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Test circuit to measure diode junction capacitor

Thread starter #1
Hi all,
Myself Mohan working as R&D engineer in Zettaone technologies,
I'm searching for test bench to measure junction capacitance of a diode(any diode),
i'm not able to find out the exact circuit to measure or test junction capacitance of diode please any one help me by providing circuit .


Below graph i'm i need to plot by measuring diode junction capacitance.
Capture.PNG
 

JimB

Super Moderator
Most Helpful Member
#2
My first thoughts were that you could use an oscillator and measure the frequency as the capacitance changed.
As in this recent thread here:
https://www.electro-tech-online.com...istor-and-rf-transformer.156469/#post-1350239

Then I noticed that the graph stated that the frequency was 1MHz.
So may be you need to make or buy a capacitance measuring bridge that works at 1MHz.

You could try googling " Capacitance bridge 1MHz".
I did and got lots of hits.

JimB
 
Thread starter #4
My first thoughts were that you could use an oscillator and measure the frequency as the capacitance changed.
As in this recent thread here:
https://www.electro-tech-online.com...istor-and-rf-transformer.156469/#post-1350239

Then I noticed that the graph stated that the frequency was 1MHz.
So may be you need to make or buy a capacitance measuring bridge that works at 1MHz.

You could try googling " Capacitance bridge 1MHz".
I did and got lots of hits.

JimB
Hello Mr. Jim,

may be i was wrong in describing my requirement, I am trying to simulate and verify a PSPICE model of a Diode againt its datasheet characteristics. Do you have any recommendations towards the same ?

Thank you,

BR,
Mohan N
 

JimB

Super Moderator
Most Helpful Member
#5
Mohan, you said:
I'm searching for test bench to measure junction capacitance of a diode(any diode),
Below graph i'm i need to plot by measuring diode junction capacitance.
Now you say:
may be i was wrong in describing my requirement, I am trying to simulate and verify a PSPICE model of a Diode
Yes indeed you are wrong, there is no doubt about it.
Why did you deliberately ask the wrong question?

Do you have any recommendations towards the same ?
No.

JimB
 

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