0.1～4GHz达林顿-共射共基结构的增益模块

A 0.1～4GHz Darlington-Cascode Broadband Gain Block

提出了一种新型电路拓扑结构的增益模块,该增益模块为达林顿-共射共基结构,对其工作原理进行了分析。基于AWR Microwave Office软件的仿真结果表明：达林顿晶体管共射放大电路具有较强的电流放大能力,能有效提高增益;共基放大电路能抑制电路密勒效应,改善电路高频响应。设计了增益模块的版图,用2μm InGaP/GaAs HBT工艺成功流片,测试结果表明：在0.14 GHz频率范围内,该增益模块最大增益为25 dB,最小增益大于13.5 dB,在900 MHz工作频率时,该增益模块的P1dB为20 dBm。

A novel Darlington-Cascode structure gain block is designed and its operation principle is analysed.The simulation results based on AWR Microwave Office show that this structure can achieve a gain expansion for its strong ability of amplifing current,and it can improve the high frequency response with an effective suppression of Miller effect.A gain block with this Darlington-Cascode structure is designed and fabricated based on 2 μm InGaP/GaAs HBT technology.The measurement results show that over 0.1～4 GHz,its power gain can reach up to 25 dB and the minimum power gain is more than 13.5 dB.At 900 MHz operation frequency,its P1dB is 20 dBm.