【摘要】 分析表明,激光雷达具有速度快、精度高、受光照条件影响小等优点,在面向无人驾驶应用中受到了广泛的关注。其中高速激光驱动电路是实现高精度探测的关键。提出一种集成了欠压锁定和过温保护功能的高速单通道低侧驱动器,用于驱动GaNHEMT来发射激光脉冲。在0.18μm TSMC BCD工艺下完成了电路设计,最后给出了芯片的仿真结果。仿真结果表明,输出脉冲波上升下降时间小于200ps,可以输出的脉冲宽度小于2ns,输入到输出的延迟小于2ns,可以适用于车载激光雷达应用。更多还原

【Abstract】 Lidar has the advantages of fast speed, high accuracy, and little impact on light conditions, and has received extensive attention in unmanned driving applications. Among them, the high-speed laser drive circuit is the key to high-precision detection. This paper proposes a high-speed single-channel low-side driver that integrates under-voltage lockout and over-temperature protection functions to drive Ga N HEMTs to emit laser pulses. The circuit is designed under the 0.18μm TSMC BCD process, and simulation results of the chip are given. The simulation results show that the rise and fall time of the output is less than 200 ps, the minimum pulse width of output is 2 ns, and the delay from input to output is less than 2 ns, which can be suitable for automotive lidar applications.更多还原