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if you're looking to make a filter or some other circuit, you can use Alumina as the substrate, but you don't want to make the whole thing with alumina. It's brittle and will *****, so generally it's smaller things that are done on it, not full...
Could someone please explain how a PLL charge pump operates? And if I need to interface to a high voltage VCO with an opamp, can I simulate that?
I get that it's a switching current source, biased by a voltage source at say 3.3V or 5V source and at it's simplest form it could be a BJT current...
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