ABSTRACT
This chapter looks at the most popular standard switch configurations, including multiplexers, switch arrays and crosspoints. It provides an overview of the types of functions available as standard integrated circuits, and to guide the reader to some of the reasons and applications for these various functions. The single-pole, double-throw function requires two switches, but there is only one logic input controlling the two switches. The dual single-pole, double-throw, as with any of the dual switch functions, facilitates the control of differential signals for improved common-mode signal rejection, and for routing and switching of signals that travel in pairs, such as stereo audio signals. The level of integration continues to increase with the development of the multiplexer (MUX) /amplifier function. These devices have been developed to meet the need for buffers in high frequency systems like video routing equipment. An additional drain output is required because the two four-channel MUXes have separate outputs.
