Title :
Class E tuned power amplifier with antiparallel diode or series diode at switch, with any loaded Q and switch duty cycle
Author :
Kazimierczuk, Marian K. ; Puczko, Krzysztof
Author_Institution :
Dept. of Electr. Syst. Eng., Wright State Univ., Dayton, OH, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
An analysis and experimental results are given for a class E switching-mode tuned power amplifier with an antiparallel diode or a series diode at any loaded Q and any switched duty cycle D . The load resistance and the operating frequency of the amplifier can vary over a wide range while maintaining high efficiency. Using equations derived by the authors in a previous publication (ibid., vol.CAS-34, no.2, p.149-59, 1987), the analysis of the amplifier is performed at any values of the derivative of the switch voltage, load resistance, and operating frequency. The experimental switch current and voltage waveforms were in agreement with theoretical predictions. The measured efficiencies were 91 and 88% at 2 MHz in the amplifier with an antiparallel diode and a series diode, respectively
Keywords :
Q-factor; network analysis; power amplifiers; switching circuits; 2 MHz; 88 percent; 91 percent; antiparallel diode; class E; load resistance; loaded Q; operating frequency; series diode; switch duty cycle; switch voltage; switching-mode; tuned power amplifier; Diodes; Frequency; High power amplifiers; Operational amplifiers; Parasitic capacitance; Power amplifiers; Radiofrequency amplifiers; Switches; Switching circuits; Voltage;
Journal_Title :
Circuits and Systems, IEEE Transactions on
