* Z:\tmp\asc_dec_bjh7r6w2\0992038df2c4_AD534_xistor2_dec1.asc
* Generated by LTspice 26.0.1 for Windows.
Q6 N003 N003 N006 0 NPN
Q18 N009 N019 N025 0 NPN
R33 N009 V+ 6k
R26 N039 N041 10k6
R5 N036 N040 10k6
R22 N007 N013 0k5
Q13 N004 N006 N007 0 NPN
R12 N006 N011 0k5
Q2 N027 N035 N036 0 NPN
R24 N041 N043 2k7
R18 N023 N029 8k
R11 N016 0 10k
Q1 N035 N035 SF 0 NPN 2
D1 Out 0 lim
R8 N021 N027 8k
V+ V+ 0 {Vs}
Vz Z2 0 10
R35 N001 N010 2k
Q4 N011 N015 N021 0 NPN
Q3 N028 N035 N037 0 NPN
.model D D
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.dio
.model NPN NPN
.model PNP PNP
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.bjt
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 1640 936
WIRE -464 336 -464 304
WIRE -464 720 -464 416
WIRE -416 304 -464 304
WIRE -384 -96 -512 -96
WIRE -384 304 -416 304
WIRE -384 336 -384 304
WIRE -384 448 -384 416
WIRE -384 464 -384 448
WIRE -384 560 -512 560
WIRE -384 592 -384 560
WIRE -288 448 -384 448
WIRE -288 512 -320 512
WIRE -288 512 -288 448
WIRE -256 384 -272 384
WIRE -224 -96 -304 -96
WIRE -224 -32 -224 -96
WIRE -224 272 -224 224
WIRE -224 384 -256 384
WIRE -224 384 -224 352
WIRE -208 -32 -224 -32
WIRE -208 224 -224 224
WIRE -208 448 -288 448
WIRE -144 -96 -224 -96
WIRE -144 -80 -144 -96
WIRE -144 32 -144 16
WIRE -144 80 -144 32
WIRE -144 176 -144 160
WIRE -144 288 -144 272
WIRE -144 384 -144 368
WIRE -144 400 -144 384
WIRE -144 512 -144 496
WIRE -144 608 -144 592
WIRE -96 384 -144 384
WIRE -64 608 -144 608
WIRE -64 624 -64 608
WIRE 16 -96 -144 -96
WIRE 16 -80 16 -96
WIRE 16 64 16 16
WIRE 16 80 16 64
WIRE 16 176 16 160
WIRE 16 288 16 272
WIRE 16 384 -16 384
WIRE 16 384 16 368
WIRE 16 400 16 384
WIRE 16 512 16 496
WIRE 16 608 -64 608
WIRE 16 608 16 592
WIRE 80 448 -208 448
WIRE 96 -96 16 -96
WIRE 96 224 80 224
WIRE 96 272 96 224
WIRE 96 384 96 352
WIRE 128 384 96 384
WIRE 144 384 128 384
WIRE 176 64 16 64
WIRE 176 64 176 -32
WIRE 192 -32 176 -32
WIRE 224 384 208 384
WIRE 256 -80 256 -128
WIRE 256 272 256 224
WIRE 256 384 224 384
WIRE 256 384 256 352
WIRE 272 224 256 224
WIRE 272 448 80 448
WIRE 336 -80 336 -96
WIRE 336 16 256 16
WIRE 336 80 336 16
WIRE 336 176 336 160
WIRE 336 288 336 272
WIRE 336 384 336 368
WIRE 336 400 336 384
WIRE 368 832 352 832
WIRE 368 864 368 832
WIRE 384 384 336 384
WIRE 384 832 368 832
WIRE 416 -32 400 -32
WIRE 416 32 -144 32
WIRE 416 32 416 -32
WIRE 416 720 -64 720
WIRE 416 720 416 704
WIRE 432 -32 416 -32
WIRE 480 832 464 832
WIRE 496 -128 256 -128
WIRE 496 -80 496 -128
WIRE 496 80 496 16
WIRE 496 176 496 160
WIRE 496 288 496 272
WIRE 496 384 464 384
WIRE 496 384 496 368
WIRE 496 400 496 384
WIRE 560 448 272 448
WIRE 576 -96 336 -96
WIRE 576 -80 576 -96
WIRE 576 16 496 16
WIRE 576 224 560 224
WIRE 576 272 576 224
WIRE 576 384 576 352
WIRE 624 752 624 384
WIRE 656 64 176 64
WIRE 656 64 656 -32
WIRE 736 272 736 224
WIRE 736 384 736 352
WIRE 752 224 736 224
