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Old 14th June 2007, 05:56 AM   #1
roender is offline roender  Romania
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Default FC amp, there is any method to reduce H3?

What do you think about this input stage?
It is my new amplifier and this stage will be coupled with classA_25W/classB_100W triple darlington output stage with 5 peers of Onsemy 0302/0281 power BJTs
The NFB gain will not be more than 40dB.
What can I improve in this stage to reduce H3?

Mihai
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Old 14th June 2007, 11:38 AM   #2
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pp input stage?
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Old 14th June 2007, 12:04 PM   #3
roender is offline roender  Romania
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Yes, only one stage, folded cascode!
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Old 14th June 2007, 04:23 PM   #4
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Why don't you try AD797 topology, folded cascode + diamond buffer = one gain stage as well. See my findings below for inspiration...
http://www.diyaudio.com/forums/showt...74#post1227374
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