo-exponential function is described and a new CMOS exponential-control variable gain amplifier (VGA) based on the new function is introduced. No multiplier is needed in the proposed approach. The VGA operates in current mode and includes two different stages. The first stage is a simple current amplifier while the second stage is an attenuator. The overall behavior of the stages gives the new pseudo-exponential function. The VGA circuit has been designed and simulated for a 0.18 μ CMOS process. Post layout results show that the circuit has a bandwidth of 164 MHz and a gain range of 32.5 dB between − 21 and + 11.5 dB.",

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AU - Toker, Ali

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A new current mode CMOS variable gain amplifier using a new pseudo-exponential function

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