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by: JD Notetaker

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# Electrical Engineering 101 notes ELCT 101 001

JD Notetaker
USC

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These notes cover some of the basics of Electrical Engineering
COURSE
Electrical and Electronics Engineering
PROF.
Dr. Ali
TYPE
Class Notes
PAGES
1
WORDS
CONCEPTS
formulas, concepts, electrical engineering, volt, ohms
KARMA
25 ?

## Popular in Electrical Engineering

This 1 page Class Notes was uploaded by JD Notetaker on Wednesday October 5, 2016. The Class Notes belongs to ELCT 101 001 at University of South Carolina taught by Dr. Ali in Fall 2016. Since its upload, it has received 6 views. For similar materials see Electrical and Electronics Engineering in Electrical Engineering at University of South Carolina.

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Date Created: 10/05/16
Electrical Engineering notes: Current, voltage and power:  Electric current means flow or movement of charge. A battery connection to a resistor or led using conducting wires  Current can flow through conductors such as copper, gold or silver (most conductive). It can also occur in semiconductors  DC current means that the current magnitude does not change with time. AC current means that the current magnitude changes with time. Power is found by taking the product of the voltage and the current concerned  Materials of relevance in EE can be classified into several broad classes: conductors, semiconductors, magnetic, and dielectric or insulting  Examples of each: Conductivity (s/m) – conductivity of copper, resistivity (ohm*m)  R=P(l/A) R-Resistance, P-velocity, l-length, A-area((pi)r^2)  10log 10mm) -> Pmm  Db -> 10log (10/P2) Link budget calculation assumptions: 1. Free space 2. direct line of sight 3. aligned antennas 4. far field (one antenna cannot modify the behavior of the other antenna) Isotropic gain is 1 or 0 dB 10log 10) -> dB gain X = 10 (dB gain/numeric An efficient antenna that has good gain is typically An oscillator circuit generates a signal with a specific frequency A mixer circuit mixes to frequencies  At its output it generates a whole bunch of frequencies  You use a filter to filter out the undesired ones RF oscillator may mean the signal you receive in your e.g. mobile phone antenna  What is the frequency? Local oscillator means an actual oscillator Si diodes -> U B 0.6V G dioees -> U = 0.3B P -> holes -> analogous to positive charges; n -> electrons -> negative charges

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