Version 4
SHEET 1 956 680
WIRE 160 -64 -256 -64
WIRE 368 -64 160 -64
WIRE 528 -64 368 -64
WIRE 368 -48 368 -64
WIRE 528 -48 528 -64
WIRE 368 64 368 32
WIRE 416 64 368 64
WIRE 432 64 416 64
WIRE 480 64 464 64
WIRE 528 64 528 32
WIRE 528 64 480 64
WIRE -256 96 -256 -64
WIRE 80 96 16 96
WIRE 128 96 80 96
WIRE 224 96 128 96
WIRE 368 96 368 64
WIRE 528 96 528 64
WIRE 128 144 128 96
WIRE 224 144 224 96
WIRE 304 144 224 144
WIRE 448 144 384 144
WIRE 512 144 448 144
WIRE 624 144 592 144
WIRE -144 192 -192 192
WIRE -32 192 -64 192
WIRE 16 192 16 176
WIRE 16 192 -32 192
WIRE 16 208 16 192
WIRE 368 208 368 192
WIRE 416 208 368 208
WIRE 448 208 448 144
WIRE 448 208 416 208
WIRE 528 208 528 192
WIRE 528 208 448 208
WIRE 624 240 624 144
WIRE 624 240 224 240
WIRE 448 272 448 208
WIRE 80 288 16 288
WIRE 128 288 128 224
WIRE 128 288 80 288
WIRE 224 288 224 240
WIRE 224 288 128 288
WIRE -256 384 -256 176
WIRE -192 384 -192 192
WIRE -192 384 -256 384
WIRE 448 384 448 352
WIRE 448 384 -192 384
WIRE -256 400 -256 384
FLAG -256 400 0
FLAG 80 96 DIFP
FLAG 80 288 DIFN
FLAG 160 -64 UDD
FLAG -32 192 UCOM
FLAG 480 64 Outp
FLAG 416 64 Outn
FLAG 416 208 YY
SYMBOL current 448 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName Itail
SYMATTR Value 100µ
SYMBOL voltage 128 128 R0
WINDOW 39 0 0 Left 2
WINDOW 3 30 88 Left 2
SYMATTR Value 0
SYMATTR Value2 AC 0 0
SYMATTR InstName VDIF
SYMBOL res 0 80 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 0 192 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL voltage -48 192 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 31 30 VTop 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VCOM
SYMATTR Value 2
SYMBOL voltage -256 80 R0
SYMATTR InstName VDD
SYMATTR Value 5
SYMBOL AMScells\\n4 320 96 R0
SYMATTR InstName U1
SYMBOL AMScells\\n4 576 96 M0
SYMATTR InstName U2
SYMBOL res 352 -64 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 512 -64 R0
SYMATTR InstName R4
SYMATTR Value 1k
TEXT 40 432 Left 2 !.include C:/Programs/LTspiceIV/lib/sub/AMSlev49.sub
TEXT -192 432 Left 2 !.dc VDIF -1 1 1m