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| 1.
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Find the closed-loop gain for a feedback amplifier with an open-loop gain of 200 and a feedback ratio of 0.33? |
| | A) | 199.77 |
| | B) | 66 |
| | C) | 33 |
| | D) | 2.99 |
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| 2.
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Which amplifier coupling method provides dc gain? |
| | A) | direct |
| | B) | transformer |
| | C) | capacitive |
| | D) | All of the above |
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| 3.
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What does the addition of negative feedback do to an amplifier’s bandwidth? |
| | A) | decreases it |
| | B) | has no effect |
| | C) | increases it |
| | D) | any of the above, depending on the configuration |
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| 4.
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A transformer-coupled, common emitter amplifier uses a 10:1 winding ratio. What is the load seen by the collector if the secondary drives 10 ohms? |
| | A) | infinity |
| | B) | 1000 ohms |
| | C) | 100 ohms |
| | D) | 1 ohm |
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| 5.
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A three stage amplifier has individual stage ratio gains of 5, 20, and 4. What is the cascade ratio gain? |
| | A) | 400 |
| | B) | 200 |
| | C) | 29 |
| | D) | 11 |
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| 6.
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The large signal limits of an amplifier are shown graphically with the: |
| | A) | ac load line |
| | B) | temporary ac load line |
| | C) | dc load line |
| | D) | none of the above |
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| 7.
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A three stage amplifier has individual stage gains of 5 dB, 20 dB and 4 dB. What is the cascade gain? |
| | A) | 400 dB |
| | B) | 200 dB |
| | C) | 29 dB |
| | D) | 11 dB |
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| 8.
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What does the addition of negative feedback do to an amplifier’s distortion? |
| | A) | decreases it |
| | B) | has no effect |
| | C) | increases it |
| | D) | any of the above, depending on the configuration |
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| 9.
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Find the voltage gain for the circuit shown below:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Image093::/sites/dl/free/0073106941/443736/image093.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Image093 (4.0K)</a>]]>Image093 |
| | A) | cannot be determined |
| | B) | 47 dB |
| | C) | 28 dB |
| | D) | 12 dB |
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| 10.
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Tuned transformer-coupling is used in: |
| | A) | dc amplifiers |
| | B) | bandpass amplifiers |
| | C) | both of the above |
| | D) | none of the above |
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| 11.
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Find the input impedance for the amplifier shown below:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Image094::/sites/dl/free/0073106941/443736/image094.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Image094 (4.0K)</a>]]>Image094 |
| | A) | cannot be determined |
| | B) | 4 k W |
| | C) | 2 k W |
| | D) | 1 k W |
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| 12.
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A common source FET amplifier uses a drain resistor of 3.3 k W and the transistor Yfs = 2 mS. The expected voltage gain of this amplifier is: |
| | A) | 103 |
| | B) | 47 |
| | C) | 12 |
| | D) | 6.6 |
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