the resistor in the middle ?
Yea ....... Center tap it to ground (0V)
If you split the resistor in the middle in halfIt does NOT need a ground reference, except at the inputs.
and put a test probe in the middle .........
What should you see ?
If you split the resistor in the middle in half
and put a test probe in the middle .........
What should you see ?
Distortions of input ignal.
More questions?
“I wake up and I see the face of the devil and I ask him, 'What time is it?' And he says, How much time do you want?”
"Never speak with strangers."
Mikhail Bulgakov
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Hi JC,
What is it?
Erno Borbely's articles in Audio Amateur in the 70-ies. Only he managed to do it with all FETs. ;-)
jan
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Parasound JC-2 simpified
The link should bring you to post #1515
Add the output buffer's (LED's, resistors (trimpot's) and MOSFET's shown in previous post by John) and feedback resistors.
Two of the components are wrong in the schematic I posted.
Cheers
Stein
http://www.diyaudio.com/forums/analog-line-level/146693-john-curls-blowtorch-preamplifier-part-ii-152.html#post1931584
The link should bring you to post #1515
Add the output buffer's (LED's, resistors (trimpot's) and MOSFET's shown in previous post by John) and feedback resistors.
Two of the components are wrong in the schematic I posted.
Cheers
Stein
http://www.diyaudio.com/forums/analog-line-level/146693-john-curls-blowtorch-preamplifier-part-ii-152.html#post1931584
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Hi,
For you, probably. For me it is "kleingeld" (small money).
Ciao T
So, small change is "gelding"? Sorry, couldn't resist....
For you, probably. For me it is "kleingeld" (small money).
Ciao T
Hi Johnless tilted
What's the connection in the center of the diagram for? (aside from "NOT GROUND, DAMMIT!" )
Is it just a test point?
p.s. Looking at it again, it seems that common mode voltage at the input will be transferred to the output, albeit not amplified. Is that not a concern? IIRC, one of Nelson's topologies does the same thing.
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