Title :
ZVS condition predicting sensor for class E amplifier
Author :
Suetsugu, Tadashi ; Kazimierczuk, Marian K.
Author_Institution :
Electr. Eng. Dept., Wright State Univ., Dayton, OH, USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
A method that predicts the zero-voltage switching (ZVS) condition is presented for the class E amplifier operating at any duty ratio. The prediction is obtained in real-time by observing the switch and shunt capacitor current waveforms with a simple analog-digital circuit. Using this method, a control and/or protection circuit that ensures the ZVS operation may become feasible. Simulation and experimental results showed that the proposed ZVS prediction circuit worked properly.
Keywords :
electric sensing devices; power amplifiers; prediction theory; switching circuits; ZVS condition predicting sensor; analog-digital circuit; class E amplifier; control circuit; current waveform; duty ratio; protection circuit; shunt capacitor; switch capacitor; zero-voltage switching; Analog-digital conversion; Capacitance; Communication switching; High power amplifiers; Switched capacitor circuits; Switches; Switching circuits; Switching loss; Temperature sensors; Zero voltage switching;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
DOI :
10.1109/TCSI.2003.812621
