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Outline
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Introduction
Transfer Function
Frequency Response Plot
Bode Plot
Real Poles and Zeros

Introduction
The frequency response of a circuit describes the relationships
between the amplitudes and phase angles of the input and
output sinusoids which are frequency dependant.
Bode plots is a generalizations of obtaining the frequency
response of a network based on the transfer functions.
Bode plots allow us to approximate the frequency response of a
circuit using straight line approximations and becomes the
industry standard method of presenting frequency response
information.
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Application
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Most networks behave or act as filters.
Many applications need to retain components in a given range
of frequencies and discard the components in another range.
This can be accomplished by the use of electrical networks
called filters.