A low noise, wide dynamic range TOF laser radar receiver based on pulse shaping techniques
Baharmast, Aram; Ruotsalainen, Tarmo; Kostamovaara, Juha (2018-05-04)
A. Baharmast, T. Ruotsalainen and J. Kostamovaara, "A Low Noise, Wide Dynamic Range TOF Laser Radar Receiver Based on Pulse Shaping Techniques," 2018 IEEE International Symposium on Circuits and Systems (ISCAS), Florence, 2018, pp. 1-5. doi: 10.1109/ISCAS.2018.8351606
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A time of flight (TOF) laser radar receiver based on unipolar-to-bipolar pulse shaping at its input is presented. The pulse shaping and the non-linear feedback of the transimpedance preamplifier give low timing error and jitter over a wide input pulse amplitude range. This receiver is realized in a 0.35μm CMOS technology and intended to be used in laser ranging with laser pulses of width ~1ns. Post-layout simulations show a dynamic range of more than 1:200000, a trans-impedance gain of 117dbΩ, a bandwidth of 260MHz and an input-referred equivalent current noise of 70nA. These results are achieved while keeping the walk error less than ±55ps (9mm) without any need for complicated calibration methods.
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