Analysis of envelope signal injection for improvement of RF amplifier intermodulation distortion

Autor:	Vincent W. Leung, Lawrence E. Larson, Prasad S. Gudem, Junxiong Deng
Rok vydání:	2004
Předmět:	Physics Adaptive bias Materials science Amplifier RF power amplifier Volterra series Linearity Signal Distortion Electronic engineering Electrical and Electronic Engineering Direct-coupled amplifier Envelope (waves) Intermodulation
Zdroj:	CICC
DOI:	10.1109/cicc.2004.1358755
Popis:	Adaptive bias techniques based on envelope signal power detection have been proposed for linearity enhancement and dc current reduction in RF amplifiers. Experimental results show an improvement in amplifier linearity, although asymmetric intermodulation distortion (IMD) was observed. This work rigorously studies the effects of the envelope signal injection on amplifier distortion using the Volterra series formulations. The results intuitively explain the spectral regrowth asymmetry, and point to a design technique in which third-order IMD can be optimally cancelled. The theory was verified through comparison to measurement and simulation results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecb8ef59db79f122586ddd6e0246caed https://doi.org/10.1109/cicc.2004.1358755 Zobrazit plný text záznamu