* SPICE netlist
M1 N006 cascn N008 0 NM l=0.18u w=3u
M2 N004 in- N011 N004 PM l=0.18u w=6u
M3 N004 in+ N008 N004 PM l=0.18u w=6u
M4 N005 cascn N011 0 NM l=0.18u w=3u
M5 N008 N005 0 0 NM l=0.18u w=3u
M6 N011 N005 0 0 NM l=0.18u w=3u
M7 N001 cascp N002 N001 PM l=0.18u w=6u
M8 N001 cascp N003 N001 PM l=0.18u w=6u
M9 N001 cascp N004 N001 PM l=0.18u w=6u
M10 N001 cascp cascp N001 PM l=0.18u w=6u
Vin+ in+ 0 DC 1V AC 1
Vdd N001 0 2.5V
M11 N007 N009 0 0 NM l=0.18u w=3u
M12 N009 N009 0 0 NM l=0.18u w=3u
M13 N001 N006 N009 N001 PM l=0.18u w=6u
C1 N007 N006 0.01p
M14 N001 N006 out N001 PM l=0.18u w=12u
C2 out N010 1p
M15 N001 cascp N007 N001 PM l=0.18u w=6u
M16 out N007 0 0 NM l=0.18u w=6u
M18 cascn cascn miller 0 NM l=0.18u w=3u
M19 miller miller 0 0 NM l=0.18u w=3u
L1 in- out 1000Meg
C3 in- 0 1
M20 cascp cascn cascn cascp PM l=0.18u w=6u
M17 N002 cascp N005 N002 PM l=0.18u w=6u
M21 N003 cascp N006 N003 PM l=0.18u w=6u
CL out 0 100p
RL out 0 10Meg
M23 N006 miller N010 N006 PM l=0.18u w=1u
;tran 100u
;op dec 10 1000 100meg
.ac dec 100 1 1g

* LTspice schematic (.asc)
Version 4
SHEET 1 2960 752
WIRE -1272 -376 -1480 -376
WIRE -1208 -376 -1272 -376
WIRE -744 -376 -1208 -376
WIRE -696 -376 -744 -376
WIRE -248 -376 -696 -376
WIRE -200 -376 -248 -376
WIRE -24 -376 -200 -376
WIRE 24 -376 -24 -376
WIRE 328 -376 24 -376
WIRE 504 -376 328 -376
WIRE 568 -376 504 -376
WIRE 1096 -376 568 -376
WIRE -1272 -344 -1272 -376
WIRE -744 -344 -744 -376
WIRE -200 -344 -200 -376
WIRE -24 -344 -24 -376
WIRE 504 -344 504 -376
WIRE -1208 -296 -1208 -376
WIRE -1208 -296 -1272 -296
WIRE -696 -296 -696 -376
WIRE -696 -296 -744 -296
WIRE -248 -296 -248 -376
WIRE -200 -296 -248 -296
WIRE 24 -296 24 -376
WIRE 24 -296 -24 -296
WIRE 568 -296 568 -376
WIRE 568 -296 504 -296
WIRE -1320 -264 -1336 -264
WIRE -792 -264 -808 -264
WIRE -1272 -232 -1272 -248
WIRE -808 -232 -808 -264
WIRE -808 -232 -1272 -232
WIRE -152 -232 -152 -264
WIRE -152 -232 -808 -232
WIRE -72 -232 -72 -264
WIRE -72 -232 -152 -232
WIRE 456 -232 456 -264
WIRE 456 -232 -72 -232
WIRE -1336 -216 -1336 -264
WIRE -1272 -216 -1272 -232
WIRE -1272 -216 -1336 -216
WIRE -1272 -184 -1272 -216
WIRE -1208 -184 -1272 -184
WIRE -200 -184 -200 -248
WIRE -200 -184 -264 -184
WIRE -24 -184 -24 -248
WIRE 40 -184 -24 -184
WIRE -744 -168 -744 -248
WIRE -744 -168 -824 -168
WIRE -664 -168 -744 -168
WIRE -200 -168 -200 -184
WIRE -24 -168 -24 -184
WIRE -1480 -152 -1480 -376
WIRE -1208 -136 -1208 -184
WIRE -1208 -136 -1272 -136
WIRE -824 -120 -824 -168
WIRE -776 -120 -824 -120
WIRE -664 -120 -664 -168
WIRE -664 -120 -712 -120
WIRE -264 -120 -264 -184
WIRE -200 -120 -264 -120
WIRE 40 -120 40 -184
WIRE 40 -120 -24 -120
WIRE 328 -120 328 -376
WIRE 392 -120 328 -120
WIRE -1320 -104 -1352 -104
WIRE 328 -104 328 -120
WIRE 1096 -104 1096 -376
WIRE 1160 -104 1096 -104
WIRE -104 -88 -152 -88
WIRE -72 -88 -104 -88
WIRE -1352 -72 -1352 -104
WIRE -1272 -72 -1272 -88
