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Diamond jfet/bjt headphone buffer

post #1 of 4
3/2/13 at 9:30am
Thread Starter 

this idea is swap input transistor of traditional diamond buffer with jfet

http://www.esafono.it/stee_headphone.png

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post #2 of 4
3/2/13 at 2:01pm
That probably works but is not a diamond buffer.
You have to flip the positions of the jets and move the current sources
To the bases of the output transistors
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post #3 of 4
3/2/13 at 5:17pm

actually that schematic has a number of problems.

 

This is what you want.

http://gilmore.chem.northwestern.edu/fetdiamondp.pdf

 

and then you can add a servo around it and drive the current source

to maintain 0 volts dc on the output.

 

performance about .005% thd, and flat to 20khz.

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post #4 of 4
3/2/13 at 11:31pm
Thread Starter 
HELLO KEVIN!
tries to mimic the pattern without current source (no with fet)
and with the bootstrap (the voltage is lowered to 12V)
I think it is better for several reasons
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