Implement audio pre-amp

wip
Markus Koch 2020-10-04 17:47:01 +02:00
parent 229b69d5c9
commit 0ad4410f8a
4 changed files with 387 additions and 47 deletions

View File

@ -3,7 +3,7 @@ EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 3 4
Sheet 4 4
Title ""
Date "2020-10-03"
Rev ""
@ -579,4 +579,12 @@ F 3 "" H 1600 4300 50 0001 C CNN
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Text Notes 4800 4400 2 50 ~ 0
Not used:
Wire Wire Line
6550 4200 7150 4200
Wire Wire Line
6550 4300 7150 4300
Text HLabel 7150 4200 2 50 Input ~ 0
AUDIO_L
Text HLabel 7150 4300 2 50 Input ~ 0
AUDIO_R
$EndSCHEMATC

View File

@ -638,14 +638,6 @@ F 3 "" H 1600 5200 50 0001 C CNN
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Wire Wire Line
1300 4400 1400 4400
Wire Wire Line
@ -662,11 +654,308 @@ F 3 "" H 1400 4500 50 0001 C CNN
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Text Label 1650 4200 2 50 ~ 0
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Text Label 1750 4200 2 50 ~ 0
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Text Label 1750 4300 2 50 ~ 0
AUDIO_IN_R
Wire Wire Line
1750 4300 1300 4300
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Wire Wire Line
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Wire Wire Line
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Connection ~ 3800 4350
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F 3 "" H 1400 6200 50 0001 C CNN
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Wire Wire Line
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Wire Wire Line
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Text Label 1950 4900 2 50 ~ 0
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AUDIO_IN_R
Wire Wire Line
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Text HLabel 4700 4450 2 50 Output ~ 0
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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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Wire Wire Line
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Connection ~ 3800 5900
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Wire Wire Line
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F 3 "" H 3800 6600 50 0001 C CNN
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Wire Wire Line
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Wire Wire Line
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AUDIO_IN_R
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Connection ~ 4600 6000
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Text Notes 3500 7100 0 50 ~ 0
TODO: Set sensible\ngain for input stage.
$EndSCHEMATC

View File

@ -1,6 +1,41 @@
EESchema-LIBRARY Version 2.4
#encoding utf-8
#
# Amplifier_Operational_LM358
#
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F3 "" 0 0 50 H I C CNN
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DIP*W7.62mm*
TO*99*
OnSemi*Micro8*
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TSSOP*4.4x3mm*P0.65mm*
MSOP*3x3mm*P0.65mm*
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LFCSP*2x2mm*P0.5mm*
*SIP*
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DRAW
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#
# Connector_AudioJack3
#
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View File

@ -19,40 +19,6 @@ U 5F7CBB94
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@ -75,4 +41,46 @@ Wire Wire Line
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