* SPICE netlist
R1 1 4 1k
R2 5 4 1k
R3 N014 4 50k
R4 N017 4 5k
R5 N002 N012 39k
C1 N003 N011 30pF
R7 N003 N004 4.5k
R8 N009 N004 7.5k
R9 N005 6 25
R10 6 N015 50
R11 N016 4 50
R12 N013 4 50k
MU1 NC_01 NC_02 NC_03 NC_04 PMOS
MU2 NC_05 NC_06 NC_07 NC_08 NMOS
MU3 NC_09 NC_10 NC_11 NC_12 NMOS
MU4 NC_13 NC_14 NC_15 NC_16 NMOS
MU5 NC_17 NC_18 NC_19 NC_20 NMOS
MU6 NC_21 NC_22 N013 N013 NMOS
MU7 NC_23 N016 NC_24 NC_25 NMOS
MU8 NC_26 NC_27 NC_28 NC_29 NMOS
MU9 NC_30 NC_31 NC_32 NC_33 NMOS
MU10 NC_34 NC_35 NC_36 NC_37 PMOS
MU11 NC_38 NC_39 NC_40 NC_41 PMOS
MU12 N008 NC_42 NC_43 NC_44 PMOS
MU14 NC_45 NC_46 NC_47 NC_48 NMOS
MU15 NC_49 NC_50 NC_51 NC_52 NMOS
MU16 NC_53 NC_54 NC_55 NC_56 NMOS
MU17 NC_57 NC_58 NC_59 NC_60 NMOS
MU18 NC_61 NC_62 NC_63 NC_64 NMOS
MU13 NC_65 NC_66 NC_67 NC_68 PMOS
MU19 NC_69 N002 NC_70 NC_71 PMOS
MU20 NC_72 N001 7 7 PMOS

* LTspice schematic (.asc)
Version 4
SHEET 1 1680 1248
WIRE 8 -560 8 -624
WIRE -392 -384 -424 -384
WIRE -72 -384 -392 -384
WIRE 8 -384 8 -560
WIRE 8 -384 -72 -384
WIRE 88 -384 8 -384
WIRE 360 -384 88 -384
WIRE 568 -384 360 -384
WIRE -392 -336 -392 -384
WIRE -72 -336 -72 -384
WIRE 88 -336 88 -384
WIRE 360 -336 360 -384
WIRE -328 -320 -360 -320
WIRE -104 -320 -328 -320
WIRE 232 -320 120 -320
WIRE 328 -320 232 -320
WIRE -424 -304 -424 -384
WIRE -408 -304 -424 -304
WIRE 568 -272 568 -384
WIRE 360 -256 360 -304
WIRE 392 -256 360 -256
WIRE 488 -256 392 -256
WIRE 536 -256 488 -256
WIRE -392 -240 -392 -304
WIRE -392 -240 -488 -240
WIRE -328 -240 -328 -320
WIRE -328 -240 -392 -240
WIRE 88 -240 88 -304
WIRE 232 -240 232 -320
WIRE 232 -240 88 -240
WIRE -488 -208 -488 -240
WIRE 88 -208 88 -240
WIRE -696 -192 -840 -192
WIRE -520 -192 -696 -192
WIRE -328 -192 -328 -240
WIRE 392 -192 392 -256
WIRE 392 -192 184 -192
WIRE -232 -176 -232 -560
WIRE -232 -176 -296 -176
WIRE 280 -144 264 -144
WIRE 392 -144 392 -192
WIRE 392 -144 360 -144
WIRE 184 -112 184 -192
WIRE 488 -112 488 -256
WIRE 392 -96 392 -144
WIRE 568 -96 568 -240
WIRE 568 -96 520 -96
WIRE 264 -80 264 -144
WIRE 360 -80 264 -80
WIRE -488 -64 -488 -176
WIRE -328 -64 -328 -160
WIRE -360 -48 -456 -48
WIRE -72 -48 -72 -304
WIRE -72 -48 -360 -48
WIRE 568 -48 568 -96
WIRE 264 -16 264 -80
WIRE 280 -16 264 -16
WIRE 392 -16 392 -64
WIRE 392 -16 360 -16
WIRE 392 48 392 -16
WIRE 392 48 280 48
WIRE 456 48 392 48
WIRE 488 48 488 -80
WIRE 568 48 568 32
WIRE 568 48 488 48
WIRE -408 80 -408 -304
WIRE 280 80 280 48
WIRE 568 80 568 48
WIRE 840 80 568 80
WIRE -488 96 -488 -32
WIRE -440 96 -488 96
WIRE -328 96 -328 -32
WIRE 184 96 184 -48
WIRE 184 96 -328 96
WIRE 248 96 184 96
WIRE 568 112 568 80
WIRE 88 160 88 -128
WIRE 88 160 8 160
WIRE 392 176 392 48
WIRE 280 192 280 112
WIRE 360 192 280 192
WIRE -488 208 -488 96
WIRE -328 208 -328 96
WIRE -72 208 -72 -48
WIRE 88 208 88 160
WIRE -408 224 -408 112
WIRE -408 224 -456 224
WIRE -360 224 -408 224
WIRE 8 224 8 160
