EGR 277 Digital Logic

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Lecture 16 EGR 271 Circuit Theory I
Reading Assignment Sections 4.10 - 4.15 in
Electric Circuits, 6th Ed. by Nilsson
Maximum Power Transfer Theorem Recall that
and
Example Find R such that maximum power is
delivered to R. Also find Pmax.
Note that maximum power transfer problems always
require that we first find the Thevenin
Equivalent Circuit.
A) Find VOC
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Lecture 16 EGR 271 Circuit Theory I
Example (continued)
B) Find ISC
C) Find RTH VOC/ ISC
D) For what value of R is maximum power
delivered to R?
E) What is Pmax?
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Lecture 16 EGR 271 Circuit Theory I
Applications of the Maximum Power Transfer
Theorem The maximum power transfer theorem is
commonly used by engineers. Sometimes the
requirement that RL RTH is referred to as
impedance matching.
Max Power Transfer Theorem application - HF
transmitter and antenna
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Lecture 16 EGR 271 Circuit Theory I
Max Power Transfer Theorem application - stereo
amplifier and speaker
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Lecture 16 EGR 271 Circuit Theory I

• PSPICE Demonstration
• Reference
• PSPICE Assignment 2
• Read Chapters 1 - 3 in Schematic Capture Using
  Cadence PSPICE by Herniter
• Handout PSPICE Example - Maximum Power Transfer
  (Varying a Component Value)
• Handout PSPICE Example - Op Amp Circuit using a
  Library Model ( uA741)
• Handout PSPICE Example - Op Amp Example using a
  General Op Amp Model
• DC Sweep Illustrate how to vary the following
  quantities
• A voltage source
• A current source
• A resistor
• Insert the part PARAM when varying a resistor
  value.
• Use a potentiometer symbol (part R_VAR) for the
  resistor
• Be sure to change the property SET from 0.5 to 1
• PROBE Illustrate how to
• Add traces
• Add text, arrows, boxes