I understand a transformer can be constructed from two inductors using mutual inductance statements/parameters, but unfortunately I don't know how to do this.
I also understand that there are many possible parameters for a transformer. For my purposes, a "generic" model (one which assumes no parasitic capacitance and near-zero resistance, for example) would do fine at this point. A simple "plug-n-play" model, if one exists, would be perfect.
I understand a transformer can be constructed from two inductors using mutual inductance statements/parameters, but unfortunately I don't know how to do this.
I also understand that there are many possible parameters for a transformer. For my purposes, a "generic" model (one which assumes no parasitic capacitance and near-zero resistance, for example) would do fine at this point. A simple "plug-n-play" model, if one exists, would be perfect.
Getting weird results. First time out I got nothing, so I flipped one of the inductors. Now it grinds and grinds, doesn't seem to want to converge on a solution. I copied this directly from his schematic, and I trust that his circuit is tested and works. So I guess I must have made a boo-boo somewhere.
I used a 1KΩ load on the output side: maybe not enough? will try a smaller R.
My simulation is attached. (Note: inductances are wrong. Fixed them but still doesn't work right.)
At least I now know how to make a transformer in LTspice.
Whoops. OK, put it in, but still no joy. Hmm, I wonder if Colin is around ... must be something verrrrry mysterious about his little circuit. I'm getting less than 2 volts out of it (supposed to be 5).
Oh well, if anyone has any ideas I'm listening, but otherwise I'm going to pack it in and try again later.
Hmm; choosing higher inductance values (200/600µH instead of 20/60) made a big difference. Getting expected results (including the ~20KHz spikes he described). New .asc posted below.
Whoops. OK, put it in, but still no joy. Hmm, I wonder if Colin is around ... must be something verrrrry mysterious about his little circuit. I'm getting less than 2 volts out of it (supposed to be 5).
Oh well, if anyone has any ideas I'm listening, but otherwise I'm going to pack it in and try again later.