Architecture of High-Efficiency Digitally-Controlled Class-E Power Amplifier
This paper describes the analysis and design of digitally-controlled class-E power amplifiers, which are suitable for fine CMOS implementation. Two methods for implementing digitally-controlled class-E(-like) amplifiers have already been proposed: using NMOS switch arrays or digital PWM. In this paper we analyze the operation and efficiency of these methods, and then we propose combining them to achieve higher efficiency.
Osamu Hanaizumi, Masafumi Unno and Kenta Miura
J. N. Ye et al., "Architecture of High-Efficiency Digitally-Controlled Class-E Power Amplifier", Key Engineering Materials, Vol. 497, pp. 273-284, 2012