Title :
Analysis of Inverse Class-E Power Amplifier at Subnominal Condition With 50% Duty Ratio
Author :
Peng Chen ; Songbai He
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this brief, the performance of the inverse class-E power amplifier at subnominal condition with 50% duty ratio is studied. The inverse class-E power amplifier at subnominal condition means that it only requires the zero-current switching condition. Since the zero-current derivative switching condition is no longer demanded, the inverse class-E power amplifier at subnominal condition releases an extra design freedom. The theoretical drain efficiency of the inverse class-E power amplifier at subnominal condition is still 100%, and all the circuit element values can be adjusted by the new released parameter. Furthermore, the effect of the switch-on resistor on the practical drain efficiency and the effect of the parasitic inductor on the amplifier maximum operational frequency are investigated.
Keywords :
power amplifiers; zero current switching; amplifier maximum operational frequency; drain efficiency; inverse class-E power amplifier; parasitic inductor; subnominal condition; switch-on resistor; zero-current switching condition; Capacitors; Inductors; Power generation; Resistors; Switches; Transistors; Zero current switching; Drain efficiency; inverse Class-E, power amplifier; inverse class-E; power amplifier; series-L/parallel-tuned; series-L/parallel-tuned, sub-nominal; subnominal; zero current derivative switching (ZCDS); zero current switching (ZCS); zero-current derivative switching (ZCDS); zero-current switching (ZCS);
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2014.2387655
