A community for students.
Here's the question you clicked on:
 0 viewing
edr1c
 3 years ago
how to estimate diode bulk resistance from IV graph?
edr1c
 3 years ago
how to estimate diode bulk resistance from IV graph?

This Question is Closed

nick67
 3 years ago
Best ResponseYou've already chosen the best response.1Hi edr1c, as a rule of thumb you may evaluate the forward diode resistance as: \[R _{F}=\Delta V_{D} / \Delta I_{D}\] taking values from the quasilinear portion of the characteristic

edr1c
 3 years ago
Best ResponseYou've already chosen the best response.0so by taking 2points above the turn on voltage for the diode, i will get the approximate resistance by taking their gradient?

edr1c
 3 years ago
Best ResponseYou've already chosen the best response.0does barrier potential comes into consideration when calculating this resistance? because the previous section asked us to estimate the barrier potential.

edr1c
 3 years ago
Best ResponseYou've already chosen the best response.0the reason im raising the question is because i obtained a very high value for the resistance. Voltage, V1/V Current, I/mA 0.6 0.92 0.64 1.71 0.68 4.04 0.7 5.81 0.72 8.81 0.74 12.72 0.76 17.86 0.77 20.89 i got around 17ohm by taking the 2nd and 3rd point

nick67
 3 years ago
Best ResponseYou've already chosen the best response.1Well, if you take points too close to the diode knee you have of course a greater resistance, because it is still going into forward bias; if you take last two points you have a resistance of about 3,3 Ohm; in this region the diode is in its linear zone

nick67
 3 years ago
Best ResponseYou've already chosen the best response.1As for the barrier potential you could apply a reverse calculus taking values from last two points; you have there a diode voltage of about 0.76 V and a diode current of about 19 mA. If you subtract the voltage on the bulk resistance from the total diode voltage you can evaluate the barrier potential:\[V _{barrier} = V _{D}  R _{bulk} I _{D}\] that is 0.76  3.3 x 0.019 = 0.697 V

911elctronic
 5 days ago
Best ResponseYou've already chosen the best response.0I just get artictle about <a href=" http://911electronic.com/tunneldiodecharacteristicsymboldefinition/ ">tunnel diode</a>, if you need to get more information about this electronic device check this
Ask your own question
Sign UpFind more explanations on OpenStudy
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
 Engagement 19 Mad Hatter
 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.