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Old 2nd January 2013, 12:21 PM   #8181
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I use that kind of decoupling too. Usually 220uF and 22 Ohm. The 0.1uF straight over the supply pins i found first at Douglas Self.
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Old 2nd January 2013, 04:23 PM   #8182
MiiB is offline MiiB  Denmark
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Nice papers thanks..

This is what we did to prevent oscillation in the high impedance mirrors of the paradise..
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Old 2nd January 2013, 09:00 PM   #8183
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Analog Devices: Analog Dialogue: Ask The Applications Engineer - 25
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Old 3rd January 2013, 12:30 PM   #8184
FdW is offline FdW  Netherlands
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O.k. I posted this in the builder thread, I should have posted it here, sorry

Quote:
Originally Posted by FdW View Post
And if you have some spare time, go-to Google.com (yes that one ). In the search-bar type the name of your favorite component (BD140? or (as I did here) LME49710). Then select 'Images' and be amazed . Looking at these images you see odd items (or just interesting ones), select one and have a look.

BTW this is what I found in the LME49710 search results opamp??
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Old 3rd January 2013, 12:31 PM   #8185
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I will look that up.
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Old 4th January 2013, 08:34 AM   #8186
FdW is offline FdW  Netherlands
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There is a ton of good information in the http://cds.linear.com/docs/Datasheet/lt1115fa.pdf datasheet.
Attached Images
File Type: png OpampTable.PNG (77.3 KB, 320 views)
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Old 4th January 2013, 11:14 AM   #8187
PMA is offline PMA  Europe
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Quote:
Originally Posted by FdW View Post
There is a ton of good information in the http://cds.linear.com/docs/Datasheet/lt1115fa.pdf datasheet.
Yes there is, but several local DIYers here have asked me for help for the reason that a phono preamp built according to the datasheet was oscillating. LT1115 may behave tricky, especially with additional buffer in the loop. So is AD797.
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Old 4th January 2013, 11:36 AM   #8188
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by PMA View Post
Yes there is, but several local DIYers here have asked me for help for the reason that a phono preamp built according to the datasheet was oscillating. LT1115 may behave tricky, especially with additional buffer in the loop. So is AD797.
Are you refering to the paradise ?

If so what opamp do you suggest for the servo ?
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Old 4th January 2013, 11:52 AM   #8189
PMA is offline PMA  Europe
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Quote:
Originally Posted by RCruz View Post
Are you refering to the paradise ?

If so what opamp do you suggest for the servo ?
No, I was referring to the datasheet that FDW has linked here, i.e.
http://cds.linear.com/docs/Datasheet/lt1115fa.pdf
There is a schematic of phono preamp with LT1115 and I was referring to that.

Regarding paradise, I have a feedback of one local DIYer here and yes, he says it is oscillating. But it is just one piece, no statistics available to me regarding paradise.

For servos, I use OP07, OP177 and OPA134.
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Old 4th January 2013, 04:46 PM   #8190
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http://digilander.libero.it/paeng/projects_frame.htm
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