I want to use 12 VDC and step it up to 400 VAC or higher at 100 kHz. I am buiding a signal generator that outputs a sine wave or square wave with an adjustable frequency of up to 100 kHz. I need an isolation step-up transformer using a car battery as the power supply.

Does any one know a way to achieve this? I am unable to find a transformer suitable for my needs.

  • 2
    \$\begingroup\$ How much current? And is 400 volts RMS or pk-pk? And can you operate at 60 Hz rather than 100 Hz? And, if this thing fails, does anybody get hurt? \$\endgroup\$ Feb 16, 2015 at 11:09
  • \$\begingroup\$ What will be the maximum power/current output? \$\endgroup\$
    – Golaž
    Feb 16, 2015 at 11:09
  • \$\begingroup\$ Seems like a flyback followed by a half bridge chopper would be the simplest solution, unless the power required is north of 100W. \$\endgroup\$
    – John D
    Feb 16, 2015 at 19:37
  • \$\begingroup\$ Current is under 2 amps. Peak to peak. I am trying to reduce the voltage drop at 100 Hz. Voltage drops down to 5 volt and it is too low at 50 Hz. \$\endgroup\$
    – Gene Ward
    Feb 17, 2015 at 7:55
  • \$\begingroup\$ I need as high a voltage as possible at 100 Hz and am not requiring a high power output \$\endgroup\$
    – Gene Ward
    Feb 17, 2015 at 7:58

1 Answer 1


Specifications are incomplete.. Input voltage: fixed at 12 Volts or variable? Output frequency range ?.. It can not be uoto 100khz. output current output valtage fixed 400 V? or variable? Help may be available.. V. T. Ingole


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