Hello Everybody:
I just found out this forum and it is extremely useful for my design! By simply going through the articles and messages posted here, I have gained a lot of valuable information. Thanks to everybody!
Right now, I am working on a 20 dBm input, 33 dBm output at 150 MHz with bandwidth 30 MHz and Vcc = 15V class E power amplifier design. My schematic and the component values are obtained from the Sokal article and simulation is done using Microwave Office software. The output seems to be reasonable except that the drain current in time domain goes to negative. I can not understand this. The model used is MRF 9060SR1. Can this be caused by the SPICE parameters associated with the simulation model? Sokal's artical dose not provide a sample driver circuit design. Where could I find this information? In addition, where could I learn the method to make air-wound transformers at 150MHz with any impedance ratio?
THANKS A LOT!!!
Tiaotiao Xie
2005, 06, 16