MiniRef Schematic and PCB layout - Page 4 - diyAudio
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Old 7th June 2012, 07:50 AM   #31
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siva in national datasheet it is specified that the bride output current is given by
(Rf/Ri)*Vin/Rsense,substituting the values of design we get unity gain....soory there i was first refering your first schematic version,

in the datasheet they have also told of the bridge output impedance to be some R/deltaR
i couldnt get it really...please explain if you got it correctly.

Then the 1k+22pf combination ,is it for preventing oscillation at high frequencis?is it possible to raise the cap value to .001uF range and compencate in resistor value because its difficult to get good quality pf values for me
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Old 7th June 2012, 01:37 PM   #32
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Also siva what is jung topology?
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Old 7th June 2012, 08:55 PM   #33
kmibb is offline kmibb  United States
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Count me in for a group buy if this ever gets tested and what-not.
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Old 8th June 2012, 04:26 AM   #34
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Quote:
Originally Posted by kmibb View Post
Count me in for a group buy if this ever gets tested and what-not.
I would be interested as well. Please let me know if you ever decide to progress with this one.
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Old 15th June 2012, 06:23 AM   #35
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Quote:
Originally Posted by kmibb View Post
Count me in for a group buy if this ever gets tested and what-not.
+1
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Old 16th June 2012, 07:11 AM   #36
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siva is there a way we can avoid using those electrolytic cap from the feedback path,it will really help to reduce some frequency selective distortion
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Old 21st June 2012, 12:53 PM   #37
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OK, there seems to be some interest, but I don't have the time to order the PCBs and offer a Group Buy. Therefore, I'm posting the Eagle schematics and layout of MiniRef 1.02 here, under the terms of the GNU GPL. They're free to use and modify as long as the original credits are retained on all derivative works. No warranty, express or implied, is offered.
Attached Files
File Type: zip mini102.zip (55.5 KB, 142 views)
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Old 21st June 2012, 01:32 PM   #38
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Here are the exported images of the schematic and layout - hope it uploads from my GPRS phone.
Attached Images
File Type: png mini102_sch.png (44.7 KB, 880 views)
File Type: png mini102_brd.png (140.7 KB, 790 views)

Last edited by linuxguru; 21st June 2012 at 01:37 PM. Reason: attachments
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Old 29th June 2012, 12:49 PM   #39
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Has anyone tried this out yet? I'm itching to know how it performs!
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Old 4th July 2012, 07:14 AM   #40
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Hey linuxguru, do you have a recommended BOM? Thank you very much, Chris
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