![]() I just tried running the simulation again using an NFET. If anybody know how to simulate a switch like these, my class mates and I would be very appreciative (especially since the professor simply said 'Ask Google' when I came to him after trying for several hours). It keeps telling me that it can't find a model for my switch, even though the. I also tried simulating using a voltage controlled switch, but I keep getting weird errors, I assume because the switch is only designed to be "thrown" once, not at a frequency of 200kHz. I tried simulating using a FET (similar to above, just swap in the generic NFET model) as well, but out an output in the microvolt range, which clearly isn't correct. When I simulate with a 5V square wave, I get roughly 18V at the output, but when I simulate with a 50V square wave, I get an output around 42V. I have tried simulated using a BJT with a square wave driving into the gate, but the result is highly dependent upon the voltage applied to the base. I am expecting a regulated voltage of (roughly) 50V. ![]() I have tried using the voltage controlled switch built into LTSpice, but keep getting errors. The problem is that idealized switch in the middle. Aside from solving the circuit (which I have done), I am supposed to simulate the following circuit using LTSpice. Yes, this in a portion of a homework assignment (hence the idealized and slightly asinine problem statement).
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