ABSTRACT
The control based on programmable digital devices such as programmable logic devices (PLDs), microprocessors/controllers (henceforth, μ-controllers), and digital signal processors (DSPs) is used widely for numerous applications ranging from home appliances to industry products. DSPs are adopted for system controllers due to their fast operation speed through dedicated arithmetic units with multipliers and fast analog-to-digital converters and digital-to-analog converters. Their fast operation is thought to be suitable enough for replacing the existing analog controllers. Of course, there are still intrinsic limitations in a digital controller’s bandwidth, compared to the classical analog controllers. In many applications, however, system designers can select either appropriate μ-controllers or DSPs with enough performance. In addition, programmable controllers provide the flexibility of easily implementing unexpected conditions.
