Linearization of Power Amplifier using the Modified Feed Forward MethodMotavalli MR1* and Solbach K2
- *Corresponding Author:
- Motavalli MR
Department of Communication Technique
Faculty of Engineering, University of Qom
Tel: +98 25 3210 3732
E-mail: [email protected]
Received date: January 24, 2017; Accepted date: February 20, 2017; Published date: February 27, 2017
Citation: Motavalli MR, Solbach K (2017) Linearization of Power Amplifier using the Modified Feed Forward Method. J Textile Sci Eng 6:286. doi: 10.4172/2165- 8064.1000286
Copyright: © 2017 Motavalli MR, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
A modified circuit for improving linearization of power amplifier based on the model of the Feed Forward circuit amplifier is proposed. With the help of mathematical model for the single power amplifier, the circuit is simulated and a demonstrator is fabricated and measured complex Taylor series are used for modeling the power amplifier by the approximation of the amplitude transfer function and the level-dependence of the transmission-phase of the power amplifier. This can be understood as a simplified form of volterra series. In our proof of concept experiment, we verified the concept but also found that the adjustment of the circuit is critically dependent on the drive conditions and linearization is achieved only for a narrow range of drive power. The proposed circuit in compared with the conventional Feed Forward amplifier in addition a significant increase in efficiency, to minimize the power of the distortion signal 3IMD-products at high drive levels.