EE 302 - Lecture Slides - Unit_2[1].3___Circuits_and_Circuit_Elements

# EE 302 - Lecture Slides - Unit_2[1].3___Circuits_and_Circuit_Elements

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1 Unit 2: Basic Circuit Theory Unit 2.3: Circuits and Circuit Elements Chapter 2

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2 Learning Objectives Review Resistance Ohm’s Law Short circuit and open circuit Nodes, branches and loops Kirchhoff’s Voltage Law (KVL) Kirchhoff’s Current Law (KCL)
3 Review Passive sign convention An ideal voltage/current source ALWAYS provides the same voltage/current. An independent source provides voltage/current independent of rest of the circuit. A dependent source provides voltage/current that depends on some voltage/current on the rest of the circuit.

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4 Dependent Sources Output current or voltage is determined by other control voltages or currents Used to model gain Denoted by diamond shape + - 6 I b
5 Eg. Transistor Current flow is dependent on control signal (gate) Current changes based upon the value of the control signal (voltage between gate and source) Current (I) is therefore a function of the control signal No current from gate allowed (ideal) Source Control (Gate) Drain (lots of Electrons) V > 0 I

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Voltage on gate is such that electrons can flow from source to drain. This is a
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## This note was uploaded on 03/22/2008 for the course EE 302 taught by Professor Mccann during the Fall '06 term at University of Texas at Austin.

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EE 302 - Lecture Slides - Unit_2[1].3___Circuits_and_Circuit_Elements

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