ZVS operating frequency versus duty ratio of class E amplifier with nonlinear shunt capacitance

Author

Suetsugu, Tadashi ; Kazimierczuk, Marian K.

Author_Institution

Dept. of Electron. Eng. & Comput. Sci., Fukuoka Univ., Fukuoka

fYear

2008

fDate

18-21 May 2008

Firstpage

3258

Lastpage

3261

Abstract

The maximum operating frequency of the class E amplifier with nonlinear shunt capacitance depends on the transistor duty ratio. It varies with the duty ratio under zero- voltage switching (ZVS) and zero-derivative switching (ZDS) conditions at fixed values of the output power, dc supply voltage. Therefore, the design of the class E amplifier with given values of the shunt capacitance, the output power, dc supply voltage is possible by adjusting the operating frequency. The operating frequency has the maximum value when the duty ratio D_ON is approximately 0.36 at V_DD/V_bi = 1 . It is also shown that the maximum operating frequency is higher when the dc supply voltage V_DD is lower.

Keywords

amplifiers; switching circuits; transistors; zero voltage switching; ZVS operating frequency; class E amplifier duty ratio; dc supply voltage; maximum operating frequency; nonlinear shunt capacitance; transistor duty ratio; zero-derivative switching; Capacitance; Frequency; MOSFET circuits; Power amplifiers; Power generation; Power supplies; Radiofrequency amplifiers; Switches; Transistors; Zero voltage switching; Class E power amplifiers; RF power amplifiers; frequency limitation; nonlinear capacitance; zero-voltage-switching (ZVS) operation;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

978-1-4244-1683-7

Electronic_ISBN

978-1-4244-1684-4

Type

conf

DOI

10.1109/ISCAS.2008.4542153

Filename

4542153