* SPICE netlist
VCarrier1 Ca 0 SINE(0 0.05 89000)
V1 Modu 0 SINE(0 1 120)
B1 AM 0 V=V(Ca)*V(Modu)
D1 out2 outf 1N914
C1 outf 0 33n
R1 outf 0 18k
C2 out 0 6.61n
L1 out 0 484.4
R2 out AM 10k
XU1 N002 N001 VCC 0 out2 TL072 ;pnba In+)In-)V+)V-)OUT
V2 VCC 0 5
R3 N001 vin 10k
R4 out2 N001 1Meg
C3 vin out 1n
R5 N002 VCC 10k
R6 0 N002 7.8k
XU2 outf N003 VCC 0 final TLC372 ;pnba In+)In-)V+)V-)OUT
R7 VCC N003 2.8k
R8 N003 0 2.2k
V3 VDD 0 3.3
.tran 10ms

* LTspice schematic (.asc)
Version 4
SHEET 1 1408 944
WIRE 112 -184 64 -184
WIRE 240 -184 192 -184
WIRE -432 -72 -496 -72
WIRE -304 -72 -352 -72
WIRE -176 -72 -304 -72
WIRE -144 -72 -176 -72
WIRE -64 -72 -80 -72
WIRE -32 -72 -64 -72
WIRE 64 -72 64 -184
WIRE 64 -72 48 -72
WIRE 96 -72 64 -72
WIRE 240 -56 240 -184
WIRE 240 -56 160 -56
WIRE 272 -56 240 -56
WIRE 96 -40 64 -40
WIRE 128 -8 128 -24
WIRE -304 8 -304 -72
WIRE -176 8 -176 -72
WIRE -704 120 -704 104
WIRE -32 152 -48 152
WIRE 64 152 64 -40
WIRE 64 152 48 152
WIRE 80 152 64 152
WIRE 192 152 160 152
WIRE -304 168 -304 72
WIRE -304 168 -496 168
WIRE -176 168 -176 88
WIRE -176 168 -304 168
WIRE 464 168 432 168
WIRE 560 168 544 168
WIRE 592 168 560 168
WIRE 704 168 672 168
WIRE -496 184 -496 168
WIRE 192 200 192 152
WIRE -448 296 -528 296
WIRE -272 296 -384 296
WIRE -160 296 -272 296
WIRE 560 312 560 168
WIRE 576 312 560 312
WIRE -160 328 -160 296
WIRE 704 328 640 328
WIRE -272 344 -272 296
WIRE 576 344 448 344
WIRE 608 392 608 360
WIRE -272 456 -272 408
WIRE -272 456 -288 456
WIRE -160 456 -160 408
WIRE -160 456 -272 456
WIRE -288 472 -288 456
FLAG -224 -344 0
FLAG -496 -376 0
FLAG -496 -456 Ca
FLAG -224 -424 Modu
FLAG 128 -440 AM
FLAG 128 -360 0
FLAG -528 296 out2
FLAG -288 472 0
FLAG -160 296 outf
FLAG -496 184 0
FLAG 128 -8 0
FLAG -704 120 0
FLAG -704 24 VCC
FLAG 128 -88 VCC
FLAG 192 200 0
FLAG -48 152 VCC
FLAG -64 -72 vin
FLAG -176 -72 out
FLAG -496 -72 AM
FLAG 272 -56 out2
FLAG 448 344 outf
FLAG 608 296 VCC
FLAG 608 392 0
FLAG 704 328 final
FLAG 704 168 0
FLAG 432 168 VCC
FLAG 624 -360 0
FLAG 624 -440 VDD
SYMBOL voltage -496 -472 R0
SYMATTR Value SINE(0 0.05 89000)
SYMATTR InstName Carrier1
SYMBOL voltage -224 -440 R0
SYMATTR Value SINE(0 1 120)
SYMATTR InstName V1
SYMBOL bv 128 -456 R0
SYMATTR InstName B1
SYMATTR Value V=V(Ca)*V(Modu)
SYMBOL diode -448 312 R270
SYMATTR InstName D1
SYMATTR Value 1N914
SYMBOL cap -288 344 R0
SYMATTR InstName C1
SYMATTR Value 33n
SYMBOL res -176 312 R0
SYMATTR InstName R1
SYMATTR Value 18k
SYMBOL cap -320 8 R0
SYMATTR InstName C2
SYMATTR Value 6.61n
SYMBOL ind -192 -8 R0
SYMATTR InstName L1
SYMATTR Value 484.4µ
SYMBOL res -336 -88 R90
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL OpAmps\\opamp2 128 -120 R0
SYMATTR InstName U1
SYMATTR Value TL072
SYMBOL voltage -704 8 R0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL res 64 -88 R90
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 208 -200 R90
SYMATTR InstName R4
SYMATTR Value 1Meg
SYMBOL cap -80 -88 R90
SYMATTR InstName C3
SYMATTR Value 1n
SYMBOL res 64 136 R90
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 176 136 R90
SYMATTR InstName R6
SYMATTR Value 7.8k
SYMBOL OpAmps\\opamp2 608 264 R0
SYMATTR InstName U2
SYMATTR Value TLC372
SYMBOL res 448 184 R270
SYMATTR InstName R7
SYMATTR Value 2.8k
SYMBOL res 576 184 R270
SYMATTR InstName R8
SYMATTR Value 2.2k
SYMBOL voltage 624 -456 R0
SYMATTR InstName V3
SYMATTR Value 3.3