Hi guys. My Development Team Improved Dadods 100W CFA with Input Stage active load (current mirrors) and even lower distortion -100W:
https://www.diyaudio.com/community/threads/200w-mosfet-cfa-amp.243481/post-4857977
The amplifier turned out with very low distortion. Nice clipping. Little delay. Protection.
https://www.diyaudio.com/community/threads/200w-mosfet-cfa-amp.243481/post-4857977
The amplifier turned out with very low distortion. Nice clipping. Little delay. Protection.
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Hello Printnik
greetings can you explain more about the protection
circuit part is it short circuit with latching relay
warm regards
Andrew
greetings can you explain more about the protection
circuit part is it short circuit with latching relay
warm regards
Andrew
Andrew, the relay will not have time to protect the transistors. This circuit uses a fast trigger protection. The relay can be used for standard DC voltage output protection. Relay contacts must be covered by feedback. It is necessary to connect a high-resistance resistor in parallel with the relay contacts in order not to break the DC feedback.
Hi,
Out of curiosity, what do you mean by 'improved' would you care to differentiate the changes made vs Damirs design?
Thanks!
Albert
Out of curiosity, what do you mean by 'improved' would you care to differentiate the changes made vs Damirs design?
Thanks!
Albert
Hello de Ocampo. I showed the improvement in the diagram. 6.8 ohm resistors degrade thermal stability. Input transistors collector voltage-base equal to zero will not work normally.
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I missed this thread.
I will not call it improvement, as overall feedback says transistor works with very low CE voltage. You used cascoded VAS, I tried it bat not need here where distortion is so low and it eats headroom. Different compensation, way?