适用于2．5Gb/s光突发接收的高稳定性前置放大器

Design of a highly stable TIA for 2.5Gb/s burst mode optical receiver

设计了一种CMOS三级跨阻抗前置放大器,通过控制开环系统增益达到增加闭环系统稳定性的目的。仿真结果表明,传输速率为25Gb/s时该前置放大器的灵敏度-25．2dBm,动态范围26．2dB,相位裕度在41．1度至89．9度之间变化,稳定性较高。

A three-stage trans-impedance amplifier designed in CMOS technology is presented, which stability can be promoted by varying the gain of open loop system. Sensitivity of -25.2 dBm and dynamic range of 26.2 dB at 2.SGb/s are achieved without stability problems for the phase margin between 41.1 to 89.9 degree.