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Old 29th November 2009, 11:38 AM   #1
bbp is offline bbp  China
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Default Ultra high precision digital control attenuator
Many Hi-End manufactures prefer ultra high precision volume contorl, I design a volume control module based on 16 pieces DG413and a pair AD797. Thanks to Mark Levinsion's preamlifier No.32, the layout of my module is similar to No.32's. ^_^
4-layers layout is not an easy job >_<
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Old 29th November 2009, 11:49 AM   #2
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Default adding pics
PCB in 3D in PROTEL
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File Type: jpg R-2RRR.jpg (84.0 KB, 815 views)
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Old 29th November 2009, 11:54 AM   #3
bbp is offline bbp  China
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Default How about the original Mark Levinson
pics from MARK's website
Module in No.32/320s/326s

Click the image to open in full size.
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Old 29th November 2009, 12:21 PM   #4
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Very ,very nice, again ...!
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Old 29th November 2009, 12:35 PM   #5
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Top silk overlay
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Old 29th November 2009, 01:29 PM   #6
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cool!!!
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Old 12th December 2009, 06:57 AM   #7
bbp is offline bbp  China
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The PCB will arrive next week, I will assemble the whole module and test then.
Anyone interest in it? ^_^
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Old 12th December 2009, 03:48 PM   #8
piero7 is offline piero7  Italy
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Quote:
Originally Posted by bbp View Post
The PCB will arrive next week, I will assemble the whole module and test then.
Anyone interest in it? ^_^
Yes!
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Old 12th December 2009, 06:11 PM   #9
Vadim is offline Vadim  Canada
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Quote:
Originally Posted by bbp View Post
The PCB will arrive next week, I will assemble the whole module and test then.
Anyone interest in it? ^_^
Yes, indeed...how many channels can this thing do?
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Old 13th December 2009, 12:04 PM   #10
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Quote:
Originally Posted by bbp View Post
Many Hi-End manufactures prefer ultra high precision volume contorl, I design a volume control module based on 16 pieces DG413and a pair AD797. Thanks to Mark Levinsion's preamlifier No.32, the layout of my module is similar to No.32's. ^_^
4-layers layout is not an easy job >_<
Similar analoge switches uses the Linn preamplifier LK-1 for their source select unit:
QuickView - DG308A, DG309 Quad SPST Analog Switches
The datasheet from DG413 is here:
QuickView - DG411, DG412, DG413 Improved, Quad, SPST Analog Switches

Do you think, that this type is still the best choice as analoge switch?
Or perhaps is a solution with discrete MOSFETs is the royal way (as substitute for relais) especially for an audio high end volume control?
Please read in this case also the follow thread:
MosFet Relais
Last edited by tiefbassuebertr; 13th December 2009 at 12:08 PM.
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