<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The work reports on the design and performance of a low-noise low-cost CMOS transimpedance amplifier (TIA). The proposed circuit shall be employed in optical time-domain reflectometers and is implemented using an affordable 0.18 µm 1.8 V CMOS process. The approach preserves the benefits of a classical feedback structure while addressing the noise problem of conventional feed-forward and resistive feedback architectures via the usage of noise-efficient capacitive feedback. Circuit-level modifications are proposed to mitigate the voltage headroom and DC current issues. The suggested design achieves a total gain of 82 dBΩ (79 dBΩ after the output buffer) within the bandwidth of 1.2 GHz while operating with a total input capacitance of 0.7 pF. The simulated average input-referred noise current density is below 1.8 pA/sqrt(Hz) with the power consumption of the complete amplifier including the output buffer being 21 mW.</p></abstract>

The work reports on the design and performance of a low-noise low-cost CMOS transimpedance amplifier (TIA). The proposed circuit shall be employed in optical time-domain reflectometers and is implemented using an affordable 0.18 µm 1.8 V CMOS process. The approach preserves the benefits of a classical feedback structure while addressing the noise problem of conventional feed-forward and resistive feedback architectures via the usage of noise-efficient capacitive feedback. Circuit-level modifications are proposed to mitigate the voltage headroom and DC current issues. The suggested design achieves a total gain of 82 dBΩ (79 dBΩ after the output buffer) within the bandwidth of 1.2 GHz while operating with a total input capacitance of 0.7 pF. The simulated average input-referred noise current density is below 1.8 pA/sqrt(Hz) with the power consumption of the complete amplifier including the output buffer being 21 mW.

A 79 dBΩ 1.2 GHz Low-Noise Single-Ended CMOS Transimpedance Amplifier for High-Performance OTDR Applications

Department of Computer Science and Communication Technologies

Micro and Nanoelectronics System Design and Research Laboratory

Electrical, Control and Communication Engineering

This work is licensed under the Creative Commons Attribution 4.0 Public License.

The work reports on the design and performance of a low-noise low-cost CMOS transimpedance amplifier (TIA). The proposed circuit shall be employed in optical...

A 79 dBΩ 1.2 GHz Low-Noise Single-Ended CMOS Transimpedance Amplifier for High-Performance OTDR Applications

Published Online: Mar 20, 2020

Page range: 113 - 118

DOI: https://doi.org/10.2478/ecce-2019-0015

Keywords
Analog integrated circuits, broadband amplifiers, CMOS integrated circuits, optical time-domain reflectometry, transimpedance amplifier

© 2019 Agata Romanova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 Public License.

A 79 dBΩ 1.2 GHz Low-Noise Single-Ended CMOS Transimpedance Amplifier for High-Performance OTDR Applications

Published Online: Mar 20, 2020

Page range: 113 - 118

DOI: https://doi.org/10.2478/ecce-2019-0015

KeywordsAnalog integrated circuits, broadband amplifiers, CMOS integrated circuits, optical time-domain reflectometry, transimpedance amplifier

© 2019 Agata Romanova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 Public License.

Keywords
Analog integrated circuits, broadband amplifiers, CMOS integrated circuits, optical time-domain reflectometry, transimpedance amplifier