Re: oscilations in my amplifier ruins my PLL
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Oscillations in a closed loop system are almost always caused by excessive loop gain.? Try reducing the gain in your feedback amplifier.? You should also ensure that your system is linear over the frequency range of your desired operation.? Gain instability can also be caused by amplifier non-linearities.? Check the gain on your EFC since this is a high Q device you may need to attenuate the output before sending it to the YIG mixer.
Sam
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