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Buffer with Dual N-Ch Jfets and Dual Power Supply
Buffer with Dual N-Ch Jfets and Dual Power Supply
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Old 14th March 2019, 10:50 AM   #11
vdi_nenna is offline vdi_nenna  United States
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Buffer with Dual N-Ch Jfets and Dual Power Supply
Maybe a set of caps is not such a bad thing.
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Old 14th March 2019, 02:45 PM   #12
Zen Mod is offline Zen Mod  Serbia
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Buffer with Dual N-Ch Jfets and Dual Power Supply
I'm under 1mV all the time

more likely as 500uV
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Old 14th March 2019, 02:49 PM   #13
vdi_nenna is offline vdi_nenna  United States
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Buffer with Dual N-Ch Jfets and Dual Power Supply
With matched jfets?
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Old 14th March 2019, 02:56 PM   #14
Zen Mod is offline Zen Mod  Serbia
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Buffer with Dual N-Ch Jfets and Dual Power Supply
matched triplet up, matched triplet down

I told you where to look
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Old 14th March 2019, 03:07 PM   #15
vdi_nenna is offline vdi_nenna  United States
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Buffer with Dual N-Ch Jfets and Dual Power Supply
I saw it.
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Old 14th March 2019, 03:18 PM   #16
EUVL is offline EUVL  Europe
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Some other Source Follower Configurations
Posts #353, 457, 473.
Taylor Source Follower
NJFETs for Source Follower Applications


Patrick
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Old 14th March 2019, 03:26 PM   #17
Calvin is offline Calvin  Germany
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Hi,

the 'Calvin Buffer' is a improved and beefed-up version of circuit 16a.
Sonically it adds power and slam, which the simple JFET-only Buffers might slightly miss.
It works with several different but still available N-JFETs (the BF862 are already obsolete for a while now).
There are versions utilizing throughhole devices as well as all-SMD variants.
The search will lead You to the associated threads.

jauu
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Old 14th March 2019, 03:28 PM   #18
twitchie is offline twitchie  Canada
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Buffer with Dual N-Ch Jfets and Dual Power Supply
Quote:
Originally Posted by Zen Mod View Post
...
buy 100pcs of JFet I used and you're good for a decade , for peanuts , without any loss of performance (comparing to more expensive options)

but it's so much cheaper in 1000 quantities ... still looking for BL Idss?

If a person still has access to 2SK170 or LSK170 and doesn't have to go through the exercise of vero-board replacement (think - stack 3 sot-23 adapters into a single 3-pin footprint for drop in replacement), is there a good reason to do this other than the fun of experimenting? That's good enough reason for me
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Old 14th March 2019, 03:30 PM   #19
twitchie is offline twitchie  Canada
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Buffer with Dual N-Ch Jfets and Dual Power Supply
Quote:
Originally Posted by Zen Mod View Post
matched triplet up, matched triplet down

I told you where to look
you need to match sand grains too!!!

What happens if you sneeze?
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Old 14th March 2019, 03:54 PM   #20
EUVL is offline EUVL  Europe
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> the 'Calvin Buffer' is a improved and beefed-up version of circuit 16a.

I have tried a few CFP with N-JFETs and PNPs.
They are sometimes a bit "nervious" for my taste.
But just my personal choice.


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