Electronic – PSPICE graphs work separately for subcircuits, wrong when combined

cadenceerrorgraphpspicezener

I'm working on a pulse generation circuit that will be used to drive an ultrasonic transducer. The following circuit is giving an unexpected output.

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It might look complicated, but really it can be divided up into smaller parts. Also, despite the wierd names for the GNDs, they are all 0/CAPSYMs. The P-type MOSFET is the pspice model SiHFU9214 provided by Vishay.

1st Part on Right: 220V DC Power Source
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Verified Output at 220V DC:
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2nd Part: Pulse Controller (100ns pulse at 800sps/1250us)
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The Vpulse does have a 40ns PW parameter, but that is simply due to the delays of the rest of the gates.

Verified Output of 100ns pulses at the desired frequency:
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Of course, the problems always arise when trying to combine different subcircuits. The probed node (1st pic) should be reading around 220V, instead I simply get this sloped line when running the simulation for 3750us.

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When running the simulation for 0.200s, it gets even better.
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In my understanding, this entire node should slowly be raised to 220V when the pulse signal is not activated.
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But that doesn't seem to be happening. Measuring from these next nodes for current and voltage I get a little bit of information.
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I'm wondering if the 60Hz frequency of the DC source, and my pulse frequency of 800Hz might be causing the 10nF capacitor to not charge correctly.

Best Answer

Ok guys. I know you were all sitting on the edge of your seats waiting for a solution to my problem, but I was eventually able to figure it out solely through the power of trial and error.

IT WAS THE TRANSFORMER! I changed it to two coupled inductors like so:

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And this was the result!

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Oh yes... that sexy sinusoid at the top of my pulses gets me...

Anyways, I gotta go take care of some business guys. Thanks for those of you that attempted to solve it!

( ͡ᵔ ͜ʖ ͡ᵔ )

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