Q1. An audio-signal source can be represented by a 10-mV (rms) voltage source with 500-2 resistance. The audio signal is to be applied to a 10-2 loudspeaker as shown below. (a) If the signal source is connected directly to the loudspeaker, find the power delivered to the loudspeaker. (b) A voltage amplifier is to be connected between the signal source and the loudspeaker. The input voltage of the amplifier before saturation occurs is 8 mV rms. The maximum loudspeaker current is 100 mA rms. Design the amplifier so that maximum power is delivered to the loudspeaker (i.e. find A,,R,, R, ). Find also this maximum power. (c) Find the rms value of the load voltage for part (b). R=500 N loudspeaker voltage amplifier: R=10 2 R.

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Q1. An audio-signal source can be represented by a 10-mV (rms) voltage source with 500-2 resistance. The audio
signal is to be applied to a 10-2 loudspeaker as shown below.
(a) If the signal source is connected directly to the loudspeaker, find the power delivered to the loudspeaker.
(b) A voltage amplifier is to be connected between the signal source and the loudspeaker. The input voltage of
the amplifier before saturation occurs is 8 mV rms. The maximum loudspeaker current is 100 mA rms. Design
the amplifier so that maximum power is delivered to the loudspeaker (i.e. find A, ,R,, R, ). Find also this
maximum power.
(c) Find the rms value of the load voltage for part (b).
R=500 N
loudspeaker
voltage amplifier:
R=10 2
Transcribed Image Text:Q1. An audio-signal source can be represented by a 10-mV (rms) voltage source with 500-2 resistance. The audio signal is to be applied to a 10-2 loudspeaker as shown below. (a) If the signal source is connected directly to the loudspeaker, find the power delivered to the loudspeaker. (b) A voltage amplifier is to be connected between the signal source and the loudspeaker. The input voltage of the amplifier before saturation occurs is 8 mV rms. The maximum loudspeaker current is 100 mA rms. Design the amplifier so that maximum power is delivered to the loudspeaker (i.e. find A, ,R,, R, ). Find also this maximum power. (c) Find the rms value of the load voltage for part (b). R=500 N loudspeaker voltage amplifier: R=10 2
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