HYSTERESIS SWITCHING CIRCUIT

.SUBCKT ECLINV 1 2 3
	QINP 4 1 5 ECL
	QREF 6 3 5 ECL
	QOUT 0 4 2 ECL
	RINP 0 4 217
	RREF 0 6 245
	REE  5 7 777
	VPOW 7 0 -5.2
    .MODEL ECL NPN BF=50 IS=1E-14
.ENDS

XINV1 1 2 3 ECLINV
RXX2 2 7 1K
CXX2 2 7 10N
VEE  7 0 -5.2
VIN 1 0 -2.5
VBB 3 0 -2.5
.DC VIN -1.7 -0.7 0.02 VBB -1.2 -1.4 .1
.PRINT DC V(1) V(2) V(3)

*.MODEL ECL NPN BF=50 IS=1E-14
.OPTION NOMOD LIMPTS = 1000
.WIDTH OUT = 72
.END