Chapter 13
Filters and transfer functions
Typical MCQ’s
•
Given the circuit diagram, determine the type of passive filter
•
Given the circuit diagram, determine the type of active filter
•
Given the circuit diagram, calculate the transfer function of a passive filter (either
at the given frequency or determine the cutoff frequency)
•
Given the circuit diagram, calculate the transfer function of an active filter (either
at the given frequency or determine the cutoff frequency)
Concepts & Strategies
•
Passive filters contain only resistors, inductors and/or capacitors; in this course,
we consider filters where all elements are connected in series: they can be reduced
to voltage dividers.
•
Active filters contain Op Amps (with power supplies) in addition to resistors,
inductors and/or capacitors; in this course, we consider circuits that can be
reduced to inverting amplifiers.
•
Transfer function
H
"
(
)
=
V
output
"
(
)
V
input
"
(
)
is defined as the ratio of the sinusoidal
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 Spring '07
 Ganago
 Highpass filter, Bandpass filter, Lowpass filter, A. Ganago

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