ABSTRACT
Many devices are available on the market specifically designed for logic level translation, such as line drivers and FET drivers; however, the flexibility of the analog switch in handling a wide range of input and output levels will often make it the best device for unusual level translation applications. The P-channel enhancement MOSFET is often used as a complement to the N-channel DMOS device to deliver power from the positive supply to the load. The enhancement-mode FET is a device that is normally-OFF; that is, in the absence of any gate source voltage with zero current flowing through the channel. The N-channel enhancement MOSFETs are the most commonly used FET devices for power switching, and are available in a wide range of voltage and current capacitities. Cross-conduction may be a problem with the discrete devices if both are allowed to be ON simultaneously as the driver transitions through the middle of the analog gate drive voltage range.
