SPnT
Single pole multiple throw switch
- Library:
RF Blockset / Circuit Envelope / Junctions
Description
The SPnT block models a single pole multiple throw switch. This block
supports both reflective and absorptive switches. You can specify two to eight output
ports for the switch. The control signal is a Simulink® signal connected to the Ctl port of the block. The
control signal specifies which output port transmits the input signal. When the input to
the Ctl port is between one and the number of output ports, the
Ctl signal value is rounded to the nearest integer. The output
port that corresponds to the integer value transmits the data. If the rounded
Ctl signal value does not correspond to any of the output ports,
then all the output ports are turned off.
Ports
Input
Parameters
Model Examples
More About
Reflective and Absorptive SPnT Switches
If there is no internal resistor connected in parallel to the load when the output terminal is turned off, any incident signal at the output side is reflected back to its source. This type of switch is known as reflective switch.
If there is a matching internal resistor connected in parallel to the load when the output terminal is turned off, any incident signal at the output side is absorbed by the switch. This type of switch is known as an absorptive switch.
References
[1] Razavi, Behzad. RF Microelectronics. Upper Saddle River, NJ: Prentice Hall, 2011.