I'm trying to make a biphasic functional electrical stimulator using the circuits in this paper. But I modified it by using MPSA BJT transistors instead of MOSFET. I'm in the middle of developing a Multisim simulation for it. The boost converter worked fine and could climb up/down to around +-40 Volts. But when I connect it to the driver, the positive voltage would climb up tp two volts, then comes back down to around 1 Volts.
Transistors used are MPSA42 and MPSA92. Can anyone help me figure out what is wrong with this?
PDF of the Multisim circuit is attached. I'm trying to figure out how to attach the ms14 file.
Transistors used are MPSA42 and MPSA92. Can anyone help me figure out what is wrong with this?
PDF of the Multisim circuit is attached. I'm trying to figure out how to attach the ms14 file.
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