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Anonymous Poster

Quasi-Diodes

04/28/2008 3:57 AM

Are there commercially available FETs that operate as a quasi-diode? Where can I get specifications?
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Electroman
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United Kingdom - Member - Olde Member!! Engineering Fields - Instrumentation Engineering - New Member

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#1

Re: Quasi-Diodes

04/28/2008 7:22 AM

As a fet operates on the field effect caused by the voltage on the gate influencing the conductivity of the bulk N or P type drain to source silicon.

No... (at least not that I'm aware of)

You could use a bipolar transistor as a diode?

John.

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Anonymous Poster
#2

Re: Quasi-Diodes

04/28/2008 7:55 AM

I am not familiar with your exact need but JFETs make very good low leakage diodes. The gate tro drain or gate to source junction is a silicon diode. They have slightly higher voltage drops but very low leakage.
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Electroman
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United Kingdom - Member - Olde Member!! Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jul 2006
Location: Dunstable, England
Posts: 2821
Good Answers: 45
#3
In reply to #2

Re: Quasi-Diodes

04/28/2008 9:09 AM

Ooops you are quite right guest.... my mistake I was thinking of mosfets...

John.

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