2ndorder-DSM-noise-analysis.asc

2ndorder-DSM-noise-analysis.asc

Version 4.1
SHEET 1 968 680
WIRE 736 -176 352 -176
WIRE 736 -112 736 -176
WIRE 736 -112 720 -112
WIRE 752 -112 736 -112
WIRE 736 -96 736 -112
WIRE 352 -32 352 -176
WIRE 352 -32 320 -32
WIRE 576 -16 576 -112
WIRE 608 -16 576 -16
WIRE 736 -16 672 -16
WIRE 752 -16 736 -16
WIRE -112 0 -144 0
WIRE 176 64 176 -32
WIRE 208 64 176 64
WIRE 336 64 272 64
WIRE 432 64 336 64
WIRE 576 64 576 -16
WIRE 592 64 576 64
WIRE 736 80 736 -16
WIRE 736 80 656 80
WIRE 592 96 576 96
WIRE 32 144 16 144
WIRE 176 144 176 64
WIRE 192 144 176 144
WIRE 336 160 336 64
WIRE 336 160 256 160
WIRE 16 176 16 144
WIRE 192 176 176 176
FLAG 176 176 0
FLAG -144 0 0
FLAG -112 -80 +5
FLAG 224 128 +5
FLAG -112 80 -5
FLAG 224 192 -5
FLAG 16 256 0
FLAG 576 96 0
FLAG 752 -16 quantizer-input
FLAG 624 48 +5
FLAG 624 112 -5
FLAG 752 -112 quantizer-output
SYMBOL res 192 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL cap 272 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL res 272 -48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL OpAmps\\UniversalOpAmp2 224 160 R0
SYMATTR InstName U1
SYMBOL voltage -112 -96 R0
WINDOW 0 32 56 VTop 2
WINDOW 3 60 56 VTop 2
WINDOW 123 4 56 VTop 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage -112 -16 R0
WINDOW 0 32 56 VTop 2
WINDOW 3 60 56 VTop 2
WINDOW 123 4 56 VTop 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL voltage 16 160 R0
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
WINDOW 123 60 56 VTop 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value ""
SYMBOL cap 320 -48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10�
SYMBOL cap 96 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 10�
SYMBOL res 592 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL cap 672 -32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 10n
SYMBOL res 672 -128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL voltage 736 -112 R0
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
WINDOW 123 60 56 VTop 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V5
SYMATTR Value ""
SYMATTR Value2 AC 1
SYMBOL OpAmps\\UniversalOpAmp2 624 80 R0
SYMATTR InstName U2
SYMBOL cap 720 -128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 10�
SYMBOL cap 496 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 10�
TEXT -248 168 Left 2 !.ac dec 1000 1 1g

resize capacitor so cutoff is more like 50 kHz: