more biasing with reference voltage

1 files changed, 8 insertions, 60 deletions

diff --git a/gschem/preamps.sch b/gschem/preamps.sch
index db97bde..c59e523 100644
--- a/gschem/preamps.sch
+++ b/gschem/preamps.sch
@@ -12,17 +12,6 @@ value=3.3u
 T 44300 49800 5 10 0 1 0 0 1
 footprint=RCY100P
 }
-C 43700 51300 1 180 0 resistor-2.sym
-{
-T 43300 50950 5 10 0 0 180 0 1
-device=RESISTOR
-T 43400 51500 5 10 1 1 180 0 1
-refdes=R103
-T 43100 50900 5 10 1 1 0 0 1
-value=5.1M
-T 43700 51300 5 10 0 1 0 0 1
-footprint=R025
-}
 C 41600 48000 1 0 0 capacitor-1.sym
 {
 T 41800 48700 5 10 0 0 0 0 1
@@ -60,7 +49,7 @@ refdes=Q101
 T 44400 51000 5 10 0 1 0 0 1
 footprint=TO92
 }
-N 43700 51200 44400 51200 4
+N 42300 51200 44400 51200 4
 N 44100 50700 44100 51200 4
 C 44400 48000 1 0 0 JFET_N-Channel-1.sym
 {
@@ -87,7 +76,6 @@ footprint=TO92
 N 44800 51000 44800 49200 4
 N 44100 49200 46100 49200 4
 N 44100 49200 44100 49800 4
-N 45600 49200 45600 49600 4
 N 44800 49200 44800 48800 4
 C 45500 53100 1 270 0 resistor-2.sym
 {
@@ -146,7 +134,7 @@ device=RESISTOR
 T 45800 47300 5 10 1 1 0 0 1
 refdes=R107
 T 45800 47100 5 10 1 1 0 0 1
-value=220k
+value=1M
 T 45500 47800 5 10 0 1 0 0 1
 footprint=R025
 }
@@ -178,18 +166,16 @@ value=BASS
 }
 N 41100 48200 41600 48200 4
 C 45400 53100 1 0 0 vcc-2.sym
-C 45400 50700 1 0 0 vcc-2.sym
 C 42700 46200 1 0 0 vcc-minus-1.sym
 C 43600 46200 1 0 0 vcc-minus-1.sym
 C 44500 46200 1 0 0 vcc-minus-1.sym
-C 45300 46200 1 0 0 vcc-minus-1.sym
 C 46200 46200 1 0 0 vcc-minus-1.sym
 C 47800 50700 1 0 0 vcc-minus-1.sym
 N 47900 51900 48100 51900 4
 N 48100 51900 48100 51300 4
 N 43000 46800 43000 46900 4
 N 44800 46800 44800 46900 4
-N 45600 46800 45600 46900 4
+N 45600 46600 45600 46900 4
 N 46500 46800 46500 46900 4
 C 49000 48300 1 180 0 input-2.sym
 {
@@ -201,18 +187,6 @@ T 48500 48200 5 10 1 1 180 7 1
 value=BASS OUTPUT
 }
 N 47600 48200 46500 48200 4
-N 45600 50500 45600 50700 4
-C 45500 50500 1 270 0 resistor-2.sym
-{
-T 45850 50100 5 10 0 0 270 0 1
-device=RESISTOR
-T 45800 50000 5 10 1 1 0 0 1
-refdes=R109
-T 45800 49800 5 10 1 1 0 0 1
-value=220k
-T 45500 50500 5 10 0 1 0 0 1
-footprint=R025
-}
 T 48300 38500 9 16 1 0 0 0 1
 Preamps
 C 44300 41800 1 90 0 capacitor-4.sym
@@ -228,17 +202,6 @@ value=3.3u
 T 44300 41800 5 10 0 1 0 0 1
 footprint=RCY100P
 }
-C 43700 43300 1 180 0 resistor-2.sym
-{
-T 43300 42950 5 10 0 0 180 0 1
-device=RESISTOR
-T 43400 43500 5 10 1 1 180 0 1
-refdes=R203
-T 43100 42900 5 10 1 1 0 0 1
-value=5.1M
-T 43700 43300 5 10 0 1 0 0 1
-footprint=R025
-}
 C 41600 40000 1 0 0 capacitor-1.sym
 {
 T 41800 40700 5 10 0 0 0 0 1
@@ -276,7 +239,7 @@ refdes=Q201
 T 44400 43000 5 10 0 1 0 0 1
 footprint=TO92
 }
-N 43700 43200 44400 43200 4
+N 42100 43200 44400 43200 4
 N 44100 42700 44100 43200 4
 C 44400 40000 1 0 0 JFET_N-Channel-1.sym
 {
@@ -303,7 +266,6 @@ footprint=TO92
 N 44800 43000 44800 41200 4
 N 44100 41200 46100 41200 4
 N 44100 41200 44100 41800 4
-N 45600 41200 45600 41600 4
 N 44800 41200 44800 40800 4
 C 45500 45100 1 270 0 resistor-2.sym
 {
@@ -362,7 +324,7 @@ device=RESISTOR
 T 45800 39300 5 10 1 1 0 0 1
 refdes=R207
 T 45800 39100 5 10 1 1 0 0 1
-value=220k
+value=1M
 T 45500 39800 5 10 0 1 0 0 1
 footprint=R025
 }
@@ -394,18 +356,16 @@ value=MELODY
 }
 N 41100 40200 41600 40200 4
 C 45400 45100 1 0 0 vcc-2.sym
-C 45400 42700 1 0 0 vcc-2.sym
 C 42700 38200 1 0 0 vcc-minus-1.sym
 C 43600 38200 1 0 0 vcc-minus-1.sym
 C 44500 38200 1 0 0 vcc-minus-1.sym
-C 45300 38200 1 0 0 vcc-minus-1.sym
 C 46200 38200 1 0 0 vcc-minus-1.sym
 C 47800 42700 1 0 0 vcc-minus-1.sym
 N 47900 43900 48100 43900 4
 N 48100 43900 48100 43300 4
 N 43000 38800 43000 38900 4
 N 44800 38800 44800 38900 4
-N 45600 38800 45600 38900 4
+N 45600 38600 45600 38900 4
 N 46500 38800 46500 38900 4
 C 49000 40300 1 180 0 input-2.sym
 {
@@ -417,18 +377,6 @@ T 48500 40200 5 10 1 1 180 7 1
 value=MELODY OUTPUT
 }
 N 47600 40200 46500 40200 4
-N 45600 42500 45600 42700 4
-C 45500 42500 1 270 0 resistor-2.sym
-{
-T 45850 42100 5 10 0 0 270 0 1
-device=RESISTOR
-T 45800 42000 5 10 1 1 0 0 1
-refdes=R209
-T 45800 41800 5 10 1 1 0 0 1
-value=220k
-T 45500 42500 5 10 0 1 0 0 1
-footprint=R025
-}
 C 31800 37600 0 0 0 title-A2.sym
 C 34500 43900 1 0 1 stereo_jack-1.sym
 {
@@ -505,8 +453,8 @@ T 47400 46800 9 10 1 0 0 0 2
 TODO: replace R109 and R107
 with reference voltage (i.e. GND)?
 C 42200 50100 1 0 0 gnd-1.sym
-N 42800 51200 42300 51200 4
 N 42300 51200 42300 50400 4
 C 42000 42000 1 0 0 gnd-1.sym
-N 42800 43200 42100 43200 4
 N 42100 43200 42100 42300 4
+C 45500 46300 1 0 0 gnd-1.sym
+C 45500 38300 1 0 0 gnd-1.sym