WIRE 752 448 560 448
WIRE 768 -96 576 -96
WIRE 768 0 768 -96
WIRE 768 64 768 0
WIRE 768 160 768 144
WIRE 800 -128 496 -128
WIRE 800 -32 800 -128
WIRE 816 160 768 160
WIRE 816 176 816 160
WIRE 816 288 816 272
WIRE 816 384 816 368
WIRE 816 400 816 384
WIRE 816 512 816 496
WIRE 816 608 816 592
WIRE 864 64 864 48
WIRE 864 160 816 160
WIRE 864 160 864 144
WIRE 864 384 816 384
WIRE 896 48 864 48
WIRE 896 608 816 608
WIRE 896 624 896 608
WIRE 896 720 416 720
WIRE 896 720 896 704
WIRE 928 48 896 48
WIRE 928 64 928 48
WIRE 928 160 928 144
WIRE 976 160 928 160
WIRE 976 176 976 160
WIRE 976 288 976 272
WIRE 976 384 944 384
WIRE 976 384 976 368
WIRE 976 400 976 384
WIRE 976 512 976 496
WIRE 976 608 896 608
WIRE 976 608 976 592
WIRE 976 832 960 832
WIRE 1024 -32 800 -32
WIRE 1024 64 1024 -32
WIRE 1024 160 976 160
WIRE 1024 160 1024 144
WIRE 1040 -96 1024 -96
WIRE 1040 448 752 448
WIRE 1056 0 768 0
WIRE 1056 224 1040 224
WIRE 1056 272 1056 224
WIRE 1056 384 1056 352
WIRE 1072 832 1056 832
WIRE 1088 -32 1024 -32
WIRE 1088 16 1056 0
WIRE 1088 384 1056 384
WIRE 1104 384 1088 384
WIRE 1136 -96 1120 -96
WIRE 1136 -48 1136 -96
WIRE 1136 48 1120 48
WIRE 1136 48 1136 32
WIRE 1152 48 1136 48
WIRE 1216 -96 1136 -96
WIRE 1216 48 1216 -96
WIRE 1216 752 624 752
WIRE 1216 752 1216 48
WIRE 1264 -96 1216 -96
SYMBOL npn -208 -80 R0
SYMATTR InstName Q6
SYMBOL npn 752 176 R0
SYMATTR InstName Q18
SYMBOL res 880 160 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R33
SYMATTR Value 6k
SYMBOL res 960 496 R0
SYMATTR InstName R26
SYMATTR Value 10k6
SYMBOL res -160 496 R0
SYMATTR InstName R5
SYMATTR Value 10k6
SYMBOL res 320 64 R0
SYMATTR InstName R22
SYMATTR Value 0k5
SYMBOL npn 400 -80 M0
SYMATTR InstName Q13
SYMBOL res -160 64 R0
SYMATTR InstName R12
SYMATTR Value 0k5
SYMBOL npn -208 400 R0
SYMATTR InstName Q2
SYMBOL res 880 608 R0
SYMATTR InstName R24
SYMATTR Value 2k7
SYMBOL res 320 272 R0
SYMATTR InstName R18
SYMATTR Value 8k
SYMBOL res 80 256 R0
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL npn -320 464 M0
SYMATTR InstName Q1
SYMATTR Value NPN 2
SYMBOL Misc\\xvaristor 1136 -112 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName D1
SYMATTR Value lim
SYMATTR Prefix D
SYMBOL res -160 272 R0
SYMATTR InstName R8
SYMATTR Value 8k
SYMBOL voltage 480 832 R90
WINDOW 0 -32 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName V+
SYMATTR Value {Vs}
SYMBOL voltage 1072 832 R90
WINDOW 0 -32 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName Vz
SYMATTR Value 10
SYMBOL res 1008 48 R0
SYMATTR InstName R35
SYMATTR Value 2k
SYMBOL npn -208 176 R0
SYMATTR InstName Q4
SYMBOL npn 80 400 M0
SYMATTR InstName Q3
FLAG -256 384 X1
FLAG 128 384 X2
FLAG 224 384 Y1
FLAG 1088 384 Z2
FLAG 1264 -96 Out
FLAG 208 384 0
FLAG 144 384 0
FLAG 368 864 0
FLAG 480 832 V+
FLAG 1072 832 Z2
FLAG 960 832 0
FLAG -512 560 SF
FLAG 1120 48 0
FLAG 896 48 V+
FLAG 1024 -96 0
FLAG -416 304 Zener