Problem: Stepping up voltage of a high frequency sine wave = 50 KHz to 100 KHz range.
Inside SMPS circuits I find a donut shaped transformer that I think is used to step down the voltage from the high voltage circuit plus isolate it from mains. I have read that SMPS oscillators work at frequencies in 10s to 100s of Kilocycles. From what I read transformers can be used in either direction but not equally well.
So I have a sine wave generated around 50 to 100 KHz and 0 to 5 volts can I simply use the round transformer with the connectors reversed to step up this voltage to whatever ratio that the transformer was originally stepping down?
Even if it is not a perfect solution will it work at all and what part will not work? What can I do to make it work? I do not want to use a amplifier because the amplifiers I can get are all up to 20 KHz and I do not have a 20 voltage or higher and a + - power supply or SMPS that the amplifiers need. Oh and I have many broken SMPS units I can take apart.