A pulse width-controlled CMOS laser diode pulser and a time-gated time-resolved SPAD array transceiver chip for diffuse optics
Pakaslahti, Marko; Nissinen, Jan; Nissinen, Ilkka (2020-10-09)
M. Pakaslahti, J. Nissinen and I. Nissinen, "A Pulse Width-Controlled CMOS Laser Diode Pulser and a Time-Gated Time-Resolved SPAD Array Transceiver Chip for Diffuse Optics," 2020 European Conference on Circuit Theory and Design (ECCTD), Sofia, Bulgaria, 2020, pp. 1-4, doi: 10.1109/ECCTD49232.2020.9218361
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https://urn.fi/URN:NBN:fi-fe20201210100149
Tiivistelmä
Abstract
A pulse width-controlled CMOS pulser for a semiconductor laser diode (LD) and a time-gated time-resolved 8×4 single-photon avalanche diode array with a time-to-digital converter (TDC) were designed on a single integrated circuit and simulated by using a 150 nm technology. The pulse width of the driving current can be adjusted from 0.5 ns to 2.5 ns with a resolution of 100 ps. The start time of the time-gating can be adjusted over a dynamic range of 4.8 ns with a resolution of 100 ps and, furthermore, a 121 ps time-gating can be achieved. The returning photons are detected by the TDC with a resolution of 50 ps and stored to the 128 14-bit counters for merging to the distribution time-of-flight histogram. The average power consumption of the whole system was 377 mW at a repetition rate of 10 MHz.
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