EGR 224/Spring 2009/Test 2

This page is the review sheet for Test 2 for ECE 119 for Spring, 2009.

Coverage

While the test is, by nature, cumulative, there will be certain aspects of the Electrical Fundamentals of Mechatronics which form the core of this test. Specifically, topics from lectures 7-16 (in lab 5). More specifically, topics including, but not limited to,

1. Reactive elements (capacitors and inductors)
   1. Know the basic voltage/current relationships
   2. Know the continuity conditions
2. DC steady-state analysis of reactive circuits
   1. Capacitors act like open circuits
   2. Inductors act like short circuits
3. AC steady-state analysis of reactive circuits
   1. Phasor analysis for single-frequency sources
   2. Phasor analysis coupled with superposition for circuits with sources at different frequencies - you can either do each individual component of all the sources independently or group components by frequency.
4. Impedance and transfer functions
5. Filters
   1. Be able to determine filter type by transfer function
   2. 1st order filters
      1. Determine cutoff frequency (half-power or -3dB frequency) and filter type
      2. Be able to determine filter type given a circuit or design a circuit given a filter type. This type of question would be limited to voltage-to-voltage filters
   3. 2nd order filters
      1. Be able to determine filter type given a circuit
      2. For high-pass or low-pass filters, be able to determine cutoff (half-power) frequencies
      3. For band-pass filters, be able to determine bandwidth, quality, damping ratio, cutoff frequencies, logarithmic center frequency, and linear center frequency
      4. For band-reject filters, be able to determine quality, damping ratio, cut-on frequencies, logarithmic center frequency, and linear center frequency
      5. Be able to design a band-pass or band-reject filter given sufficient information (some combination of bandwidth, quality, damping ratio, cutoff/cuton frequencies, logarithmic center frequency, and linear center frequency. You will not be asked to build anything that requires more than three components.
6. Bode plots
   1. Be able to sketch Bode magnitude plot approximation for multiple zero/pole system assuming poles and zeros are at least a decade away from each other (i.e. no tricky cases)
   2. Be able to interpret Bode magnitude plot with respect to bandwidth, quality, damping ratio, cutoff/cut-on frequencies, logarithmic center frequency, and linear center frequency

techniques

1. Frequency and Time Domain Relations
   1. Determine transfer functions between a source and an output
   2. Determine differential equation using time or frequency techniques
2. Operational Amplifiers
   1. Know the requirements for the Ideal Op-Amp Assumptions (feedback between the output and the inverting input), the Ideal Op-Amp assumptions (infinite internal input impedance, zero internal output impedance, and infinite internal voltage gain), and the results of the Ideal Op-Amp Assumptions (no voltage drop across the input terminals and no current into/out of the input terminals).
   2. Know how to analyze and build buffers, noninverting configurations, and inverting configurations.
   3. Know how to analyze non-standard configurations (i.e. every other kind of circuit with an OpAmp, including those with reactive elements).

Relevant Prior Test Questions

• Edited to reflect removal of solutions to differential equations (3/28/2009):

From the Test Bank:

• EE/ECE 61
  • Spring 2001 Test 2 (IV, V)
  • Fall 2001 Test 2 (III, IV)
  • Spring 2001 Test 3 (I, III, IV, V)
  • Fall 2001 Test 3 (I and II)
• ECE 141
  • Spring 2007 Test 1 (V); can use Fourier/Phasor instead of Laplace
  • Spring 2008 Test 1 (IV a); can use Fourier/Phasor instead of Laplace
• EGR 119
  • Spring 2008 Test 1 (I, II, III)
  • Spring 2008 Test 2 (I, II (a-d), III)

Questions

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References