Version 4
SHEET 1 880 680
WIRE 176 0 64 0
WIRE 272 0 176 0
WIRE 272 48 272 0
WIRE 64 96 64 0
WIRE 208 96 176 96
WIRE 304 144 272 144
WIRE 176 176 176 96
WIRE 272 176 272 144
WIRE 64 288 64 176
WIRE 176 288 176 240
WIRE 176 288 64 288
WIRE 272 288 272 256
WIRE 272 288 176 288
WIRE 64 304 64 288
FLAG 64 304 0
FLAG 176 96 B
FLAG 304 144 C
FLAG 176 0 out
SYMBOL current 64 176 R180
WINDOW 0 24 80 Left 2
WINDOW 3 24 0 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value 3
SYMBOL pnp 208 144 M180
WINDOW 123 84 52 Left 2
SYMATTR Value2 temp=tj
SYMATTR InstName Q1
SYMATTR Value q1
SYMBOL zener 192 240 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value d1n5929brl
SYMATTR Description Diode
SYMATTR Type diode
SYMATTR Prefix X
SYMBOL res 256 160 R0
WINDOW 123 31 92 Left 2
SYMATTR Value2 M=8
SYMATTR InstName R1
SYMATTR Value 33
TEXT 56 -120 Left 2 !.dc I1 0.6 4.2 10m
TEXT 56 -88 Left 2 !.model q1 ako:Qtip42c ;D45H11
TEXT 56 -152 Left 2 !.lib TIP42C.LIB
TEXT 56 -192 Left 2 ;.lib http://www.onsemi.com/pub/Collateral/TIP42C.LIB
TEXT 224 312 Left 2 ;8xVitrohm KH218-8 parallel\nRth=15K/W  ca. Tu+70K
TEXT 56 -72 Left 2 !.param tj=25 ;junction temp Q1
TEXT 56 -56 Left 2 !.step param tj list 25 150
TEXT 160 -152 Left 2 !.lib 1N5929BRL.LIB
TEXT 56 -176 Left 2 ;.lib http://www.onsemi.com/pub/Collateral/1N5929BRL.LIB