Transistor Question

celect

Joined May 31, 2005
18
What would happen if I replaced a transistor with one that has a lower H
i

vaule?

mozikluv

Joined Jan 22, 2004
1,435
hi

pls clarify what you mean by H i.

celect

Joined May 31, 2005
18
Originally posted by mozikluv@Jun 1 2005, 11:48 PM
hi

pls clarify what you mean by H i.
[post=8144]Quoted post[/post]​

h (hybird)
h Parameters h would be the input resistance
i

Brandon

Joined Dec 14, 2004
306
Originally posted by celect@Jun 2 2005, 06:26 PM
h (hybird)
h Parameters h would be the input resistance
i
[post=8167]Quoted post[/post]​
The input resistance is not something you go around checking usually. Unless your loading down a circuit or need precision sound or something, it shouldn't make a difference.

Give us an idea what your trying to do, might be able to help you out better.

celect

Joined May 31, 2005
18
Originally posted by Brandon@Jun 2 2005, 10:16 PM
The input resistance is not something you go around checking usually. Unless your loading down a circuit or need precision sound or something, it shouldn't make a difference.

Give us an idea what your trying to do, might be able to help you out better.
[post=8178]Quoted post[/post]​
This is a homework question asked what would I expect to happen,

Brandon

Joined Dec 14, 2004
306
Originally posted by celect@Jun 2 2005, 10:50 PM
This is a homework question asked what would I expect to happen,
[post=8182]Quoted post[/post]​
Ahh.. Same here. Never heard of an H value. Was always gm, Rpi, Re, Ru, alpha, and beta.

In the end, nothing really. The transistor would just use less current in the base. You could have a larger fanout in a digital circuit. mmm.. not sure what else.

pebe

Joined Oct 11, 2004
626
Originally posted by celect@Jun 3 2005, 04:50 AM
This is a homework question asked what would I expect to happen,
[post=8182]Quoted post[/post]​
Give a vague answer to a vague question. Just say "Maybe".

mozikluv

Joined Jan 22, 2004
1,435
hi

lets take a specific npn transistor like the 2SC1815R it has a minimum beta of 200 and a max of 750 depending on the collector current. if you were to replace that with the same transistor # but with a different suffix letter like letter Y, would you still have the same performance as the original assuming that none of the items connected to the transistor were replaced. the answer is no.