Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

simson

what is the vi equation for a zener diode or a simple diode

  • one year ago
  • one year ago

  • This Question is Open
  1. emicho
    Best Response
    You've already chosen the best response.
    Medals 0

    what you mean in " vi equation"???? but what you mean as i think is " for a normal diode the forward bias voltage is about " 0.6-0.7 volt" for zener diode that will depend on its type and it could be ""5 volt, 8 volt" or even higher...

    • one year ago
  2. CarlosGP
    Best Response
    You've already chosen the best response.
    Medals 5

    For a typical diode the equation is:\[I_{D}=I_{S}(e^{V_{D}/V_{T}}-1)\] And for the voltage it would be: \[V_{D}=V_{T}Ln(1+I_{D}/I_{S})\]

    • one year ago
  3. CarlosGP
    Best Response
    You've already chosen the best response.
    Medals 5

    Pay attention to the fact that when Vd<<0 then Id =-Is approximately, that is why Is is called Reverse Bias Saturation Current Vd=Voltage in the diode Vt=KT/e that is approximately 0.025 Volts at 300 Kelvin Id is the current in the diode For the Zener diode is the same equation, the only difference is the reverse behavior. You can make Vd<<0 and get Id=-Is until Vd<=-Vz(Zener Voltage) and then the reverse current takes a much higer value. That is why Zener diodes are used in Voltage/Current stabilization

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.