17. The sequel to ADS class AB power amplifier design
Based on CGH40010F
The type of power amplifier actually obtained in the previous tutorial is not strictly a class AB power amplifier, but more like an inverse EF power amplifier. The reason is that the harmonic conditions were not limited when the parameter OPTIM was used before, which led to the final control of the harmonics and caused the waveform to deviate from the original design. This article corrects it
Addendum: The author is also a student. During the study, I found that the type of power amplifier in many papers is not determined by the final actual waveform, but by the original design method. For example, this time we originally planned to design a class AB power amplifier, but after tuning and optimization, the actual output waveform is far from that of class AB, but it should still be called class AB.
Therefore, strictly speaking, this article is just an optimization of the previous one. Although the actual effect is more like a class E power amplifier, it was originally designed according to a class AB power amplifier, so it should still be called a class AB power amplifier. At first, I didn't understand this very well. I thought about designing a class AB power amplifier, but the resulting effect waveform was more like a switch, which was confusing.
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16. Class AB power amplifier design of ADS use record
0. Source file download
https://download.csdn.net/download/weixin_44584198/84993546
1. Matching circuit correction
Re-tuning, you can add the Goal related to the harmonics, and get the result:
2. PCB correction
Copy the input and output matching of the new parameters to the PCB_LAYOUT circuit diagram, click to generate the circuit again:
adjust the circuit diagram and re-simulate:
click the Symbol button to regenerate the symbol:
3. Co-simulation
Insert the above symbol in the schematic diagram, insert the relevant harmonic balance control, and perform simulation:
scan the input power:
scan the frequency:
4. Summary
The actual effect is more like a class E power amplifier! faint