A new analytical method for analysis and design of Class E power amplifiers taking into account the switching device on resistance
✍ Scribed by Chen, Wen; Floberg, Henrik; Qiu, Shui-Sheng
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 157 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0098-9886
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✦ Synopsis
The new analytical method presented in this paper extends the principle of the equivalent small parameter method (ESP, an improved perturbation technique) to analyse and design Class E power ampli"ers. Using this method the analytical expression for the output voltage (or current), containing the fundamental frequency component, the second, third and other higher harmonics, can be obtained. Based on this analytical expression, the other analytical expressions which represent the performance of Class E power ampli"ers, such as collector}emitter voltage and collector current of the switching transistor, the e$ciency, the output power as well as the power-output capability can also be obtained. This method is applicable to analyse Class E power ampli"ers with any circuit con"guration and parameters at any switching-on duty cycle, and does also take into account the switching transistor ON resistance. It is valuable to the design of Class E ampli"ers by o!ering designers insight into circuit behavior.