Voltage-Controlled Switch Issue

[yejunap]

I implement the circuit above.

• Voltage-Controlled Switch Example

sw 0 out in 0 mysw
v1 in 0 type=pulse 0 1.0 0 0.5m 0.5m 0 1m
v2 net1 0 type=vdc vdc=3.3
r1 net1 out 1k

.model sw mysw vt=0.5 vh=0.4 ron=1 roff=1Meg
*.model sw mysw von=0.9 voff=0.1 ron=1 roff=1Meg
.tran tstep=100n tstop=3m
.plot tran v(in) v(out)
.end

Ver. 0.18
From the document, the resistance of the switch should changes from VT+VH to VT-VH (distance 2*VH)

However, the turn-on voltage is 0.9 and turn-off voltage is the same.
The hysteresis is not available.

[itdaniher]

Hi @yejunap

Thanks for your interest in ahkab! I'm looking at switch.py to try and get to the bottom of your missing hysteresis issue. On first pass, it looks OK. I'll try and reproduce in pure Python to see if it's a netlist parsing issue or something.

Regards,
Ian