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Yes would you mind explaning why this behavious doesn't happen I assumed that the voltage across the emitter and collector would be the same once there was a voltage at the gate above the threshold?
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If you really want to make #2 work: Remove "ground" from V1 and connect the bottom of V1 to Emitter. Now it will work.
I tried connecting the emitter to bottom of V1 all that does is increase the gate voltage ?But now V1 has to be a "floating" gate driver.
Yes. Floating. I have done this with transformers long before there were IC to do this job. (driving high voltage NPN transistors)But now V1 has to be a "floating" gate driver.
yepIs this what you did?
So what do you not understand? Lookup "bootstrap".
sorry ignore me I understand now. But in real life does this still apply when I am designning would I have take the emitter back to a common or ground in reference to the gate? Or can I just apply 15V at the gate and it functionally work?So what do you not understand? Lookup "bootstrap".
sorry ignore me I understand now. But in real life does this still apply when I am designning would I have take the emitter back to a common or ground in reference to the gate? Or can I just apply 15V at the gate and it functionally work?
ok brilliant thank you for that clarrificationTo accomplish this connection, V1 has to be totally isolated from ground. If fact, at times, it "lives" 1000V above ground. It needs "isolation" (optical, capacitive, transformer) if it is being commanded from a ground-referenced controller. Do you understand the concept of "differential" voltage between two nodes in a network? The plot shows the differential voltage between Gate and Source=V(out). The previous plot showed V(g) and V(out) with respect to GND.
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