A Linearization Technique for CMOS RF Power Amplifier with Programmable Output
A novel linearization technique for CMOS Class AB power amplifiers (PAs) is presented. The presented technique cancels third-order inter-modulation (IMD3) products of the output power which can be achieved by canceling the negative peak and the positive peak of second-order derivative of gm of the main transistor. Using auxiliary transistors in parallel can effectively flatten second-order derivative of gm while little power is consumed. A Class AB power amplifier incorporating this technique is designed at 433MHz with programmable output power level. A two-tone test with frequency spacing of 1MHz has been simulated and the reduction of the IMD3 is at least 10dB.
Zhao Liu Huazhong Yang
Department of Electronic Engineering, Tsinghua University, Beijing, China TNList, Tsinghua Univ., Beijing, China
国际会议
2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)
成都
英文
666-669
2009-07-23（万方平台首次上网日期，不代表论文的发表时间）