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High Frequency AC Power Supply

High Frequency AC Power Supply

Hi All,
I need to have an AC power supply @ 400 KHz, 5 V and 1 watt to perform a test on a coil transformer. What is the easiest way to provide the mentioned specs? I have access to Agilent DC power supply and of course 110 V single phase power.

RE: High Frequency AC Power Supply

1 watt, 5 volts, 400 kHz

Those specs are so easy that it would be cheap and simple to bang together a simple one transistor Class A amplifier using a big friendly power mosfet transistor. Use one pot for DC bias, another for gain. "Rat's Nest" direct wiring (no PCB).

RE: High Frequency AC Power Supply

The L272 DUAL POWER OPERATIONAL AMPLIFIER has two channels and can deliver the power you need if you use both cahannels. Gain-BW is 350 kHz for one of them, so you may be into roll-off, but there's usually a margin and with two of them, you should be OK.

The class A version, that IR mentions, may be difficult to make behave properly with the inductive load that you seem to have.

If you want a solution with no fuzz and a reserve for future use, I can highly recommend the Rigol 1022 function/arbitrary generator with the 10 W add-on power amplifier. Very good value for money.

Gunnar Englund
Half full - Half empty? I don't mind. It's what in it that counts.

RE: High Frequency AC Power Supply

Sorry - VE1BLL.

Gunnar Englund
Half full - Half empty? I don't mind. It's what in it that counts.

RE: High Frequency AC Power Supply

If the "coil transformer" is being employed, or tested, as a transformer rather than as a coil (inductor, reactive load), then it may well be a reasonably flat load. But, yes, well worth checking.

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