WIRE 8 224 -40 224
WIRE 56 224 8 224
WIRE 184 256 184 96
WIRE 568 256 568 192
WIRE 392 272 392 208
WIRE 392 272 216 272
WIRE 456 272 456 48
WIRE 536 272 456 272
WIRE -488 288 -488 240
WIRE -488 288 -696 288
WIRE -328 288 -328 240
WIRE -232 288 -328 288
WIRE -488 320 -488 288
WIRE -408 320 -408 224
WIRE -328 320 -328 288
WIRE -72 320 -72 240
WIRE 280 320 280 192
WIRE 392 320 392 272
WIRE -488 416 -488 400
WIRE -408 416 -408 400
WIRE -408 416 -488 416
WIRE -328 416 -328 400
WIRE -328 416 -408 416
WIRE -72 416 -72 400
WIRE -72 416 -328 416
WIRE 8 416 -72 416
WIRE 88 416 88 240
WIRE 88 416 8 416
WIRE 184 416 184 288
WIRE 184 416 88 416
WIRE 280 416 280 400
WIRE 280 416 184 416
WIRE 392 416 392 400
WIRE 392 416 280 416
WIRE 568 416 568 288
WIRE 568 416 392 416
WIRE 8 528 8 416
WIRE -232 544 -232 288
WIRE 8 624 8 528
FLAG -696 -192 3
FLAG -232 -560 2
FLAG 840 80 6
FLAG 8 528 4
FLAG 8 -560 7
FLAG -696 288 1
FLAG -232 544 5
FLAG -408 -336 7
FLAG -56 -336 7
FLAG 72 -336 7
FLAG 376 -336 7
FLAG -504 -64 7
FLAG 584 256 7
FLAG -504 240 4
FLAG -392 112 4
FLAG -312 240 4
FLAG -344 -160 4
FLAG -472 -176 4
FLAG 408 -64 4
FLAG 472 -80 4
FLAG 584 -240 4
FLAG 408 208 4
FLAG 296 112 4
FLAG 168 288 4
FLAG 104 240 4
FLAG -88 240 4
FLAG -312 -64 7
SYMBOL res -504 304 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -344 304 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res -424 304 R0
SYMATTR InstName R3
SYMATTR Value 50k
SYMBOL res -88 304 R0
SYMATTR InstName R4
SYMATTR Value 5k
SYMBOL res 72 -224 R0
SYMATTR InstName R5
SYMATTR Value 39k
SYMBOL cap 168 -112 R0
SYMATTR InstName C1
SYMATTR Value 30pF
SYMBOL res 376 -160 R90
SYMATTR InstName R7
SYMATTR Value 4.5k
SYMBOL res 376 -32 R90
SYMATTR InstName R8
SYMATTR Value 7.5k
SYMBOL res 552 -64 R0
SYMATTR InstName R9
SYMATTR Value 25
SYMBOL res 552 96 R0
SYMATTR InstName R10
SYMATTR Value 50
SYMBOL res 376 304 R0
SYMATTR InstName R11
SYMATTR Value 50
SYMBOL res 264 304 R0
SYMATTR InstName R12
SYMATTR Value 50k
SYMBOL pmos -104 -320 R0
SYMATTR InstName U1
SYMBOL nmos -520 -192 R0
SYMATTR InstName U2
SYMBOL nmos -360 224 R0
SYMATTR InstName U3
SYMBOL nmos -440 96 R0
SYMATTR InstName U4
SYMBOL nmos 56 224 R0
SYMATTR InstName U5
SYMBOL nmos 248 96 R0
SYMATTR InstName U6
SYMBOL nmos 360 192 R0
SYMATTR InstName U7
SYMBOL nmos 536 -256 R0
SYMATTR InstName U8
SYMBOL nmos 360 -80 R0
SYMATTR InstName U9
SYMBOL pmos 328 -320 R0
SYMATTR InstName U10
SYMBOL pmos 536 272 R0
SYMATTR InstName U11
SYMBOL pmos -360 -48 R0
SYMATTR InstName U12
SYMBOL nmos -456 224 M0
SYMATTR InstName U14
SYMBOL nmos -296 -176 M0
SYMATTR InstName U15
SYMBOL nmos -40 224 M0
SYMATTR InstName U16
SYMBOL nmos 216 272 M0
SYMATTR InstName U17
SYMBOL nmos 520 -96 M0
SYMATTR InstName U18
SYMBOL pmos -456 -48 M0
SYMATTR InstName U13
SYMBOL pmos 120 -320 M0
SYMATTR InstName U19
SYMBOL pmos -360 -320 M0
SYMATTR InstName U20