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# EE PROFESSIONS SEMINAR EE 101

UK
GPA 3.81

Staff

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COURSE
PROF.
Staff
TYPE
Class Notes
PAGES
7
WORDS
KARMA
25 ?

## Popular in Electrical Engineering

This 7 page Class Notes was uploaded by Adaline Pollich on Friday October 23, 2015. The Class Notes belongs to EE 101 at University of Kentucky taught by Staff in Fall. Since its upload, it has received 11 views. For similar materials see /class/228321/ee-101-university-of-kentucky in Electrical Engineering at University of Kentucky.

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Date Created: 10/23/15
Circuit Laws and Simulation Program With Integrated Circuit Emphasis SPICE Ohm s Law Kirchhoff s Voltage Law Single loop circuits SPICE simulation Kevin D Donohue University of Kentucky Ohm s Law The relationship between voltage and current through a material characterized by resistance is given by Ohm s Law szxi Resistive elements will KT always absorb power ie convert electric energy to heat V0 Kevin D Donohue University of Kentucky Units for Resistance Resistance can be characterized in units of ohms 1V RIQ 1A Kevin D Donohue University of Kentucky Single loop circuits The current in a single loop circuit is the same everywhere The sum of the voltage drops over resistors in a single loop circuit equals the voltage rises from the voltage sources V 10 Sum of voltages I 220 V1 V2 V3 10 Q Substitute Ohm s Law 220 V V2 50 9 220 1010 5010 4010 Solve for 10 V3 W mi 409 105040 22A Kevin D Donohue University of Kentucky Spice Analysis The previous circuit can be described graphically in SPICE and analyzed using the OP operating point simulation Steps in using BZSPICE B2 SPICE Workshop Paste circuit elements into workspace including voltmeters and ammeters using the Devices menu option Connect elements in proper con guration using the wire tool Voltmeters are wired in parallel with the elements whose voltage is to be measured and Ammeters are wired in series with the elements whose current is to be measured hooking up the meters wrong could cause the whole circuit to fail Set element properties by selecting the element in the workspace and use the Edit menu option to select the Edit Simulation Model feature A eld will appear to set values for the resistors and set the type and value of the source Meters do not need to be set Then indicate the type of simulation required by using the Simulation menu option and select the Set up simulations feature Check the OP operating point simulation only and then run the simulation Kevin D Donohue University of Kentucky Spice Example Analyze the previous circuit in SPICE Find the current in the loop and voltage drops across all resistors Using the edit simulation model feature set the source to DC and indicate a value of 220 Likewise set resistors to appropriate values Include a ground at the base of the source and wire up meters Run the OP simulation and circuit is pasted below after simulation is nished Kevin D Donohue University of Kentucky SPICE Homework Problem Must simulate 3 different circuits for R0 20 and 2000 ohms For R0 remove the resistor and replace with a Wire otherwise SPICE will generate an error Battery 20 Q 1 12v R V Kevin D Donohue University of Kentucky

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