# Switch

• Library:
• RF Blockset / Circuit Envelope / Junctions

## Description

The switch block models a two terminal switch. The input Simulink® signal, Vctl , controls the transfer of the RF Blockset™ signal from the `In` terminal to the `Out` terminal.

If the control voltage is less than the threshold voltage, the block attenuates the signal using the resistance value specified in Off resistance between the input and output terminals. If the control voltage is greater than the threshold voltage, the block passes the signal using the resistance value specified in On resistance between the input and output terminals.

## Ports

### Input

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Simulink control signal, specified as a scalar.

Data Types: `double`

## Parameters

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On resistance value of the switch, specified as a positive scalar in ohms.

Off resistance value of the switch, specified as a positive scalar in ohms.

Threshold voltage of the switch, specified as a scalar in volts.

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