Version 4 SHEET 1 1848 1300 WIRE -96 208 -96 160 WIRE -96 336 -96 288 WIRE -96 368 -96 336 WIRE 0 160 -96 160 WIRE 16 1056 -80 1056 WIRE 32 592 -64 592 WIRE 224 592 112 592 WIRE 224 656 224 592 WIRE 224 768 224 720 WIRE 224 800 224 768 WIRE 224 1056 96 1056 WIRE 224 1120 224 1056 WIRE 224 1232 224 1184 WIRE 224 1264 224 1232 WIRE 272 592 224 592 WIRE 272 1056 224 1056 WIRE 336 160 80 160 WIRE 336 208 336 160 WIRE 336 336 -96 336 WIRE 336 336 336 272 WIRE 336 368 336 336 WIRE 336 1056 272 1056 WIRE 336 1104 336 1056 WIRE 336 1232 224 1232 WIRE 336 1232 336 1184 WIRE 352 592 272 592 WIRE 352 640 352 592 WIRE 352 768 224 768 WIRE 352 768 352 720 WIRE 384 160 336 160 WIRE 464 160 384 160 WIRE 464 208 464 160 WIRE 464 336 336 336 WIRE 464 336 464 288 WIRE 656 96 656 16 WIRE 656 208 624 208 WIRE 656 208 656 176 WIRE 656 256 656 208 WIRE 656 384 656 352 WIRE 704 208 656 208 WIRE 736 1056 640 1056 WIRE 752 592 656 592 WIRE 832 16 656 16 WIRE 832 32 832 16 WIRE 832 128 832 112 WIRE 832 208 784 208 WIRE 832 288 832 208 WIRE 848 304 720 304 WIRE 848 304 848 208 WIRE 864 288 832 288 WIRE 864 304 864 288 WIRE 896 208 848 208 WIRE 944 592 832 592 WIRE 944 640 944 592 WIRE 944 800 944 720 WIRE 944 1056 816 1056 WIRE 944 1104 944 1056 WIRE 944 1264 944 1184 WIRE 960 304 864 304 WIRE 992 592 944 592 WIRE 992 1056 944 1056 WIRE 1024 16 832 16 WIRE 1024 96 1024 16 WIRE 1024 208 976 208 WIRE 1024 208 1024 176 WIRE 1024 256 1024 208 WIRE 1024 384 1024 352 WIRE 1056 208 1024 208 FLAG -96 368 0 FLAG 384 160 vc1 FLAG 272 592 vc2 FLAG 272 1056 vc3 FLAG -96 160 in FLAG 336 368 0 FLAG 224 800 0 FLAG 224 1264 0 FLAG -64 592 in FLAG -80 1056 in FLAG 992 592 v2 FLAG 944 800 0 FLAG 656 592 in FLAG 992 1056 v3 FLAG 944 1264 0 FLAG 640 1056 in FLAG 656 384 0 FLAG 1024 384 0 FLAG 832 128 0 FLAG 624 208 q1 FLAG 1056 208 q2 SYMBOL res -16 176 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 1 SYMBOL voltage -96 192 R0 WINDOW 3 24 106 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 2 1u 1n 1n 0.999u 2u) SYMATTR InstName V1 SYMBOL res 16 608 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R2 SYMATTR Value 1 SYMBOL res 0 1072 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R3 SYMATTR Value 1 SYMBOL res 336 624 R0 SYMATTR InstName R4 SYMATTR Value 1 SYMBOL res 320 1088 R0 SYMATTR InstName R5 SYMATTR Value 1 SYMBOL res 448 192 R0 SYMATTR InstName R6 SYMATTR Value 1 SYMBOL cap 320 208 R0 WINDOW 123 24 92 Left 0 SYMATTR Value2 IC=2 SYMATTR InstName C1 SYMATTR Value 1n SYMBOL cap 208 656 R0 SYMATTR InstName C2 SYMATTR Value 1n SYMBOL cap 208 1120 R0 SYMATTR InstName C3 SYMATTR Value 1n SYMBOL res 736 608 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R7 SYMATTR Value 1 SYMBOL res 928 624 R0 SYMATTR InstName R8 SYMATTR Value 1 SYMBOL res 720 1072 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R11 SYMATTR Value 1 SYMBOL res 928 1088 R0 SYMATTR InstName R12 SYMATTR Value 1 SYMBOL npn 720 256 M0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL npn 960 256 R0 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL res 640 80 R0 SYMATTR InstName R9 SYMATTR Value 10k SYMBOL res 1008 80 R0 SYMATTR InstName R10 SYMATTR Value 10k SYMBOL res 688 224 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R13 SYMATTR Value 50k SYMBOL res 880 224 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R14 SYMATTR Value 50k SYMBOL voltage 832 16 R0 SYMATTR InstName V2 SYMATTR Value 5 TEXT -144 -128 Left 0 ;.tran 0 100u 0 10n TEXT -104 976 Left 0 !.IC V(vc3)=2 TEXT -80 512 Left 0 !.NODESET V(vc2)=2 TEXT -104 16 Left 0 ;Example 1: Use IC within capacitor. \nIt requires UIC in .TRAN command to become effective.\n+RightMouseClick on C1 to set e.g. IC=2 TEXT -88 472 Left 0 ;Example 2: Use of .NODESET. It needs UIC in .TRAN command. It doesn't work on a pure resistive node. TEXT -104 888 Left 0 ;Example 3: Use of .IC. It works with and without UIC if a capacitor is on the node. \nIt only works without UIC on a pure resistive node. TEXT -144 -96 Left 0 !.tran 0 100u 0 10n uic TEXT -152 -376 Left 0 ;Setting Initial Conditions In A (.TRAN)-Simulation\n \nThe examples showing the use of .IC, .NODESET and IC with a capacitor.\n \nThe parameter UIC skips the initial operating point calculation before a .TRAN simulation. TEXT 656 528 Left 0 !.NODESET V(v2)=2 TEXT 656 992 Left 0 !.IC V(v3)=2 TEXT 664 -40 Left 0 ;.ic V(q2)=5 TEXT 832 -40 Left 0 !.nodeset V(q2)=5 TEXT 528 -184 Left 0 ;.IC and .NODESET work for this bistable circuit \nif no UIC is used. Both don't help if UIC is used.\nAnother chance to start with a defined state is \nto break the symmetrie, e.g. make R13 unequal R14. RECTANGLE Normal 1072 832 -160 432 RECTANGLE Normal 1072 1296 -160 864 RECTANGLE Normal 528 400 -160 -16