Version 4
SHEET 1 1140 680
WIRE 576 16 528 16
WIRE 624 16 576 16
WIRE 528 48 528 16
WIRE 32 64 -80 64
WIRE 128 64 112 64
WIRE 144 64 128 64
WIRE 240 64 224 64
WIRE 256 64 240 64
WIRE 352 64 336 64
WIRE 480 64 352 64
WIRE -80 96 -80 64
WIRE 128 112 128 64
WIRE 240 112 240 64
WIRE 352 112 352 64
WIRE 480 160 480 112
WIRE 528 160 528 128
WIRE -80 208 -80 176
WIRE 128 208 128 176
WIRE 352 208 352 176
WIRE 240 240 240 176
WIRE 624 240 624 16
WIRE 624 240 240 240
FLAG 128 208 0
FLAG 352 208 0
FLAG 480 160 0
FLAG 528 160 0
FLAG -80 208 0
FLAG 576 16 out
FLAG -80 64 in
SYMBOL res 16 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 15k
SYMBOL res 128 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 240 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 30k
SYMBOL cap 112 112 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL cap 224 112 R0
SYMATTR InstName C2
SYMATTR Value 3.3n
SYMBOL cap 336 112 R0
SYMATTR InstName C3
SYMATTR Value 1n
SYMBOL e 528 32 R0
SYMATTR InstName E1
SYMATTR Value 1
SYMBOL voltage -80 80 R0
WINDOW 3 -21 173 Left 2
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 1 0 1n 1n 2.5m 5m)
SYMATTR Value2 AC 1
TEXT -104 336 Left 2 !.ac dec 100 10 10k
TEXT -104 376 Left 2 ;.tran 0 5m 0 1u
TEXT -104 408 Left 2 !.options plotwinsize=0
TEXT -96 472 Left 2 ;F(jw) = 1/(\n1 \n+ jw*(R1*C1+(R1+R2+R3)*C3) \n+ (jw)^2*(R1*(R2+R3)*C1*C3 + R3*(R1+R2)*C2*C3) \n+ (jw)^3*R1*R2*R3*C1*C2*C3)\n)