1. CIRCUITS by Ulaby & Maharbiz
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1. Circuit Terminology
CIRCUITS by Ulaby & Maharbiz

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3. Chapter 1: Circuit Terminology
Electronics
Devices – active vs. passive
Circuits
Systems
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4. Cell-Phone Architecture
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5. Units, Multiples, Notation
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Units, Multiples, Notation

6. Tech Brief 1: Micro- and Nanotechnology
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Tech Brief 1: Micro- and Nanotechnology

7. Tech Brief 1: Moore’s Law
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Tech Brief 1: Moore’s Law

8. Tech Brief 1: Micro- and Nanotechnology
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Tech Brief 1: Micro- and Nanotechnology

9. Tech Brief 1: Heat power Density by CPU
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10. Circuit Representation
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11. Common Circuit Elements
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12. Circuit Topology Branch: single element, such as a resistor or source
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Circuit Topology
Branch: single element, such as a resistor or source
Node: connection point between two or more branches
Extraordinary Node: connection point between at least 3 branches
Loop: closed path in a circuit
node
branch
loop

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Terminology

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Planar Circuits
Planar circuits: can be drawn in 2-D without branches crossing each other
Whenever possible, re-draw circuit to simplify!

15. Charge & Current Unit of charge = coulomb
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16. Electron Drift Response time = 0.2 microsecond
Actual travel time = 10 days!!
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17. Current All rights reserved. Do not reproduce or distribute.
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18. Example 1-1: Charge Transfer
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Example 1-1: Charge Transfer
Given:
Solution:
Determine: (a) q(t)
(b)

19. Example 1-1: Charge Transfer (cont.)
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Example 1-1: Charge Transfer (cont.)
(b)

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Voltage & Power

21. Reference/Ground Choose reference point for potential
Assign potential at reference = 0, called ground
Now all potentials are relative to ground terminal
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22. Measuring Voltage & Current
Voltmeter: measures voltage without drawing current
Ammeter: measures current without dropping voltage
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23. Open Circuit & Short Circuit
Open circuit: no path for current flow (R = )
Short circuit: no voltage drop (R = 0)
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24. Power Rate of expending or absorbing energy Units: watts
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Power
Rate of expending or absorbing energy
Energy conservation
Units: watts
One watt = power rate of one joule of work per second. 1 W = 1 A x 1 V

25. Passive Sign Convention
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26. Example 1-4: Energy Consumption
Given: Resistor consuming 20 W before switch turned off at t = 0.
Also
Determine: Total energy consumed by resistor after t = 0.
Solution:
(before t = 0)
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27. Circuit Elements: Independent Sources
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Circuit Elements: Independent Sources

28. Circuit Elements: Dependent Sources
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Circuit Elements: Dependent Sources

29. I-V for Sources Current/voltage fixed for independent sources
What does a non-ideal source look like?
Dependent sources vary with reference voltage/current
What are units for slope?
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30. Equivalent Circuit Using Dependent Source
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31. Example 1-5: Dependent Source
Given:
Source is CCVS
Determine:
Solution:
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32. Switches All rights reserved. Do not reproduce or distribute.
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33. Summary
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