Electric Circuits and Networks, Ist Edition by Pearson

Why Sinusoids?

Sinusoidal

waveforms and

sinusoidal steady-state

analysis of circuits is of

great importance to

electrical and

electronic circuits due

to the following reasons:

• Sinusoidal waveforms

preserve their wave-

shape in linear

circuits.

• Sinusoidal waveform

render the voltage

levels in electrical

and electronic

systems flexible so

that optimisation of

sub-system

performance in

various parts of the

system by choosing a

suitable voltage level

in that part of the

system becomes

possible. Transformers

help us to realise this

voltage flexibility.

• Periodic non-

sinusoidal waveforms

as well as a broad

class of aperiodic

waveforms can be

expressed as a sum

of sinusoids by ...