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Voltage Controlled Switch

Symbol

Description

Voltage Controlled Switch

The switch state is controlled by the voltage difference between control pins CP and CN.

Switching Behavior:

  • Closes when V(CP-CN) ≥ Vt + Vh
  • Opens when V(CP-CN) ≤ Vt - Vh
  • When Vh = 0: Sharp threshold at Vt (no hysteresis)
  • When Vh > 0: Hysteresis behavior prevents oscillations near threshold

Resistance Behavior:

  • OnResistance (Ron): Resistance when closed. If Ron ≤ 0, acts as ideal short circuit (zero resistance)
  • OffResistance (Roff): Resistance when open. If Roff ≤ 0, acts as ideal open circuit (infinite resistance)

Library

Electrical > Switches

Pins

Name Description
P Positive Pin (●)
N Negative Pin
CP Control Positive Pin - Measures voltage difference V(CP-CN) for switch control
CN Control Negative Pin - Reference for voltage measurement V(CP-CN)