And now, the Regulator-Chip JLH Amp. - diyAudio
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Old 26th October 2010, 11:33 AM   #1
Elvee is offline Elvee  Belgium
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Lightbulb And now, the Regulator-Chip JLH Amp.

After the Regulator Chip Amp and the Chtringlunator, it is time to translate the JLH topology into voltage regulators (I hope JLH won't be turning in his grave).

The task is pretty straightforward, and the results are excellent.
And since the circuit operates in class A, it doesn't have slew-rate issues.

In practice, R2 and R9 can be halved: the spice model I have for the LM317 reaches its current limit at only 850mA, about half the actual device. This will make the amplifier able to drive a 4 ohm load.

Pics will follow.
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File Type: gif VregChipAmpJLH.GIF (37.2 KB, 922 views)

Last edited by Elvee; 26th October 2010 at 11:35 AM.
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Old 26th October 2010, 05:01 PM   #2
Elvee is offline Elvee  Belgium
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Here it is:
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File Type: jpg ChipJLH1.JPG (255.9 KB, 866 views)
File Type: jpg ChipJLH2.JPG (276.2 KB, 770 views)
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Old 26th October 2010, 06:18 PM   #3
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You devise lots of funny amps. Will you ever tell us how they sound?
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Old 27th October 2010, 02:23 PM   #4
Elvee is offline Elvee  Belgium
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A small rectification: the circuit shown in the pictures above is slightly modified.
Here is the actual schematic.

Quote:
You devise lots of funny amps. Will you ever tell us how they sound?
I don't think so. You'll have to try for yourself. It won't cost you a fortune though
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File Type: gif ChipRegJLH.GIF (17.9 KB, 767 views)
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Old 28th October 2010, 08:07 AM   #5
ampimp is offline ampimp  United Kingdom
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Hi Elvee
Very interesting
How about a chip amp regulator ??? To feed your regulator chip amp?
Regards Ian
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Old 28th October 2010, 02:04 PM   #6
Elvee is offline Elvee  Belgium
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Quote:
Originally Posted by ampimp View Post
Hi Elvee
Very interesting
How about a chip amp regulator ??? To feed your regulator chip amp?
Regards Ian
Why not, a chip amp would make a nice, 4-quadrant PSU.
But the PSU would then be more expensive than the amplifier it feeds.
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Old 29th October 2010, 09:01 AM   #7
ampimp is offline ampimp  United Kingdom
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Quote:
Originally Posted by Elvee View Post
Why not, a chip amp would make a nice, 4-quadrant PSU.
But the PSU would then be more expensive than the amplifier it feeds.
I find the psu is offen the most expensive anyway so im guessing a four quadrant psu would cost four times as much.or is that 16???? Im not even sure what a four quadrant psu is . would it be four times as much fun to design. if so it would be worth it .
Ian
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Old 29th October 2010, 09:26 AM   #8
ampimp is offline ampimp  United Kingdom
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Quote:
Originally Posted by Elvee View Post
Why not, a chip amp would make a nice, 4-quadrant PSU.
But the PSU would then be more expensive than the amplifier it feeds.
I find the psu is offen the most expensive anyway so im guessing a four quadrant psu would cost four times as much.or is that 16???? Im not even sure what a four quadrant psu is . would it be four times as much fun to design. if so it would be worth it .
Ian
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Old 29th October 2010, 04:27 PM   #9
Elvee is offline Elvee  Belgium
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Quote:
Originally Posted by ampimp View Post
I find the psu is offen the most expensive anyway
You are probably including the transformer and filter caps, which are needed anyway.
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so im guessing a four quadrant psu would cost four times as much.or is that 16???? Im not even sure what a four quadrant psu is .
It is a supply capable not only of sourcing current, but also sinking it, and for both polarities.
High end lab supplies have that feature, they can serve not only as conventional PSUs (with better dynamic performances), but also as electronic loads.
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Old 29th October 2010, 04:44 PM   #10
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Originally Posted by ampimp View Post
would it be four times as much fun to design.
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