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#1 Jul 28, 2016
akhuller
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Specifying Diode Forward Voltage in PSpice Schematics

Hi! I'm new to using PSpice Schematics, and I was wondering how one can specify the forward voltage of a diode.

The circuit is here below, with it continuing till the 10 th capacitor, C10. What diode model should I use, and how do I specify the forward voltage to be 1.4 V?

Thank you so much!

Fri, 2016-07-29 06:53
RobertoGb
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Hello,

I am not able to see the image pretty good, but well depending on the goal of your circuit and your specifications, you should use one diode or another.

You can use a diode from some of the default libraries , for example DIODE.OLB. If you dont know which model you could use, you can also click on Place -> PSpice Component -> Search and look for the category Discrete --> Diodes. There you will find not only avaialble Diodes but also a short description of their characteristics. 

In relation to the forward voltage, once you have chosen and placed a Diode in the schematic, click on it and then with Rifht Mouse Button select Edit PSpice Model. Model Editor will open and you will find the property Vj (Forward Voltage). Change its value to 1.4V and simulate. Consider that a local copy of this PSpice model will be saved automatically in your PSpice simulation profile (Click on  Edit Simulation Profile -> Configuration Profile --> Library).

Other alternative that you have is to place a diode where you decide previously the value for Forward Voltage. Click on Place --> PSpice Component --> Modeling Application --> Diode. A window will pop up and you will be to define the most important characteristics of a diode (you could also complete them using a datashet of a diode).

I hope it helps.

Sun, 2024-05-05 21:42
hebemiley
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