Came across the Quasimondo and Cheapmondo circuits to excite transformer/rectifier oscillations and tune in snubber and decided to implement it using junkbox parts:
- Mosfet: 05N03L
- Logic level gate
- Ron 4mohm @4.5Vgs Id=55A
- Id max 80A
- "gate driver"
- transistor PNP 2N3906
- basis resistor 1k
- pulldown 150ohm
- Clock generator
- 74LS14 hex inverter
- RC feedback
- 1uF
- 1kOhm
Simulated in LTspice (using 0.1uF to get higher oscilator freq and lower sim time)
got some LTspice help from:
https://www.mikrocontroller.net/topic/428100 on how to use schmitt trigger in ltspice
http://electronicsbeliever.com/how-to-sweep-resistance-in-ltspice-with-step-by-step-tutorials/ on how to sweep resistor values
Not pretty but it works well :-)
Here is a 500VA toroid oscillating at 1Mhz.
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