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-   -   More simple class A (http://www.diyaudio.com/forums/solid-state/88916-more-simple-class.html)

jerluwoo 24th October 2006 07:55 AM

More simple class A
 
2 Attachment(s)
Starting a new thread for a new circuit. Moderators if you feel this should be merged with "my simple class a approach" please do so.
Here we have the same output stage as before with a basic discrete opamp frontend, split rails, and no coupling capacitor.

ilimzn 24th October 2006 08:04 AM

You can omit R2 (replace it with a short)

jerluwoo 24th October 2006 08:10 AM

Yes it can be shorted and still work the same. A current mirror would be better hear but this is just a preliminary circuit for concept. Values and all are not final as I am in need of some help with diffrential circuit and frequency compensation.

darkfenriz 24th October 2006 10:20 AM

Your C3 looks too high for me.

jerluwoo 24th October 2006 12:26 PM

2 Attachment(s)
Without C3

jerluwoo 24th October 2006 12:28 PM

2 Attachment(s)
With C3

Ryssen 24th October 2006 02:46 PM

I am not so keen in construktion,but Wouldn´t a more "modern" transistors make the amp work better?:rolleyes:

jerluwoo 24th October 2006 04:19 PM

Better transistors always will work better. I model with I have on hand to build with for the first "test" circuit. Speaking of which I spent the last couple hours building it. It is only very basic build without "real" ccs's but the sound quality is good. Offset at the output is more than I would like but improvments can be made to lower it easily.


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