【摘要】 采用CMOS工艺 ,针对超外差结构的无线宽带接收器 ,提出了一个新结构的可变增益放大器 ,并对该放大器进行了仿真和测试 .测试和仿真结果表明 :该放大器能够工作在 5 0～ 6 0 0MHz的频率上 ,增益为 - 2 8～ 4 2dB ,最大增益的噪声系数为 7 6 5dB ,最小增益的IIP3为 2 0dBm ,而且具有良好的鲁棒性 ,在 3V的电源电压下 ,电流消耗只有 12mA .更多还原

【Abstract】 A CMOS novel variable gain amplifier (VGA) suitable for wireless broadband receiver with superheterodyne architecture is presented.The prototype chip is implemented in TSMC 0 18μm technology.Simulations and measurements show that the VGA’s gain control range is -28～42dB;the operation frequency is up to 600MHz;the minimum noise figure (NF) is 7 65dB,and the IIP3 at the minimum gain setting is 20dBm.The VGA dissipates 12mA under a single 3V power supply.更多还原