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|20th October 2006, 05:57 PM||#1|
Join Date: Nov 2005
Location: serbia, zajecar
New SE follower design
The schematic I attached is a my version of class A, single ended ,mosfet power follower. I made the prototype and this is the most "neutral" sounding amplifier I heard so far! (this may be subjectivism).
I have no equipment to measure thd but when simulating, this design gives 20 to 30dB better thd figures then classic type power follower.
I wanted to make se class A follower that could be driven from a simple 6DJ8 common cathode voltage amplifier.
Simulation results and other data:
1.thd 2nd. 0.005% at full power
thd 3rd. 0.001% at full power
thd 5th. 0.007% at full power
2.When driven with high output impedance voltage stage(50K), bandwidth is(15Hz - 100KHz(+/-0.5dB))
3.Input stage bias 10.8mA
4.Out stage bias 2.2A per mosfet
5.Power 30W at 4Ohm in pure class A(Input voltage 18V)
So, wath do you think, any suggestions before I start to make PCB?
It would be nice if NP could comment...
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