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schematics: additional ADC filter for digital 3.3V supply
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update analog sheet version to v1.0.4
update toplevel schematics version to v3.0.8
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@emard
emard committed Jun 5, 2019
1 parent e3ed37b commit 856cf7f
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185 changes: 132 additions & 53 deletions analog.bak
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@ encoding utf-8
Sheet 9 11
Title "ULX3S"
Date ""
Rev "1.0.3"
Rev "1.0.4"
Comp "EMARD"
Comment1 "Analog audio and video"
Comment2 ""
Expand Down Expand Up @@ -290,23 +290,23 @@ GP17
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Expand Down Expand Up @@ -460,8 +460,8 @@ AUDIO_L
Text Label 3000 2550 0 60 ~ 0
AUDIO_R
Text Label 3800 4250 0 60 ~ 0
ADC3V3
Text Label 2450 4250 0 60 ~ 0
ADCD3V3
Text Label 2400 4250 0 60 ~ 0
ADC3V3
Wire Wire Line
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Expand All @@ -470,76 +470,155 @@ ADC3V3
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Text Label 1100 4450 0 60 ~ 0
ADC3V3
NoConn ~ 2900 5350
NoConn ~ 3700 5100
Text Notes 2950 3500 0 60 ~ 0
Output resistance: 75 ohm\nInternal resistance of FPGA pin: 10 ohm\n1/(1/(130+10)+1/(270+10)+1/(549+10)+1/(1100+10))=74.6
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Connection ~ 4300 4250
$EndSCHEMATC
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