* SPICE netlist
R1 N001 Vin_audio {10/denom1}
R2 N001 0 {1/(19.9*denom1)}
R3 N002 VBPF1 {20/denom1}
C1 VBPF1 N001 {C}
C2 N002 N001 {C}
R4 N003 Vin_audio {10/denom2}
R5 N003 0 {1/(19.9*denom2)}
R6 N004 VBPF2 {20/denom2}
C3 VBPF2 N003 {C}
C4 N004 N003 {C}
XU1 VCM N002 VDD VSS VBPF1 level1 Avol=1Meg GBW=10Meg Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
XU2 VCM N004 VDD VSS VBPF2 level1 Avol=1Meg GBW=10Meg Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
V1 VDD 0 5
V2 VCM 0 2.5
V3 Vin_audio 0 SINE(0 0.9 1k)
V4 0 VSS 5
.param C 10n
.param fo1 1k
.param fo2 3k
.param denom1 2*Pi*fo1*C
.param denom2 2*Pi*fo2*C
.tran 10

* LTspice schematic (.asc)
Version 4
SHEET 1 1760 912
WIRE 496 -440 432 -440
WIRE 736 -440 560 -440
WIRE 624 -376 544 -376
WIRE 736 -376 736 -440
WIRE 736 -376 704 -376
WIRE -880 -296 -880 -344
WIRE -720 -296 -720 -344
WIRE -544 -296 -544 -344
WIRE -384 -296 -384 -344
WIRE 624 -248 624 -264
WIRE 320 -232 288 -232
WIRE 432 -232 432 -440
WIRE 432 -232 400 -232
WIRE 480 -232 432 -232
WIRE 544 -232 544 -376
WIRE 592 -232 544 -232
WIRE 736 -216 736 -376
WIRE 736 -216 656 -216
WIRE 864 -216 736 -216
WIRE 432 -200 432 -232
WIRE 592 -200 576 -200
WIRE -880 -184 -880 -216
WIRE -720 -184 -720 -216
WIRE -544 -184 -544 -216
WIRE -384 -184 -384 -216
WIRE 576 -168 576 -200
WIRE 432 -104 432 -120
WIRE 624 -104 624 -184
WIRE 496 120 432 120
WIRE 736 120 560 120
WIRE 624 184 544 184
WIRE 736 184 736 120
WIRE 736 184 704 184
WIRE 624 312 624 296
WIRE 320 328 288 328
WIRE 432 328 432 120
WIRE 432 328 400 328
WIRE 480 328 432 328
WIRE 544 328 544 184
WIRE 592 328 544 328
WIRE 736 344 736 184
WIRE 736 344 656 344
WIRE 880 344 736 344
WIRE 432 360 432 328
WIRE 592 360 576 360
WIRE 576 392 576 360
WIRE 432 456 432 440
WIRE 624 456 624 376
FLAG 432 -104 0
FLAG 624 -104 VSS
IOPIN 400 240 In
FLAG 624 -264 VDD
IOPIN 400 80 In
FLAG 288 -232 Vin_audio
IOPIN 64 112 In
FLAG 432 456 0
FLAG 624 456 VSS
IOPIN 400 800 In
FLAG 624 296 VDD
IOPIN 400 640 In
FLAG 288 328 Vin_audio
IOPIN 64 672 In
FLAG 880 344 VBPF2
IOPIN 656 688 Out
FLAG 864 -216 VBPF1
IOPIN 640 128 Out
FLAG 576 -168 VCM
IOPIN 352 176 In
FLAG 576 392 VCM
IOPIN 352 736 In
FLAG -720 -184 0
FLAG -544 -184 0
FLAG -384 -184 0
FLAG -720 -344 VDD
IOPIN -944 0 Out
FLAG -544 -344 VCM
IOPIN -768 0 Out
FLAG -384 -344 Vin_audio
IOPIN -608 0 Out
FLAG -880 -344 0
FLAG -880 -184 VSS
IOPIN -1104 160 Out
SYMBOL res 416 -248 R90
SYMATTR InstName R1
SYMATTR Value {10/denom1}
SYMBOL res 416 -216 R0
SYMATTR InstName R2
SYMATTR Value {1/(19.9*denom1)}
SYMBOL res 608 -360 R270
SYMATTR InstName R3
SYMATTR Value {20/denom1}
SYMBOL cap 560 -456 R90
SYMATTR InstName C1
SYMATTR Value {C}
SYMBOL cap 544 -248 R90
SYMATTR InstName C2
SYMATTR Value {C}
SYMBOL res 416 312 R90
SYMATTR InstName R4
SYMATTR Value {10/denom2}
SYMBOL res 416 344 R0
SYMATTR InstName R5
SYMATTR Value {1/(19.9*denom2)}
SYMBOL res 608 200 R270
SYMATTR InstName R6
SYMATTR Value {20/denom2}
SYMBOL cap 560 104 R90
SYMATTR InstName C3
SYMATTR Value {C}
SYMBOL cap 544 312 R90
SYMATTR InstName C4
SYMATTR Value {C}
SYMBOL OpAmps\\UniversalOpAmp1 624 -216 R0
SYMATTR InstName U1
SYMBOL OpAmps\\UniversalOpAmp1 624 344 R0
SYMATTR InstName U2
SYMBOL voltage -720 -312 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -544 -312 R0
SYMATTR InstName V2
SYMATTR Value 2.5
SYMBOL voltage -384 -312 R0
SYMATTR InstName V3
SYMATTR Value SINE(0 0.9 1k)
SYMBOL voltage -880 -312 R0
SYMATTR InstName V4
SYMATTR Value 5