initial commit

examples/jigs/1721.asc

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+Version 4
+SHEET 1 1236 800
+WIRE 144 64 128 64
+WIRE 240 64 208 64
+WIRE 144 160 128 160
+WIRE 240 160 240 64
+WIRE 240 160 224 160
+WIRE 320 160 240 160
+WIRE 416 160 400 160
+WIRE 48 256 48 240
+WIRE 304 256 304 224
+WIRE 240 272 240 160
+WIRE 272 272 240 272
+WIRE 416 288 416 160
+WIRE 416 288 336 288
+WIRE 448 288 416 288
+WIRE 272 304 240 304
+WIRE 160 320 160 304
+WIRE 304 336 304 320
+WIRE 48 352 48 336
+WIRE 160 416 160 400
+WIRE 240 416 240 304
+WIRE 240 416 160 416
+WIRE 256 416 240 416
+WIRE 416 416 416 288
+WIRE 416 416 400 416
+WIRE 160 432 160 416
+WIRE 160 528 160 512
+FLAG 48 352 0
+FLAG 48 240 +V
+FLAG 304 224 +V
+FLAG 160 304 +V
+FLAG 160 528 0
+FLAG 128 64 0
+FLAG 304 336 0
+FLAG 128 160 0
+FLAG 448 288 OUT
+SYMBOL voltage 48 240 R0
+SYMATTR InstName V1
+SYMATTR Value 3.3
+SYMBOL misc\\xtal 320 400 R90
+WINDOW 0 0 32 VBottom 2
+WINDOW 3 32 32 VTop 2
+SYMATTR InstName C1
+SYMATTR Value 1.6p
+SYMATTR SpiceLine Rser=45 Lser=15.6m Cpar=6p
+SYMBOL res 144 416 R0
+SYMATTR InstName R1
+SYMATTR Value 620
+SYMBOL res 144 304 R0
+SYMATTR InstName R2
+SYMATTR Value 2K
+SYMBOL res 416 144 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R3
+SYMATTR Value 2K
+SYMBOL cap 208 48 R90
+WINDOW 0 0 32 VBottom 2
+WINDOW 3 32 32 VTop 2
+SYMATTR InstName C2
+SYMATTR Value .1<EFBFBD>
+SYMBOL res 416 400 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R4
+SYMATTR Value 220
+SYMBOL res 240 144 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R5
+SYMATTR Value 1.8K
+SYMBOL Comparators\\LT1721 304 224 R0
+SYMATTR InstName U1
+TEXT 336 488 Left 2 !.tran 250u startup
+TEXT 392 16 Bottom 2 ;2.7 to 6V Crystal Oscillator with TTL/CMOS Output