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Old 14th February 2003, 04:12 PM   #1
Gunders is offline Gunders  Norway
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Default Gain for common anode....

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.
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Old 14th February 2003, 04:29 PM   #2
Joel is offline Joel  United States
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I've never heard the term "common anode" (plate) before. What do you mean?
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Old 14th February 2003, 04:52 PM   #3
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Grounded anode, maybe?
I don't know the formulas for this one.
Hope someone knows them.

Bye!
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Old 14th February 2003, 05:05 PM   #4
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Grounded anode - cathode moves - cathode follower.

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

Tim
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Old 14th February 2003, 05:16 PM   #5
Joel is offline Joel  United States
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The plate is not grounded in a cathode follower.
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Old 14th February 2003, 05:23 PM   #6
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Yes it is- you're thinking DC, not signal.
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Old 14th February 2003, 05:51 PM   #7
Joel is offline Joel  United States
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I haven't had enough coffee yet today....
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Old 14th February 2003, 07:40 PM   #8
Gunders is offline Gunders  Norway
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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??
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Old 14th February 2003, 08:06 PM   #9
Gunders is offline Gunders  Norway
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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??
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Old 14th February 2003, 10:05 PM   #10
Gunders is offline Gunders  Norway
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sorry... I have found an answer to my probøem.. the formula I found was wrong
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