Depletion Mode Transistor

AI Thread Summary
The discussion centers on the use of internal versus external substrate connections in depletion mode transistors, highlighting the importance of understanding the "body effect." Participants inquire about specific devices and schematics that illustrate the differences between these connections. The body effect can influence the threshold voltage and overall performance of the transistor, making access to the body connection significant in certain applications. There is a lack of clear resources explaining the functional differences, prompting further exploration of the topic. Understanding these connections is crucial for optimizing transistor performance in circuit design.
Raymond31415
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When do you use an internal substrate connection vs an external substrate connection on a depletion mode transistor?
 
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Raymond31415 said:
When do you use an internal substrate connection vs an external substrate connection on a depletion mode transistor?

There are a couple of considerations. Can you say where you have seen the differences? On any devices in particular? Have you heard of the "body effect"?

http://en.wikipedia.org/wiki/MOSFET

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I don't know what the difference in function is between an internal vs an external connection, I had just happen to see a schematic for both online, and I haven't been able to find anything to read about one vs the other.
 
Raymond31415 said:
I don't know what the difference in function is between an internal vs an external connection, I had just happen to see a schematic for both online, and I haven't been able to find anything to read about one vs the other.

Did you read the link that I provided? What is significant about the "body effect"? Why would you sometimes want access to the body connection?
 

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