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Very basic Zener Diode/LTSpice simulation question
Very basic Zener Diode/LTSpice simulation question
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Old 26th September 2011, 01:21 PM   #11
jan.didden is offline jan.didden  Europe
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Originally Posted by eranrund View Post
I see.

I was hoping to use LTSpice to experiment with basic stuff (such as the Zener regulation) I am trying to learn.
Guess I'm gonna have to just take its result with a grain of salt

Thanks again
LTspice or any spice is VERY good for the use you want it for. You can build a regulator, experiment with current values, 'what if' questions, that sort of thing.
For instance, you can verify how the ripple rejection changes when you vary the series resistance to the zener. That is ideal to play with your circuit before putting it in hardware.
You don't get a 0.0001% correct value answer, but almost always you get a correct 'trend' answer, and that's very important.
Also in hardware you wouldn't get 0.0001% correct values.

And let's face it, it is totally irrelevant whether your opamp supply gives out 14.8 or 15.123 or something in that area. 15V supply is just a design value.

jan didden
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