Computer Logical Organization Introduction - Computer Logical Organization

Overview of Computer Logical Organization

Digital electronics, for the past several years was in use for the computer system. As time pass, other applications also started to accept and use the concept of digital electronics.

Digital electronics is widely and heavily used in the following areas:

  • Industrial process control
  • Military system
  • Television
  • Communication system
  • Medical equipment
  • Radar
  • Navigation

What is a Signal?

One or more than one independent variable that carries some information along with it is known as Signal.

There are two types of signals:

  • Analog Signal
  • Digital Signal

What is Analog Signal?

The variable that carries continuous, infinite and different values is known as Analog signal.

The flowing are some of the examples of Analog signal:

  • Temperature
  • Pressure
  • Distance
  • Sound
  • Voltage
  • Current
  • Power

Graphical representation of Analog Signal (Temperature)

Analog Signal

Analog systems or analog circuits enable to process the analog signals.

The following are some of the examples of Analog system:

  • Filter
  • Amplifiers
  • Television receiver
  • Motor speed controller

What are the disadvantagesof Analog Systems?

  • Accuracy is low
  • The degree Versatility is low
  • The effect of noise is more
  • The effect of distortion is more
  • The weather is affected very badly.

What is Digital Signal?

The variable that carries finite number of signals is known as Digital Signal, which is a not continuous signal. For instance, consider the digital electronic calculator; switches are used for providing the input. The inputs get converted into electrical signal. The electrical signal possesses two discrete values – low level values and high level values. Any one among these is represented as Digital signal.

The following are the examples of Digital Signal:

  • Binary Signal
  • Octal Signal
  • Hexadecimal Signal

Graphical representation of the Digital Signal (Binary)

Digital Signal

Digital systems or circuits enable to process the digital signals.

The following are the examples of Digital systems:

  • Registers
  • Flip-flop
  • Counters
  • Microprocessors

What are the advantagesof Digital Systems?

  • Accuracy is more
  • Versatility is high
  • The effect of distortion is low.
  • Communication is made easy
  • Facilitates for information storage.

What are the differences between Analog and Digital Signal?

The following are the differences between Analog and Digital Signals:
S.N.
Analog Signal
Digital Signal
1
Analog signal has infinite values.
Digital signal has a finite number of values.
2
Analog signal is continuous.
Digital signal is discrete.
3
Signal generators and transducers help in generating Analog signal.
A to D converter helps in generating Digital signal.
4
Example of analog signal − sine wave, triangular waves.
Example of digital signal − binary signal.

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