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