复合多晶硅双极晶体管DC～3Gb/sLD/EA驱动器

DC～3 Gb/s LD/EA Drivers Using Discrete Double Polysilicon Bipolar Transistors

本文介绍了一种新型LD/EA驱动器 .该驱动器采用四个塑封NPN多晶硅双极晶体管和一个常规硅双极晶体管作为有源器件 ,可以在 2 5Ω负载上产生 5 0mA的调制电流用于直接驱动激光器或在 5 0Ω负载上产生 2 .5V的调制电压用于驱动EA调制器 .该驱动器的工作速率为DC至 3Gb/s,调制电流和偏置电流调节范围分别为 5～ 5 0mA ,上升、下降时间小于 10 0ps.

A novel laser diodes' driver was introduced.Using only 4 discrete NPN double polysilicon bipolar transistors and one conventional silicon bipolar transistor as active devices,the driver can provide 50 mA modulation current to drive laser diodes for a load of 25Ω and can provide 2.5 V modulation voltage to drive EA modulators for a load of 50Ω.The driver has the rise/fall time of less than 100 ps and can be used for bit rate up to 3 Gb/s with the modulation and the bias current of 5～50 mA respectively.