Regarding the pspice voltage-controlled switch, the low level cannot be turned off

18772964987

Regarding the pspice voltage-controlled switch, the low level cannot be turned off [Copy link]

Regarding the problem that the low level cannot turn off the pspice voltage-controlled switch: According to the principle of the pspice voltage-controlled switch, as shown in the figure, the threshold of the voltage-controlled switch is set to 2v, the right end is the input and output of the access circuit, and the left end is a group of power supplies to control the switch to turn on and off (that is, when the control voltage is greater than 2v, the switch is closed, the right end is turned on and works normally; when the control voltage is less than 2v, the switch is disconnected and the right end is cut off) However, the simulation results are as follows: Low level, that is, when the control voltage is less than 2v, the switch is not turned off! ! Please help me, thank you!

小钊

Your switch is 0V cutoff, right? It should be lower than 0 or = 0, unless VH=4 (on), VT=2 (off), which is 2V off.

Lucky-Shong

Xiao Zhao posted on 2019-10-29 22:41 Your switch is 0V cutoff! It should be lower than 0 or = 0, unless VH=4 (on), VT=2 (off), this is 2V cutoff.

When the control voltage is between the turn-off voltage and the turn-on voltage of the voltage-controlled switch (VT<V<VH), I only saw a simple sentence in "pspice component model establishment and application" that "the resistance changes continuously with the voltage". Does anyone know how it changes specifically? Are the curves or trends of the switch resistance and voltage changes the same? Or where can I find relevant information? Thank you!