What is the fundamental Digital Design?

Digital design is distinct through analog design. In analog circuits we deal along with physical signals that are continuous in amplitude and time. For example, biological data, sensor output, sesimic signals and audio-video.

Digital design onto the other hand is easier to function and has great immunity to noise. There is no room for automation into analog design as each application needs a different design while digital design can be automated.

Digital Circuits conversely deal with only two logic levels 0 and 1(Is this fact that as per quantum mechanics there is a third logic level?) deal along with lot more transistors for an exact logic, easier to design complex designs, greater speed and flexible logic synthesis though at the cost of greater power. It is less sensitive to noise design and analysis of these circuits is dependent onto the clock challenge lies into negating the timing and load delays and making sure there is no set up or hold violation.