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1. Circuit Terminology. CIRCUITS by Ulaby & Maharbiz. Overview. Chapter 1: Circuit Terminology. Electronics Devices – active vs. passive Circuits Systems. Cell-Phone Architecture. Units, Multiples, Notation. Tech Brief 1: Micro- and Nanotechnology.

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1 circuit terminology

1. Circuit Terminology

CIRCUITS by Ulaby & Maharbiz

chapter 1 circuit terminology
Chapter 1: Circuit Terminology
  • Electronics
    • Devices – active vs. passive
    • Circuits
    • Systems
charge current
Charge & Current
  • Unit of charge = coulomb
electron drift
Electron Drift

Response time = 0.2 microsecond

Actual travel time = 10 days!!

example 1 1 charge transfer
Example 1-1: Charge Transfer
  • Given:

Solution:

Determine: (a) q(t)

(b)

reference ground
Reference/Ground
  • Choose reference point for potential
  • Assign potential at reference = 0, called ground
  • Now all potentials are relative to ground terminal
measuring voltage current
Measuring Voltage & Current
  • Voltmeter: measures voltage without drawing current
  • Ammeter: measures current without dropping voltage
open circuit short circuit
Open Circuit & Short Circuit
  • Open circuit: no path for current flow (R = )
  • Short circuit: no voltage drop (R = 0)
power
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

example 1 4 energy consumption
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)

i v for sources
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?
example 1 5 dependent source
Example 1-5: Dependent Source
  • Given:

Source is CCVS

Determine:

Solution:

tech brief 2 moore s law1
Tech Brief 2: Moore’s Law
  • Challenges to Continuation of Moore’s Law
  • Heat dissipation
  • Size (approaching atomic dimensions)
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