Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)

An Inductorless Variable-Gain Transimpedance Amplifier Design for 4GHz Optical Communication using 0.18-æm CMOS

Authors
Lee Bai Song, Tan Yung Sern, Bharatha Kumar Thangarasu, Kiat Seng Yeo
Corresponding Author
Lee Bai Song
Available Online December 2016.
DOI
10.2991/cnct-16.2017.30How to use a DOI?
Keywords
Automatic gain control circuit (AGC), Bandwidth enhancement, Optical receiver, Regulated cascode (RGC), Transimpedance amplifier (TIA), Variable gain feedback
Abstract

This paper presents a novel variable-gain inductorless transimpedance amplifier (TIA) design using Global Foundries 0.18-æm CMOS technology which is suitable for high speed optical communication. A modified-RGC (M-RGC) preamplifier stage is used to reduce the input impedance through cascode and parallel PMOS transistor techniques for wideband operation. The amplifier stage uses common source amplifiers to increase the gain and an interleaving feedback technique to increase the bandwidth. The amplifier stage also has variable open-loop and resistive close-loop control mechanisms to vary the gain depending on the input signal strength without causing instability or a decrease in bandwidth. The proposed TIA has a transimpedance gain range of 45.4 dB to 62.2 dB for a dynamic range from0.2æApp to 600 æApp. It has a bandwidth above 4.3 GHz throughout this range and a core dcpower consumption of 7.72 mW (total dc power with buffer is9.48 mW) for 1.8 V supply voltage.

Copyright
© 2017, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)
Series
Advances in Computer Science Research
Publication Date
December 2016
ISBN
10.2991/cnct-16.2017.30
ISSN
2352-538X
DOI
10.2991/cnct-16.2017.30How to use a DOI?
Copyright
© 2017, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Lee Bai Song
AU  - Tan Yung Sern
AU  - Bharatha Kumar Thangarasu
AU  - Kiat Seng Yeo
PY  - 2016/12
DA  - 2016/12
TI  - An Inductorless Variable-Gain Transimpedance Amplifier Design for 4GHz Optical Communication using 0.18-æm CMOS
BT  - Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)
PB  - Atlantis Press
SP  - 221
EP  - 230
SN  - 2352-538X
UR  - https://doi.org/10.2991/cnct-16.2017.30
DO  - 10.2991/cnct-16.2017.30
ID  - Song2016/12
ER  -