ABSTRACT

An electrical/electronic system is a group of components connected together to perform a desired address

system, where a microphone is used to collect acoustic energy in the form of sound pressure waves and converts this to electrical energy in the form of small voltages and currents; the signal from the microphone is then amplified by means of an electronic circuit containing transistors/integrated

A sub-system is a part of a system which performs an identified function within the whole system; the amplifier in Fig. 2.1 is an example of a sub-system

A component or element is usually the simplest part of a system which has a specific and welldefined function – for example, the microphone in Fig. 2.1

The illustration in Fig. 2.1 is called a block diagram and electrical/electronic systems, which can often be quite complicated, can be better understood when broken down in this way. It is not always necessary to know precisely what is inside each sub-system in order to know how the whole system functions.