Question

what is an analog system?

what is an digital system?

which one is better the analog or digital and why?

Answer 1

There are two types of systems for transmitting information through electric signals:

1.Analog system

2.Digital system

1.Analog system: Analog system is a continuous signal which represents physical measurements. It uses continuous range of values to represent information to be transmitted. It is any continuous signal for which the time varying feature of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal. The graph of the analog signal is the sine graph.i.e sine waves are used to represent the waveform of the signal. Examples of analog system are human voice in air, analog electronic devices. Analog signal processing can be done in real time and it consumes less bandwidth.

2.Digital System: The digital system uses discrete i.e. discontinuous values. Although digital representations are discrete, the information represented can be either discrete, such as numbers or letters, or continuous, such as sounds, images, and other measurements of continuous systems. These are the signals generated by digital modulation. To denote and graphically represent the digital signals square waves are used. For example computers, CDs, DVDs, and other digital electronic devices.

As the analog signals are continous in comparison to the discrete signlas of digital system, the analog systems are far better than digital systems.