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Welcome
Welcome
University of Gondar
Department of Electrical and Computer Engineering
Course: Signal and Systems Analysis
by Mr.Admasu Y.
Welcome
Welcome
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SIGNALS
A signal is a function representing a physical quantity or
variable, and typically it contains information about the
behavior or nature of the phenomenon.
For instance, in a RC circuit the signal may represent the
voltage across the capacitor or the current flowing in the
resistor.
Mathematically , a signal is represented as a function of an
independent variable t. Usually t represents time. Thus, a
signal is denoted by x(t).
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We encounter many types of signals in various applications.
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Electrical signals : voltage, current, magnetic and electric
fields,. . .
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Mechanical signals : velocity, force, displacement,
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Thermodynamic signals : temperature, enthalpy,
entropy,
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Acoustic signals : sound and vibration.
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BASIC OPERATIONS 0N SIGNALS
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Amplitude scaling
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Time scaling
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Signal Addition
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Signal Multiplication
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Classifications of Signal
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Systems
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Classifications of Systems
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