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Hello,
I am not so experienced in a low-current electronics and using transistors for usefull purposes in this area and I have not found anything in literature, so I'm looking for some help.
is it possible to use a MOSFET or JFET to ground a high impedance current source (positive ion...
Hi FvM,
right now, I have only a few conceps of the working device. Basically only two. The first is an op amp construction fed by a signal generator and producing waveforms for an RF ion focusing device (capacitive load). However the op amps are quite lossy. The second one is a free running...
Hi biff44,
thanks for the good idea. The frequency does not have to be 0, actually minimum is about 400kHz. I've been thinking how to use op amps, but the solution seems rather difficult. The high voltage op amps are expensive and are unable to reach frequency >30kHz (see the attachment for...
Hi all,
I have a problem with my construction of an RF generator. The range can be fixed or variable, sine wave (2x, 180deg phase shift), output 100-400V, frequency 1-6MHz. The problem is, that I am able to use an RC circuit to generate the required voltage and amplitude but I need to have two...
Hello all dear fellows,
I'm dealing with a difficult task now and I'm looking for some useful hints.
Does someone have any experience with sub-picoampere currents and their routing? What I need to make is a multiplexer able to switch between several low-current lines. I have a really tough...
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