【摘要】 给出了一种新型的低噪声放大器的变增益方案 .与传统的噪声恶化很严重的低噪声放大器变增益方案相比 ,该方案以 3d B为步长 ,可以得到 2 5 d B的变增益范围 ,并且在低增益时的噪声恶化只有 0 .3～ 0 .5 d B.此外 ,这种变增益方案与传统方案相比 ,还有不需要额外功耗的优点更多还原

【Abstract】 A LNA with a novel variable gain solution is presented.Compared with the conventional variable gain solutions of LNA,which have more noise degradations when in low gain mode,this solution gives about 25dB variable gain range in 3dB steps,which would cause ultra low noise figure degradation by 0 3～0 5dB.In addition,extra power consumption is not needed by this solution compared with other solutions.更多还原