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I agree that oscillations are the most obvious and likely cause. However as already explained there are no oscillations to be found. I have loosely coupled the drain to a spectrum analyser and looked upto 8 ghz. Nothing.
Usually high frequency oscillations are very sensitive to small changes in...
I'm using an mrf1513 as a driver for a larger device. I noticed as I varied the gate bias the output on the drain would vary quite nicely and then suddenly step to a larger value. The step only occurs at high drain rf voltages. The rf on the drain swings to a peak of around 30v and minimum of a...
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