Version 4
SHEET 1 1656 1100
WIRE 528 304 576 304
WIRE 320 304 384 304
WIRE 608 304 608 336
WIRE 608 400 608 416
WIRE 384 336 384 304
WIRE 384 304 416 304
WIRE 208 304 240 304
WIRE 576 304 608 304
WIRE 176 304 208 304
WIRE 928 416 928 400
WIRE 800 304 832 304
WIRE 848 304 848 336
WIRE 848 400 848 416
WIRE 928 208 928 320
WIRE 832 304 848 304
WIRE 384 208 384 304
WIRE 544 208 608 208
WIRE 608 208 608 304
WIRE 416 304 464 304
WIRE 464 208 384 208
WIRE 672 208 672 304
WIRE 672 304 720 304
WIRE 928 208 848 208
WIRE 768 208 672 208
WIRE 176 304 176 240
WIRE 176 96 208 96
WIRE 928 96 928 208
WIRE 384 416 384 400
WIRE 608 304 672 304
WIRE 176 160 176 96
WIRE 208 96 928 96
FLAG 384 416 0
FLAG 608 416 0
FLAG 208 304 1
FLAG 416 304 2
FLAG 576 304 3
FLAG 928 416 0
FLAG 848 416 0
FLAG 832 304 i
FLAG 208 96 4
SYMBOL Misc\\xtal 528 288 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
WINDOW 39 80 32 VTop 0
WINDOW 123 56 32 VTop 0
WINDOW 40 104 32 VTop 0
SYMATTR InstName X1
SYMATTR Value .0127pF
SYMATTR SpiceLine Rser=200
SYMATTR Value2 Lser=2H
SYMATTR SpiceLine2 Cpar=4pF
SYMBOL cap 400 336 M0
WINDOW 0 32 16 Left 0
WINDOW 3 32 48 Left 0
SYMATTR InstName C2
SYMATTR Value 100p
SYMBOL cap 592 336 R0
WINDOW 0 32 16 Left 0
WINDOW 3 32 48 Left 0
SYMATTR InstName C3
SYMATTR Value 10p
SYMBOL res 336 288 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 3k3
SYMBOL res 864 192 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 3.3Meg
SYMBOL bi 928 400 M180
WINDOW 0 39 48 Left 0
WINDOW 3 40 24 Left 0
WINDOW 123 40 0 Left 0
SYMATTR InstName Bo
SYMATTR Value I=limit(30*(2.5-V(i)),0,5)
SYMATTR Value2 Rpar=1 tripdt=1n
SYMBOL res 816 288 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName Ri
SYMATTR Value 100
SYMBOL current 464 208 M90
WINDOW 0 -32 32 VBottom 0
WINDOW 3 -56 32 VBottom 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I2
SYMATTR Value PULSE(0 23 100n 10n 10n 10n 1u 1)
SYMBOL zener 864 400 R180
WINDOW 0 40 48 Left 0
WINDOW 3 40 16 Left 0
SYMATTR InstName Di
SYMATTR Value Clamp
SYMBOL voltage 176 144 R0
WINDOW 0 40 48 Left 0
WINDOW 3 40 71 Left 0
WINDOW 123 40 72 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value ""
SYMATTR Value2 AC 1
TEXT 128 464 Left 0 !.tran 0 10m 100u 10n
TEXT 128 496 Left 0 !.ac lin 1000 990k 1010k
TEXT 848 464 Center 0 !.model Clamp D(Vfwd=.5 Vrev=5.5)
TEXT 560 16 Center 0 ;1MHz Crystal Oscillator
TEXT 976 288 Left 0 ;Unbuffered Gate
TEXT 560 64 Center 0 ;NOTE: for ac loop gain is V(4)/V(1)