WIRE -1272 -72 -1352 -72
WIRE -776 -72 -776 -120
WIRE -776 -72 -824 -72
WIRE -712 -72 -712 -120
WIRE -664 -72 -712 -72
WIRE 392 -56 392 -120
WIRE 392 -56 328 -56
WIRE 1096 -56 1096 -104
WIRE -872 -40 -920 -40
WIRE -584 -40 -616 -40
WIRE -200 -24 -200 -72
WIRE -120 -24 -200 -24
WIRE -24 -24 -24 -72
WIRE 216 -24 -24 -24
WIRE 280 -24 216 -24
WIRE -584 -8 -584 -40
WIRE 1160 -8 1160 -104
WIRE 1160 -8 1096 -8
WIRE -200 24 -200 -24
WIRE -24 24 -24 -24
WIRE 216 24 216 -24
WIRE 776 24 216 24
WIRE 1048 24 776 24
WIRE -1480 40 -1480 -72
WIRE -920 40 -920 -40
WIRE -920 40 -1016 40
WIRE -1272 56 -1272 -72
WIRE -1176 56 -1272 56
WIRE -1144 56 -1176 56
WIRE 776 56 776 24
WIRE 776 56 696 56
WIRE -1272 72 -1272 56
WIRE -1192 72 -1272 72
WIRE -920 72 -920 40
WIRE -200 72 -248 72
WIRE 24 72 -24 72
WIRE 776 72 776 56
WIRE -1272 88 -1272 72
WIRE -584 104 -584 72
WIRE -104 104 -152 104
WIRE -72 104 -104 104
WIRE 216 104 216 24
WIRE 392 104 216 104
WIRE 504 104 504 -248
WIRE 504 104 456 104
WIRE 696 120 696 56
WIRE 776 120 696 120
WIRE 1096 120 1096 40
WIRE 1240 120 1096 120
WIRE -1272 136 -1320 136
WIRE 856 152 824 152
WIRE 1096 152 1096 120
WIRE -1192 168 -1192 72
WIRE -1192 168 -1224 168
WIRE -664 184 -664 -24
WIRE -24 184 -24 120
WIRE -24 184 -664 184
WIRE 328 184 328 -8
WIRE 424 184 328 184
WIRE 776 184 776 168
WIRE 952 184 776 184
WIRE 1096 184 1096 152
WIRE 1096 184 1016 184
WIRE -1272 200 -1272 184
WIRE -1176 200 -1272 200
WIRE -1144 200 -1176 200
WIRE -920 200 -920 152
WIRE 1096 200 1096 184
WIRE 1336 200 1096 200
WIRE 1480 200 1336 200
WIRE -920 216 -920 200
WIRE -824 216 -824 -24
WIRE -200 216 -200 120
WIRE -200 216 -824 216
WIRE 504 216 504 104
WIRE 920 216 504 216
WIRE -1272 232 -1272 200
WIRE -1192 232 -1272 232
WIRE -200 232 -200 216
WIRE -24 232 -24 184
WIRE 328 232 328 184
WIRE 504 232 504 216
WIRE 1096 232 1096 200
WIRE -1272 248 -1272 232
WIRE 1480 248 1480 200
WIRE 1336 264 1336 200
WIRE -1272 280 -1304 280
WIRE -200 280 -248 280
WIRE 24 280 -24 280
WIRE 328 280 280 280
WIRE 552 280 504 280
WIRE 1144 280 1096 280
WIRE -1192 312 -1192 232
WIRE -1192 312 -1224 312
WIRE -120 312 -120 -24
WIRE -120 312 -152 312
WIRE -72 312 -120 312
WIRE 424 312 424 184
WIRE 424 312 376 312
WIRE 456 312 424 312
WIRE 920 312 920 216
WIRE 1048 312 920 312
WIRE -1304 328 -1304 280
WIRE -1272 328 -1304 328
WIRE -248 360 -248 280
WIRE -200 360 -200 328
WIRE -200 360 -248 360
WIRE -24 360 -24 328
WIRE 24 360 24 280
WIRE 24 360 -24 360
WIRE 280 360 280 280
WIRE 328 360 328 328
WIRE 328 360 280 360
WIRE 504 360 504 328
WIRE 552 360 552 280
WIRE 552 360 504 360
WIRE 1096 360 1096 328
WIRE 1144 360 1144 280
WIRE 1144 360 1096 360
WIRE -1304 376 -1304 328
WIRE -248 376 -248 360
WIRE -24 376 -24 360
WIRE 280 376 280 360
WIRE 504 376 504 360
WIRE 1096 376 1096 360
WIRE 1336 376 1336 328
WIRE 1480 376 1480 328
FLAG -248 72 0
FLAG 24 72 0
FLAG -248 376 0
FLAG -24 376 0
