Unit4Review_Kalani_Hoopii.docx - Section 162 2 One...

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Section 16–2 2. One condition for oscillation is (a) a phase shift around the feedback loop of 180° (b) a gain around the feedback loop of one-third (c) a phase shift around the feedback loop of 0° ; phase shift through the lead-lag circuit is 0° pg 812 (d) a gain around the feedback loop of less than 1 4. In a certain oscillator, A v = 50. The attenuation of the feedback circuit must be (a) 1 (b) 0.01 (c) 10 (d) 0.02 Section 16–3 6. Wien-bridge oscillators are based on (a) positive feedback; pg 812 (b) negative feedback (c) the piezoelectric effect (d) high gain 8. The Wien-bridge oscillator’s positive feedback circuit is (a) an RL circuit (b) an LC circuit (c) a voltage divider (d) a lead-lag circuit; pg 812 Section 16–4 10. Colpitts, Clapp, and Hartley are names that refer to (a) types of RC oscillators (b) inventors of the transistor (c) types of LC oscillators; pg 817 (d) types of filters
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Section 16–5 12. An oscillator whose frequency is changed by a variable dc voltage is known as (a) a crystal oscillator (b) a VCO; The voltage-controlled oscillator is a relaxation oscillator whose
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