基于电容补偿技术的CMOS功率放大器设计

摘要

The linearity of the power amplifier can be effectively improved by use of capacitance-compensation technique. The design of power amplifier using capacitance-compensation technique for 5. 25 GHz WLAN is described. The technique is applied to a full differential two-stage amplifier, and then the input-output matching network is designed. Then the global simulation is completed by the ADS software. The results show that,with 1.8 V supply voltage, the output 1 dB compression point of the improved PA has 5 dB increasement. Finally, the layout of the improved PA is presented.%利用电容补偿技术技术可以有效提高功率放大器的线性度.这垦描述了一种采用电容补偿技术改善线性的5.25GHz WLAN的功率放大器的设计方法,使用CMOS工艺设计了两级全差分放大电路,在此基础上设计输入输出匹配网络,然后使用ADS软件进行整体仿真,结果表明在1.8 V电源电压下,电路改进后与改进前相比较,用来表示功率放大器线性度的输出1dB压缩点提高了5dB.最后给出了功放版图.