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| HV AC Function Generator for Biology Experiment |
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| jbb:
An RF step-up transformer at those frequencies and voltages would be quite hard. With a high turns ratio the output winding capacitance makes the output impedance quite low, which mangles the waveforms. |
| Marco:
If you do want to DIY something, how about a class A amplifier with NDFPD1N150CG low side and a current source based on the same high side? You're going to need to put them on a good heatsink and run them toasty because even though they have pretty low Coss at 9 pF that's still quite a lot and will presumably swamp the load. I don't think there's anything in that voltage range with significantly lower output capacitance, for lower voltages there are ... but for stacks you need isolated gate drives and that will quickly increase complexity. Lets say 2 MHz 10 pF, going to need to run with a quiescent current of ~60 mA, which will burn 30W in each transistor. PS. actually that's a bit beyond the SOA, a IXTH02N250 could do it. PPS. going to need a beefy gate drive of course. |
| TimFox:
At the "MHz" end of the spectrum, one could run a class-C non-linear or class-B linear vacuum tube amplifier into a resonant load, and get kV sine waves directly across the resonant circuit, with high voltage applied to the circuit. This would be equivalent to a ham-band transmitter, and you might have to worry about RF interference to your neighbors. |
| coppercone2:
what is it that you are making? |
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