Gain for common anode....

[Gunders]

I just have a simple question this time....

I'm just wondering how the gain formula for a common anode stage looks like.

I have tried to derive the formula, but I don't know if it's right.

 

[Joel]

I've never heard the term "common anode" (plate) before. What do you mean?

 

[Petman]

Grounded anode, maybe?
I don't know the formulas for this one.
Hope someone knows them.

Bye!

 

[Sch3mat1c]

Grounded anode - cathode moves - cathode follower.

It's always less than one, and a recent thread has covered that I think..

Tim

 

[Joel]

The plate is not grounded in a cathode follower.

 

[SY]

Yes it is- you're thinking DC, not signal.

 

[Joel]

I haven't had enough coffee yet today....

 

[Gunders]

Well... I'm mixing two languages a bit, Norwegian and english. I translated the norwegian words directly.
Common anode = felles anode... where 'felles' is the norwegian word for common.

I have found a formula for the gain in a grounded plate stage, the formula who I found is:

gain= (u*Ug*Rk)/(rp+Rk*(u+1))

Kan somebody verify this formula??

 

[Gunders]

Well... I'm mixing two languages a bit, Norwegian and english. I translated the norwegian words directly.
Common anode = felles anode... where 'felles' is the norwegian word for common.

I have found a formula for the gain in a grounded plate stage, the formula who I found is:

gain= (u*Ug*Rk)/(rp+Rk*(u+1))

Can somebody verify this formula??

 

[Gunders]

sorry... I have found an answer to my probøem.. the formula I found was wrong