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10 Cards in this Set
- Front
- Back
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How are amplifiers classified?
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By function and frequency response.
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What are the frequency response ranges of:
-audio amplifiers -rf amplifiers -video amplifiers |
-15Hz - 20kHz
-10kHz - 100,000MHz -10Hz - 6MHz |
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How is the class of operation of an operation determined?
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By the percent of time that current flows through the transistor in relation to the input signal
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What class of operation has current flow for 100% of the input signal, is least efficient, and has the best fidelity?
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Class A
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What transistor configuration has low input and high output impedance?
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Common-base
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What type of feedback is provided when the feedback signal is in phase with the input signal?
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Positive (regenerative) feeback, which increases the gain of an amplifier.
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What classes can push-pull amplifiers be operated as?
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A, AB, or B.
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What are used in video amplifiers to overcome high-frequency limitations caused by capacitance of the circuit?
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Peaking coils
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How is low-frequency compensation accomplished in a video amplifier?
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By use of a parallel RC circuit in series with the load resistor.
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Neutralization in an RF amplifier provides feedback to overcome the effects of what?
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The effects caused by the base-to-collector interelectrode capacitance.
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