1Ampere Square Wave Current Generator(200Ohms load)

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richeek

Joined: 05 Feb 2008
Posts: 3
Location: College Station Texas

22 Oct 2009 4:08 1Ampere Square Wave Current Generator(200Ohms load)

Hi
I have a 18V/18A DC power supply. I want to use this power supply to generate a 1Ampere CURRENT SQUARE WAVE. The load that I am driving is of 200Ohms approximately.

I used a transistor with its base given a square pulse from the function generator. The load is connected on the collector. Emitter is grounded. Transistor is repeatedly going in CUT-OFF and SATURATION. But in this way the maximum current that I am getting is (18V/200ohms) which is quite less.

Now I am not getting how to increase this current using the SAME DC power supply. Problem which I am facing is that potential across load will be (200x1=200V) so how to handle this with 18V DC power supply.
Should I use transformer?

Any help would be appreciated.

Sincerely
Richeek

bunalmis

Joined: 03 Jan 2003
Posts: 254
Helped: 5
Location: Turkey

22 Oct 2009 7:52 Re: 1Ampere Square Wave Current Generator(200Ohms load)

V = R*I = 200 * 1 = 200V

Your square wave genarator output voltage must be 200v.

You can't use transformer at the out of square wave generator. Because transformers work AC and fixed frequency.

You must increase the power supply voltage.

You can use DC/DC 18v to 200v converter.