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ANSWERS TO QUESTIONS Q1. THROUGH Q33.
A-1. Amplification is the control of an output signal by an input signal so that the output signal has
some (or all) of the characteristics of the input signal. The output signal is generally larger than
the input signal in terms of voltage, current, or power.
A-2. No, the input signal is unchanged, the output signal is controlled by the input signal but does not
effect the actual input signal.
A-3. To amplify the input signal to a usable level.
A-4. By function and frequency response.
A-5. An audio power amplifier.
A-6. An rf voltage amplifier.
A-7. The amount of time (in relation to the input signal) in which current flows in the output circuit.
A-8. A, AB, B, C.
A-9. Class B operation.
A-10. The amplifier operates (and therefore uses power) for less time in class C than in class A.
A-11. Class A operation.
A-12. To transfer energy (a signal) from one stage to another.
A-13. Direct, RC, impedance, and transformer coupling.
A-14. RC coupling.
A-15. Transformer coupling.
A-16. RC coupling.
