Public Domain

Recommend Projects

The Diode Equation

4 years ago 792
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments


Demonstrating the diode equation using a SPICE B behavioural current source.

This is the equation that relates current through a diode to the voltage across it:

Id = Is(exp(qV/(nkT))-1)


Id is the diode current,
Is is the reverse bias saturation current,
q is the magnitude of charge on an electron. 
V is the voltage across the diode,
k is the Boltzmann constant, 
T is the absolute temperature of the diode junction (in degrees Kelvin)
n is the ideality factor, also known as the quality factor or sometimes emission 
coefficient. The ideality factor n varies from 1 to 2 depending on the 
fabrication process and semiconductor material and is often assumed to be 
approximately equal to 1 (hence the notation n is omitted). 

The plot shows the current through the diode vs. the voltage across it.

Imported from LTspiceIV.




ID Name Designator Quantity
1 I=IS*(EXP(Q*V(K,A)/(N*K*T)) -1) BDIODE1 1
2 1 R1,V1 2


The owner does not allow comments in this project now

Comments (0)

如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.