This document discusses the history and workings of analogue computers. It notes that early analogue computers were invented by William Thomson in 1873 and A.A Michelson in 1898. They were used for applications like gun fire control during World War II and the Korean War. Analogue computers represent quantities continuously like an analogue clock and use physical phenomena like voltages and currents to model and solve problems. They were commonly used before digital computers advanced and are still used today in applications like process control. However, digital computers can now solve equations faster and have advantages over analogue computers.

1. Signal and System
Nouman Ali:
BSEE-01143151
Saif-Ur-Rehman:
BSEE-01143137
Submission
Date:21-02-16

2. Assighment # 01
Analogue Computers

3. History of Analogue Computers
• Early analogue computer was invented by
William Thomson
in 1873.

4. History of Analogue Computers
 Second analogue computer was developed by
A.A Michelson in 1898.

5. History of Analogue Computers
• They were used for gun fire control in World
war II and the Korean war.
• Before digital computers had developed
sufficiently , analogue computers were used in
science and industry.

6. Analogue
 Analogue means continuity of quantity just like
analogue clock measures time by means of
distance.

7. Analogue Computers
 Analogue computers are form of computers that
uses the continuously changeable aspects of
physical phenomenon such as Electrical ,
Mechanical quantities for problem is solving.
 Example:
Speedometer , Thermometer e.t.c

8. Working
 Most present-day electronic analog computers
operate by manipulating potential
difference(voltages).
 Their basic component is an operational amplifier,
a device whose output current is proportional to
its input potential difference.

9. Uses
 They are frequently used to control process
such as those found in oil refinery where flow
and temperature measurements are
important.
 They are used for example in paper making
and in chemical industry.
 Analog computers are the first computers
being developed and provided the basis for
the development of the modern digital
computers.

11. Disadvantages
• Digital computers can solve equations faster
than analogue computers.
• Readings for real time is difficult to record .
• Range of analogue computers is limited and
are difficult to deal with accurately.