A switch routes a signal between different paths, by breaking or creating connectivity.
A switch is specified in terms of number of poles (number of terminals on a port) and number of throws (number of alternative positions). Thus a single pole double throw (SPDT) switch would toggle a one terminal connnection between two possible positions.
Switches may be absorptive or reflective. An absorptive switch provides a termination, often 50 ohms, to the unconnected port. A reflective switch leaves the unconnected port open-circuited.
Agilent Technologies Products for Switch Applications
- Discrete Devices:
- PIN Diodes
- Integrated Circuits:
- comparison of Switch ICs