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This paper presents a current-mode VCSEL driver (CMVD) implemented in a 0.18-𝛍m CMOS technology for the applications of short-range LiDAR sensors, where a current-steering logic is exploited to deliver the modulation currents (from 0.1 to 10 mApp) and the bias current of 0.1 mA to the VCSEL diode simultaneously. For simulations, the VCSEL diode is modeled as a 1.6-V forward bias voltage with a 50-Ω series resistor. The post-layout simulations of the proposed CMVD demonstrate vividly large output pulses and clean eye-diagrams. The chip consumes a maximum of 44 mW from a 3.3-V supply and the core occupies the area of 0.1 mm2.
