Clock and data recovery circuits are responsible for fiber communication systems to recovery clock and retime data, which restricts the speed and transmission quality of optical fiber transmission. 时钟数据恢复电路,承担着光纤通信传输系统时钟的恢复与数据的再定时输出,制约着光纤传输系统的速度和传输质量,成为了现今科学家及工程师们研究的重点与热点。