Noise Considerations in Pulse-Shaping Based TIA Channel Designed for a Pulsed TOF Laser Radar Receiver

In this study a detailed noise analysis and measurements of a time-of-flight (TOF) laser radar front-end amplifier are presented, in which an LC pulse shaper is combined with the non-linear feedback Trans-Impedance Amplifier in order to achieve a low noise and wide dynamic range TOF receiver. The noise of the receiver limits the single shot precision and sensitivity (i.e., the dynamic range at low end) of the receiver channel. It is shown that the proposed technique shapes the noise generated by various components of the front-end. Furthermore, in order to achieve the best possible noise performance, various compromises over different characteristics of the front-end (walk error, bandwidth) are discussed. The proposed front-end amplifier was fabricated as a part of a TOF receiver chip in a 0.35μm standard CMOS process and our measurements show a trans-impedance gain of ∼122dBΩ, a bandwidth of ∼200 MHz, and an input-referred equivalent current noise of ∼60 nA.

Authors:
Baharmast Aram, Kostamovaara Juha

Publication type:
A4 Article in conference proceedings

Place of publication:
Proceedings of the 2018 IEEE Nordic Circuits and Systems Conference (NORCAS) : NORCHIP and International Symposium of System-on-Chip (SoC), 30-31 October 2018, Tallinn, Estonia

Keywords:
dynamic range (DR), laser radar receiver, noise analysis, pulse shaping technique, time-of-flight (TOF), trans-impedance amplifier (TIA), unipolar-to-bipolar conversion

Published:

Full citation:
A. Baharmast and J. Kostamovaara, “Noise Considerations in Pulse-Shaping Based TIA Channel Designed for a Pulsed TOF Laser Radar Receiver,” 2018 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC), Tallinn, Estonia, 2018, pp. 1-6. doi: 10.1109/NORCHIP.2018.8573466

DOI:
https://doi.org/10.1109/NORCHIP.2018.8573466

Read the publication here:
http://urn.fi/urn:nbn:fi-fe201901071478