* SPICE netlist
Vi N010 0 AC {1-z*z}
Iz N010 N008 AC {0.5*z*(z+1)}
Viy N008 N011 0
Vz N011 N012 AC {0.5*z*(z-1)}
Ey Y 0 N010 N012 1
Rs N007 N010 100
V1 N009 N008 0
C1d N007 N008 30p
Rm1 N007 N009 50
Ct1 N004 N007 5p
B1 N004 N007 I=I(V1)
R3 0 N004 200
C2d 0 N004 16p
V2 N001 0 0
Rm2 N001 N004 200
Ct2 N004 N002 5p
B2 N002 N004 I=I(V2)
Cc N002 0 5p
R8 N002 0 10Meg
C3t 0 N002 5p
B3 0 N002 I=I(V3)
C3d N002 N003 30p
Rm3 N002 N005 50
V3 N005 N003 0
C4t 0 N003 50p
B4 0 N003 I=I(V4)
C4d N003 O 160p
Rm4 N003 N006 10
V4 N006 O 0
R1 N012 0 100
R2 O N012 900
RL O 0 1k
.ac dec 100 100m 100G
.param z=0
.step param z list -1 0 1

* LTspice schematic (.asc)
Version 4
SHEET 1 1184 880
WIRE -192 -440 -304 -440
WIRE 112 -440 -192 -440
WIRE 240 -440 112 -440
WIRE 384 -440 240 -440
WIRE 512 -440 384 -440
WIRE 592 -440 512 -440
WIRE 592 -424 592 -440
WIRE -304 -408 -304 -440
WIRE 240 -408 240 -440
WIRE 112 -392 112 -440
WIRE 384 -392 384 -440
WIRE 512 -392 512 -440
WIRE -192 -376 -192 -440
WIRE -144 -376 -192 -376
WIRE -48 -376 -64 -376
WIRE -192 -360 -192 -376
WIRE -48 -360 -48 -376
WIRE 112 -296 112 -328
WIRE 112 -296 64 -296
WIRE 240 -296 240 -328
WIRE 240 -296 112 -296
WIRE 384 -296 384 -328
WIRE 384 -296 336 -296
WIRE 512 -296 512 -312
WIRE 512 -296 384 -296
WIRE 240 -280 240 -296
WIRE 512 -280 512 -296
WIRE -304 -264 -304 -328
WIRE -304 -264 -496 -264
WIRE -192 -264 -192 -296
WIRE -192 -264 -304 -264
WIRE -48 -264 -48 -280
WIRE -48 -264 -192 -264
WIRE -496 -248 -496 -264
WIRE -304 -248 -304 -264
WIRE 112 -248 112 -296
WIRE -192 -232 -192 -264
WIRE -48 -232 -48 -264
WIRE 384 -216 384 -296
WIRE 240 -184 240 -200
WIRE 512 -184 512 -200
WIRE -496 -152 -496 -184
WIRE -496 -152 -576 -152
WIRE -304 -152 -304 -168
WIRE -304 -152 -496 -152
WIRE -192 -136 -192 -168
WIRE -48 -136 -48 -152
WIRE -48 -136 -192 -136
WIRE -496 -120 -496 -152
WIRE -304 -120 -304 -152
WIRE -48 -120 -48 -136
WIRE -48 -120 -176 -120
WIRE 64 -120 64 -296
WIRE 64 -120 -48 -120
WIRE -176 -104 -176 -120
WIRE -48 -104 -48 -120
WIRE 112 -72 112 -184
WIRE 240 -72 240 -104
WIRE 240 -72 112 -72
WIRE 336 -72 336 -296
WIRE 336 -72 240 -72
WIRE 384 -72 384 -152
WIRE 512 -72 512 -104
WIRE 512 -72 384 -72
WIRE -576 -56 -576 -152
WIRE -496 -24 -496 -56
WIRE -432 -24 -496 -24
WIRE -304 -24 -304 -40
WIRE -304 -24 -352 -24
WIRE -176 -8 -176 -24
WIRE -48 -8 -48 -40
WIRE -48 -8 -176 -8
WIRE -48 8 -48 -8
WIRE -496 40 -496 -24
WIRE -240 40 -496 40
WIRE -576 104 -576 24
WIRE -448 104 -576 104
WIRE -240 104 -240 40
WIRE -240 104 -368 104
WIRE -240 120 -240 104
WIRE 512 120 512 -72
WIRE 576 120 512 120
WIRE 576 136 576 120
WIRE -240 216 -240 200
WIRE -448 232 -480 232
