Abstract
This paper presents an optoelectronic receiver (Rx) IC with an on-chip avalanche photodiode (APD) realized in a 0.18-μm CMOS process for the applications of home-monitoring light detection and ranging (LiDAR) sensors, where the on-chip CMOS P+/N-well APD was implemented to avoid the unwanted signal distortion from bondwires and electro-static discharge (ESD) protection diodes. Various circuit techniques are exploited in this work, such as the feedforward transimpedance amplifier for high gain, and a limiting amplifier with negative impedance compensation for wide bandwidth. Measured results demonstrate 93.4-dBΩ transimpedance gain, 790-MHz bandwidth, 12-pA/√Hz noise current spectral density, 6.74-μApp minimum detectable signal that corresponds to the maximum detection range of 10 m, and 56.5-mW power dissipation from a 1.8-V supply. This optoelectronic Rx IC provides a potential for a low-cost low-power solution in the applications of home-monitoring LiDAR sensors.
Highlights
Light detection and ranging (LiDAR) sensors have been proliferated for the past decade because they can be applied to diverse fields such as 3-dimensional imaging for unmanned self-driving cars, and medical and industrial applications [1]
light detection and ranging (LiDAR) sensors can be a potential solution for home-monitoring elder-care systems because they can inherently provide strong immunity against RF interferences, small form-factor, and blurred images for the sake of portrait right protection [2]
Figure shows the simulated frequency response where the width of 795 MHz, and the average input-referred noise current spectral density of 10.2 feedforward achieves the differential transimpedance gain of dBΩ, the bandwidth pA/√Hz which leads to the input referred root-mean-square (RMS) noise current of√287 of 795 MHz, and the average input-referred noise current spectral density of 10.2 pA/ Hz nArms
Summary
Light detection and ranging (LiDAR) sensors have been proliferated for the past decade because they can be applied to diverse fields such as 3-dimensional imaging for unmanned self-driving cars, and medical and industrial applications [1]. LiDAR sensors can be a potential solution for home-monitoring elder-care systems because they can inherently provide strong immunity against RF interferences, small form-factor, and blurred images for the sake of portrait right protection [2]. In these LiDAR sensors, avalanche photodiodes (APDs) are mostly exploited as an off-chip optical detector. 1 shows thethe block diagram of aoftypical linear-mode system, where thethe consists a photodiode light detection, a transimpedance amplifier (TIA).
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