基于MOSFET的半导体激光器驱动电路设计及其改进

在金属氧化物半导体场效应晶体管(MOSFET)作为开关配合电容充放电实现脉冲功率放大时，输出的脉冲电流受到MOSFET元件性能制约，而且由于分布参数的影响脉冲电流非常容易出现过冲。为了解决这些问题，提出了一种MOSFET互补输出电路，它能提供更快的脉冲关断时间，并且对过冲的产生起到一定抑制作用。经实验证明，改进后电路的输出得到了改善。

Laser Diode Driver Circuit Design and Improvement Based on the MOSFET

Laser diode (LD) driver circuit,which is based on the metal-oxide-semiconductor field-effect transistor (MOSFET) and discharging capacitor, its performance mainly depend on the MOSFET. If the distributed parameter is not perfectly controlled, pulse current output is so distorted that it can not drive the LD.overshoot, even the ringing may occur. We design complementary output circuit to solve this problem, it provides faster pulse-off time, and restrains the overshoot and ringing. Experimental results show that the new circuit improves the output effectively.