ECELab.com Analog Electronics Auto-Reviewer
1) An emitter follower is often used for what?a. impedance matching b. voltage amplification c. current amplification d. power amplification 2) Which of the following characteristics is not usually associated with an op amp?a. high input impedance b. low output impedance c. high gain d. low power 3) How many degrees is the phase difference between the input and output of a CE amplifier?a. 0 b. 90 c. 180 d. 270 4) The CMRR of an ideal differential amplifier is what?a. 0 b. 1 c. infinite d. none of the above 5) If no distortion must occur during general amplification, what class of operation must be used?a. A b. B c. AB d. C 6) An oscillating circuit with unity gain has which of the following around its feedback loop?a. no feedback b. integrator c. zero phase shift d. changing phase shift 7) Practically all of RF current flow in a conductor occurs where?a. on the conductor surface b. along the conductor's core c. through the entire area of the conductor d. none of the above 8) An op-amp comparator circuit uses which of the following?a. positive feedback b. negative feedback c. active feedback d. no feedback 9) Once triggered, an SCR will remain 'on' as long as which of the following is true?a. the current through it exceeds a certain level b. the voltage across it exceeds a certain level c. the trigger voltage is not removed d. its operating frequency exceeds a certain level 10) Which of the following describes the behavior of the current across the capacitor of an integrator whose input voltage is constant?a. constant b. linear c. exponential d. pulsating
