A 2 5Gb/s depletion mode GaAs MESFET clock recovery and decision circuit is described,which applies to the optical fiber communication.The circuit consists of a clock recovery circuit,including a preprocessor,phase detector(PD),low pass filter(LPF) and voltage controlled oscillator(VCO) and a decision circuit,including a comparator and a latch.The SPICE simulation result confirms the high frequency 2 5GHz of the clock recovery and the high speed 2 5Gb/s of the decision circuit.The 2 5Gb/s decision circuit has proved to be able to deal with the input signal and produce a digital output signal after it being sampled by a clock signal.
设计并模拟分析了光纤通信用超高速单电源 Ga As判决再生电路 ,采用非掺 SI Ga As衬底直接离子注入、1μm耗尽型 Ga As MESFET、平面电路工艺研制出单片 Ga As判决再生电路。实验测试结果表明 ,该电路可对输入信号进行正确的“0”、“1”判决 ,并经时钟抽样后 ,输出正确的数字信号 ,传输速率可达 2 .8Gbit/s,可用于覆盖 2 .
