CH1 Systems 1

CH1 Systems 1 - EE3120 Chapter 1 Lecture 4 Introduction to...

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EE3120 Chapter 1 Lecture 4 Introduction to Systems
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Linear Systems and Signals Lecture 4: Systems Systems exist all around us, in many different forms. Some systems include: Transducer – transform signals from one form to another (voltage to acoustic) Filter – remove noise or undesired frequencies from signals amplifier – increase or decrease amplitude of a signal motors, generators, modulator, demodulator, mixer System () xt yt •input •excitation •cause •output •response •effect
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Systems In EE 3120 systems will be modeled as a “black box”. • The black box system will have at least one input terminal and one output terminal. System () k yt i x t i input signals, excitation, or cause k output signals, response, or effect SISO – single input single output system (this course) MIMO – multiple input multiple output system (other courses) Results of SISO systems can be easily applied to MIMO systems
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Systems There are three main areas of system study: mathematical modeling analysis Design This course will mainly deal with analysis, but will also cover mathematical modeling. Designing systems is left for future courses. A signal can be applied or measured at any terminal, input or output. The contents or structure of the black box may or may not be known, and can be found by observation or derivation using the physical laws of the system. Ex. Circuits can be modeled mathematically using Kirchoff’s laws.
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Classification of Systems Systems can also be classified as: causal or noncausal lumped or distributed linear or nonlinear time invariant or time varying instantaneous (no memory) or dynamic analog or digital stable or unstable invertible or nonivertible Continuous time (C-T) systems accept C-T signals and generates C-T signals Discrete time (D-T) systems accept D-T signals and generates D-T signals
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Invertible vs. Noninvertible
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This note was uploaded on 02/06/2012 for the course EE 2120 taught by Professor Aravena during the Fall '08 term at LSU.

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CH1 Systems 1 - EE3120 Chapter 1 Lecture 4 Introduction to...

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