WIRE -336 232 -368 232
WIRE 576 232 576 216
WIRE -336 248 -336 232
WIRE -576 312 -576 104
WIRE -432 312 -432 280
WIRE -432 312 -576 312
WIRE -384 312 -384 280
WIRE -240 312 -240 296
WIRE -240 312 -384 312
WIRE -576 328 -576 312
WIRE -240 328 -240 312
WIRE 144 328 -240 328
WIRE 320 328 144 328
WIRE 512 328 512 120
WIRE 512 328 400 328
WIRE 144 344 144 328
WIRE -576 424 -576 408
WIRE 144 440 144 424
FLAG -576 424 0
FLAG -336 248 0
FLAG -480 232 Y
FLAG -48 8 0
FLAG 592 -424 0
FLAG 144 440 0
FLAG 576 232 0
FLAG 576 120 O
SYMBOL voltage -576 312 R0
SYMATTR Value2 AC {1-z*z}
SYMATTR InstName Vi
SYMATTR Value ""
SYMBOL current -448 104 R270
SYMATTR InstName Iz
SYMATTR Value ""
SYMATTR Value2 AC {0.5*z*(z+1)}
SYMBOL voltage -240 104 R0
SYMATTR Value 0
SYMATTR InstName Viy
SYMBOL voltage -240 200 R0
SYMATTR Value2 AC {0.5*z*(z-1)}
SYMATTR InstName Vz
SYMATTR Value ""
SYMBOL e -464 232 R270
SYMATTR InstName Ey
SYMATTR Value 1
SYMBOL res -592 -72 R0
SYMATTR InstName Rs
SYMATTR Value 100
SYMBOL voltage -336 -24 R90
SYMATTR InstName V1
SYMATTR Value 0
SYMBOL cap -512 -120 R0
SYMATTR InstName C1d
SYMATTR Value 30p
SYMBOL res -320 -136 R0
SYMATTR InstName Rm1
SYMATTR Value 50
SYMBOL cap -512 -248 R0
SYMATTR InstName Ct1
SYMATTR Value 5p
SYMBOL bi -304 -248 R0
SYMATTR InstName B1
SYMATTR Value I=I(V1)
SYMBOL res -320 -424 R0
SYMATTR InstName R3
SYMATTR Value 200
SYMBOL cap -208 -360 R0
SYMATTR InstName C2d
SYMATTR Value 16p
SYMBOL voltage -48 -376 R90
SYMATTR InstName V2
SYMATTR Value 0
SYMBOL res -64 -376 R0
SYMATTR InstName Rm2
SYMATTR Value 200
SYMBOL cap -208 -232 R0
SYMATTR InstName Ct2
SYMATTR Value 5p
SYMBOL bi -48 -152 M180
SYMATTR InstName B2
SYMATTR Value I=I(V2)
SYMBOL cap -64 -104 R0
SYMATTR InstName Cc
SYMATTR Value 5p
SYMBOL res -192 -120 R0
SYMATTR InstName R8
SYMATTR Value 10Meg
SYMBOL cap 96 -392 R0
SYMATTR InstName C3t
SYMATTR Value 5p
SYMBOL bi 240 -408 R0
SYMATTR Value I=I(V3)
SYMATTR InstName B3
SYMBOL cap 96 -248 R0
SYMATTR InstName C3d
SYMATTR Value 30p
SYMBOL res 224 -296 R0
SYMATTR InstName Rm3
SYMATTR Value 50
SYMBOL voltage 240 -200 R0
SYMATTR Value 0
SYMATTR InstName V3
SYMBOL cap 368 -392 R0
SYMATTR InstName C4t
SYMATTR Value 50p
SYMBOL bi 512 -392 R0
SYMATTR InstName B4
SYMATTR Value I=I(V4)
SYMBOL cap 368 -216 R0
SYMATTR InstName C4d
SYMATTR Value 160p
SYMBOL res 496 -296 R0
SYMATTR InstName Rm4
SYMATTR Value 10
SYMBOL voltage 512 -200 R0
SYMATTR Value 0
SYMATTR InstName V4
SYMBOL res 128 328 R0
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL res 416 312 R90
SYMATTR InstName R2
SYMATTR Value 900
SYMBOL res 560 120 R0
SYMATTR InstName RL
SYMATTR Value 1k