Monolithic broadband transimpedance amplifiers were developed using GaInP/GaAs single HBTs. The HBTs showed a cut off frequency (f/sub T/) of 60 GHz and maximum oscillation frequency (f/sub max/) of 100 GHz. The fabricated amplifiers had a maximum bandwidth of 19 GHz and an associated transimpedance gain of 47 dB/spl Omega/. The large signal characteristics of two transimpedance amplifier designs with similar gain were also investigated and showed that the cascode approach is much less sensitive to input power level.
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机译：单片宽带跨阻放大器是使用GaInP / GaAs单HBT开发的。 HBT的截止频率（f / sub max /）为60 GHz，最大振荡频率（f / sub max /）为100 GHz。制成的放大器的最大带宽为19 GHz，相关的互阻抗增益为47 dB / spl Omega /。还研究了两种具有相似增益的互阻放大器设计的大信号特性，结果表明，共源共栅方法对输入功率电平的敏感度要低得多。
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