Power a coil with a MOSFET driven by a BJT in ground
The transformer is a typical automotive coil:
LP = 8mH
RP = 15Ohms
RATIO = 1:100
LS = LP * POW(RATIO,2)
RS = 100kOhms

I did not have time to put proper models in for suitable transistors and diodes, so pick a 27V zener diode in a large package.  

A push-pull driver rather than a single PNP will produce larger voltages as it's the rate of change of current that effects the magnitude of the output. The rate of change of current is limited here by the 100R resistor combined with the gate capacitance of the FET.

WARNING:  This circuit will produce pulses of about 3kV, that could cause serious harm or even death, especially if you have a heart condition - academic interest only, please don't build it.  







simulate this circuit &ndash; Schematic created using CircuitLab