CAJ | 학술논문

用2 μm GaAs HBT工艺实现了12 Gbit/s用于光纤传输系统的限幅放大器.整个系统包括一级输入缓冲、三级放大、一级用于驱动50 Ω传输线的输出缓冲和失调电压补偿回路4个部分.采用双电源供电,正电源为2 V,负电源为-2 V,功耗为280 mW.小信号增益大于46 dB,输入信号比特率为12 Gbit/s时,在输出电压幅度保持恒定(单端峰峰值400 mV)的条件下,输入动态范围约为40 dB,眼图性能良好.芯片面积为1.15 mm ×0.7 mm.
용2 μm GaAs HBT공예실현료12 Gbit/s용우광섬전수계통적한폭방대기.정개계통포괄일급수입완충、삼급방대、일급용우구동50 Ω전수선적수출완충화실조전압보상회로4개부분.채용쌍전원공전,정전원위2 V,부전원위-2 V,공모위280 mW.소신호증익대우46 dB,수입신호비특솔위12 Gbit/s시,재수출전압폭도보지항정(단단봉봉치400 mV)적조건하,수입동태범위약위40 dB,안도성능량호.심편면적위1.15 mm ×0.7 mm.
A 12 Gbit/s limiting amplifier for fiber-optic transmission system is realized in a 2 μm GaAs HBT technology. The whole circuit consists of an input buffer, t hree similar amplifier cells, an output buffer for driving 50 Ω transmission li nes and a pair of feedback networks for offset cancellation. At a positive suppl yvoltage of 2 V and a negative supply voltage of -2V, the power dissipation is about 280 mW. The small-signal gain is higher than 46 dB and the input dynamic range is about 40 dB with a constant single-ended output voltage swing of 400 m V. Satisfactory eye-diagrams are obtained at the bit rate of 12 Gbit/s limited by the test set-up. The chip area is 1.15 mm×0.7 mm.