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Comprehensive Study Guide for Exam 2: Circuit Analysis and Operational Amplifiers

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This study guide provides essential information and techniques for successfully tackling Exam 2 on circuit analysis. Key topics include the superposition theorem, dependent sources (VCVS, VCCS, CCCS, CCVS), and methods for calculating voltages and currents in circuits. It discusses Thevenin and Norton equivalent circuits, operational amplifiers, and their ideal characteristics. Use the guide to practice solving for currents, voltages, and understanding circuit components. Master these concepts to excel in your closed-book exam.

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Comprehensive Study Guide for Exam 2: Circuit Analysis and Operational Amplifiers

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  1. Study Guide Exam 2

  2. Exam 2 • Closed book/Closed notes • Bring a calculator

  3. Superposition • Use whatever analysis technique you are most comfortable with. • Draw the circuits with the single source on/other sources off • Calculate the voltages and currents • Sum results to obtain the voltage and current for the original circuit • Assumption is that the circuit components are linear • Power dissipation/generation can not be added using superposition

  4. Dependent Sources • Identify type of dependent source • VCVS, VCCS, CCCS, CCVS • Know the PSpice symbols and how to incorporate them correctly in a circuit • Solve for currents and voltages in a circuit containing one or more dependent sources.

  5. Thevenin and Norton Equivalent Circuits • You may determine the equivalent circuit by: • Calculating the open circuit voltage, the equivalent resistance, and the short circuit current • Performing multiple source transformations • Maximum power transfer to the load occurs with RTh = Rload

  6. Operational Amplifiers • Use the nearly ideal op amp model • No current enters the input terminals • The output voltage produced in a circuit with a feedback resistor is used to make the two input voltages equal when V- < Vo <V+ • If the closed loop gain times the input voltage(s) is greater than V+, then Vo = V+ • If the closed loop gain times the input voltage(s) is more negative than V-, then Vo = V- • If there is no feedback resistor, then Vo is equal to • The open loop gain times the voltage difference between the two input terminals in the linear region (very small input voltages). • V+ when the open loop gain times the voltage difference is greater than V+. • V- when the open loop gain times the voltage difference is more negative than V-.

  7. Operational Amplifiers • Cascaded Op Amps • The total gain f the circuit is the multiplication of the gains of each of the op amp circuits that have be ganged together

  8. Format of Exam • Short answer questionsthat are similar in format to the Electronic Response questions. • Use superposition to find a current/voltage in a circuit. • Solve for currents and voltages in a circuit containing a dependent source. • Transform a network of resistors and sources to its Thevenin and Norton equivalents • Solve for the closed loop gain of a circuits with one or more op amps in it.

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