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A 4-GSs 80-dB DR Current-Domain Analog Frontend for Phase-Coded Pulse-Compressio
130nm CMOS工艺下实现的4GS/s电流域模拟前端，用于相位编码脉冲压缩直接飞行时间汽车激光雷达。
4GS/s采样率, 80dB动态范围, 5pA/√Hz输入参考噪声, 0.225m测距误差(1σ)
电流域模拟前端相位编码脉冲压缩直接飞行时间汽车激光雷达
▸4GS/s电流域模拟前端设计
▸200MHz带宽支持200Mb/s突发检测
▸输入直流伺服环路消除背景光电流
Abstract
A 4-GS/s current-domain analog front end
(CurAFE) for phase-coded pulse-compression direct time-of-
flight (dTOF) automotive Lidar has been realized in 130-nm
CMOS. The permissible eye-safe laser energy is transmitted in
the form of a burst of optical sub-pulses. The burst embeds
a phase coding designed to have an auto-correlation function
with a maximum peak-to-sidelobe ratio. The optical reflection
of this burst, reflected from a target, is then detected by an
avalanche photodiode (APD). The APD’