Simulated and added raw simulation for RC filter.

ltspice/current source/current_source.asc

@@ -32,10 +32,10 @@ FLAG 192 -192 0
 FLAG 112 -48 IN
 SYMBOL res 368 32 R0
 SYMATTR InstName R1
-SYMATTR Value 10
+SYMATTR Value 50
 SYMBOL res 368 -272 R0
 SYMATTR InstName R2
-SYMATTR Value 100
+SYMATTR Value 150
 SYMBOL npn 320 -112 R0
 SYMATTR InstName Q1
 SYMATTR Value 2N3904
@@ -43,8 +43,8 @@ SYMBOL voltage 80 -16 R0
 WINDOW 3 24 44 Left 2
 WINDOW 123 24 72 Left 2
 WINDOW 39 0 0 Left 2
+SYMATTR Value SINE(0.75 0.75 500)
 SYMATTR InstName V1
-SYMATTR Value SINE(0 100m 500)
 SYMBOL voltage 576 -272 R0
 SYMATTR InstName V2
 SYMATTR Value 5
@@ -60,6 +60,6 @@ SYMBOL voltage 80 96 R0
 WINDOW 3 24 44 Left 2
 WINDOW 123 0 0 Left 2
 WINDOW 39 0 0 Left 2
+SYMATTR Value 0
 SYMATTR InstName V5
-SYMATTR Value 1
 TEXT 32 296 Left 2 !.tran 0 10ms 0 100us

ltspice/current source/current_source.net

@@ -1,20 +0,0 @@
-* C:\Users\elmar\Desktop\UU\UppSense\ltspice\current source\current_source.asc
-R1 N003 0 50
-R2 N001 N002 {R}
-Q1 N002 N004 N003 0 2N3904
-V1 IN N005 1.5
-V2 N001 0 5
-V3 V+ 0 10
-V4 0 V- 10
-V5 N005 0 0
-XU1 IN N003 V+ V- N004 AD8615
-.model NPN NPN
-.model PNP PNP
-.lib C:\Users\elmar\OneDrive\Documents\LTspiceXVII\lib\cmp\standard.bjt
-;tran 0 10ms 0 100us
-.include ad8615.cir
-.op 1
-.step param R 50 200 1
-.op
-.backanno
-.end