Simple Zener Diode Circuits

June 6th, 2009

Laser Diode Modules

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Simple Zener Diode Circuits

Can I substitute a standard diode for a zener diode?

In a simple amplifier circuit. I'm aware of the functional differences, but I'd be okay so long as the the potential never exceeded the former zener diode's breakdown voltage, right?

Presumably the zener is there for a reason. The critical voltage will be the reverse breakdown on your new diode. If the zener is limiting the voltage for some reason then you may have a problem. All most all diodes have a high reverse breakdown. If the zener is supposed to clamp the input due to an anticipated condition you will most likely let that spike or surge through.
As long as you can predict that the zener voltage will never be exceeded go ahead, but if you aren't sure look for a zener. They are not that expensive these days.

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