ME 140L - PreLab Lecture 3

ME 140L - PreLab Lecture 3 - Low Pass Filters The Gain...

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LAB 3: FIRST ORDER CIRCUITS University of Texas at Austin Department of Mechanical Engineering ME 140L
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Lab Overview Introduction of Lab Components First-order circuits RC and RL circuits Low Pass Filters
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Introduction of Lab Components Resistors 200 (red - black - brown)
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Introduction of Lab Components 1 Capacitor: 100 nF
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Introduction of Lab Components 1 Inductor: 1 mH
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RC Circuits A Step Response of RC Circuit A RC Circuit
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RC Circuits Charging Voltage Discharging Voltage Time constant τ =RC ) 1 ( ) ( RC t in c e V t V - - = RC t in c e V t V - = ) (
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RL Circuits A RL Circuit A Step Response of RL Circuit
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RL Circuits Charging Voltage Time constant τ =L/R L Rt in L e V t V - = ) ( V in τ O 0.37V in τ V t -0.37V in - V in
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Low Pass Filters Low pass filters are used to attenuate high frequencies. RC and RL circuits are two types of passive filters. RC Circuit - Vc = Low Pass Filter. RL Circuit - V R = Low Pass Filter.
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Unformatted text preview: Low Pass Filters The Gain Cutoff frequency: the frequency makes For RC circuit filter, measure V out across the capacitor. 2 1 1 1 1 1 (2 ) out in g V g g V RCf = = << + 2 1 2 2 out in V f V RC = = A Frequency Response of First-Order Filter Reference [1] G. Rizzoni. Principles and applications of Electrical Engineering McGraw Hill. 2007. [2] J. Nilsson, S.A. Riedel. Electric Circuits Prentice Hall. 2005 [3] R.E. Thomas, A.J. Rosa. The analysis and design of linear circuits John Wiley & sons. 2006 [4] A. Robbins, W.C.Miller. Circuit Analysis Theory and Practice Delmar Thompson Learning. 2000. http://en.wikipedia.org/wiki/Image:Resonanzueberho ehung.png...
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ME 140L - PreLab Lecture 3 - Low Pass Filters The Gain...

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