Download Networks I for M.E. ECE 09.201 - 2

Networks I for M.E.
ECE 09.201 - 2
James K. Beard, Ph.D.
Rowan Hall 238A
[email protected]
http://rowan.jkbeard.com
September 12, 2006
Networks I
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Today’s Learning Objectives –
 Analyze
DC circuits with passive elements
including: resistance
 Learn about switches
 Introduce KVL and KCL
 What is voltage and current division?
 Parallel and series sources
 Solve some more difficult problems
September 12, 2006
Networks I for M.E.
Slide 2
chapter 2 - overview
engineering and linear models - done
 active and passive circuit elements - done
 resistors – Ohm’s Law - done
 dependent sources – done
 independent sources – done
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 transducers – done
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switches – in progress
September 12, 2006
Networks I for M.E.
Slide 3
Switches
Make before break
SPST
SPDT
SPDT
September 12, 2006
Networks I for M.E.
Slide 4
examples
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Exercises 2-9.1 and 2-9.2
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p. 40
September 12, 2006
Networks I for M.E.
Slide 5
Homework 2 - problem 2.9-1
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see p. 50
September 12, 2006
Networks I for M.E.
Slide 6
ch. 1 & 2 important concepts
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Circuits; current; voltage; power
Passive sign convention
Active and Passive elements
Linearity - superposition + homogeneity
Resistors and Ohm’s Law
Sources - Ideal, independent and dependent
Opens and Shorts
Switches
September 12, 2006
Networks I for M.E.
Slide 7
chapter 3 - overview
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electric circuit applications
define: node, closed path, loop
Kirchoff’s Current Law
Kirchoff’s Voltage Law
a voltage divider circuit
parallel resistors and current division
series V-sources / parallel I-sources
resistive circuit analysis
September 12, 2006
Networks I for M.E.
Slide 8
electric circuit applications
electric telegraph
 transatlantic cable
 engineers vs. scientists
 those who can do, those who can’t
teach?
 excerpt from the history of electricity
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September 12, 2006
Networks I for M.E.
Slide 9
resistive circuits
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we are ready to make working circuits with
resistive elements and both independent and
dependent sources.
words we know: short, open, resistor
new words:
 node
 closed
path
 loop
September 12, 2006
Networks I for M.E.
Slide 10
more definitions
node: a junction where two or more are
connected
 closed path: a traversal through a
series of nodes ending at the starting
node
 loop:
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September 12, 2006
Networks I for M.E.
Slide 11
an illustration
R1
NODE
V
+
–
PATH OR LOOP
R2
ARE THESE TWO NODES OR ONE NODE?
September 12, 2006
Networks I for M.E.
Slide 12