ABSTRACT
Most of the electronic systems in use nowadays are a mixture of digital signals with analog signals. Semiconductor devices used in designing an electronic system are generally minor integrated circuits, discrete components and programmable devices, whereas the majority of the programmable devices are either digital or analog ones alone, which necessitates the connection of other external devices when building up a system and thus complicates the system design. In such cases, the essential requirements for system design are diluted since a lot of eort is spared for building systems and removing troubles.