FLAG -584 104 0
FLAG -1480 40 0
FLAG 280 376 0
FLAG 504 376 0
FLAG 1096 376 0
FLAG -1304 376 0
FLAG -584 -40 in+
FLAG -920 -40 in-
FLAG 1096 152 out
FLAG -1320 136 0
FLAG -1016 104 0
FLAG -1176 200 miller
FLAG -1176 56 cascn
FLAG -1208 -184 cascp
FLAG -104 104 cascn
FLAG -104 -88 cascp
FLAG -920 200 out
FLAG 1336 376 0
FLAG 1480 376 0
FLAG 856 152 miller
DATAFLAG 1616 384 ""
DATAFLAG 1376 288 ""
SYMBOL nmos4 -72 24 R0
SYMATTR Value2 l=0.18u w=3u
SYMATTR InstName M1
SYMATTR Value NM
SYMBOL pmos4 -872 -120 R0
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M2
SYMATTR Value PM
SYMBOL pmos4 -616 -120 M0
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M3
SYMATTR Value PM
SYMBOL nmos4 -152 24 M0
SYMATTR Value2 l=0.18u w=3u
SYMATTR InstName M4
SYMATTR Value NM
SYMBOL nmos4 -72 232 R0
SYMATTR Value2 l=0.18u w=3u
SYMATTR InstName M5
SYMATTR Value NM
SYMBOL nmos4 -152 232 M0
SYMATTR Value2 l=0.18u w=3u
SYMATTR InstName M6
SYMATTR Value NM
SYMBOL pmos4 -152 -344 M0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M7
SYMBOL pmos4 -72 -344 R0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M8
SYMBOL pmos4 -792 -344 R0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M9
SYMBOL pmos4 -1320 -344 R0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M10
SYMBOL voltage -584 -24 M0
SYMATTR Value2 AC 1
SYMATTR Value DC 1V
SYMATTR InstName Vin+
SYMBOL voltage -1480 -168 M0
SYMATTR InstName Vdd
SYMATTR Value 2.5V
SYMBOL nmos4 456 232 R0
SYMATTR Value2 l=0.18u w=3u
SYMATTR InstName M11
SYMATTR Value NM
SYMBOL nmos4 376 232 M0
SYMATTR Value2 l=0.18u w=3u
SYMATTR InstName M12
SYMATTR Value NM
SYMBOL pmos4 280 -104 R0
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M13
SYMATTR Value PM
SYMBOL cap 456 88 R90
SYMATTR InstName C1
SYMATTR Value 0.01p
SYMBOL pmos4 1048 -56 R0
SYMATTR Value2 l=0.18u w=12u
SYMATTR InstName M14
SYMATTR Value PM
SYMBOL cap 1016 168 R90
SYMATTR InstName C2
SYMATTR Value 1p
SYMBOL pmos4 456 -344 R0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M15
SYMBOL nmos4 1048 232 R0
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M16
SYMATTR Value NM
SYMBOL nmos4 -1224 88 M0
SYMATTR Value2 l=0.18u w=3u
SYMATTR InstName M18
SYMATTR Value NM
SYMBOL nmos4 -1224 232 M0
SYMATTR Value2 l=0.18u w=3u
SYMATTR Value NM
SYMATTR InstName M19
SYMBOL ind -936 56 R0
SYMATTR InstName L1
SYMATTR Value 1000Meg
SYMBOL cap -1032 40 R0
SYMATTR InstName C3
SYMATTR Value 1
SYMBOL pmos4 -1320 -184 R0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M20
SYMBOL pmos4 -152 -168 M0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M17
SYMBOL pmos4 -72 -168 R0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=6u
SYMATTR InstName M21
SYMBOL cap 1320 264 R0
SYMATTR InstName CL
SYMATTR Value 100p
SYMBOL res 1464 232 R0
SYMATTR InstName RL
SYMATTR Value 10Meg
SYMBOL pmos4 824 72 M0
SYMATTR Value PM
SYMATTR Value2 l=0.18u w=1u
SYMATTR InstName M23