# Problem I For the amplifier shown in Figure I, find the power delivered by the amplifier to the load

Problem I For the amplifier shown in Figure I, find the power delivered by the amplifier to the load, and its efficiency The signal voltage is shown on Graphic 1 Data Power supplies 16 V l 650 mA Amplifier RL=10 Ω Av NL-3,000 VV A. Amplifier Rs Ro R in 3 Ry Vin Graphic 1: The signal voltage v(t) Figure 1 IB 、BB Problem 2 The input voltage to certain amplifier is v0.lcos(2,000nt+ 30) and the output voltage is -10sin(2,000mt+15″) Find the complex voltage gain of the amplifier atf-1 kHz and express the magnitude of the gain in decibels Problem 3 An amplifier has a voltage gain of 30 dB and current gain of 70 dB. What is the power gain in decibels? If the input resistance is 100 k£2, what is the load resistance? Problem 4 An amplifier with a voltage gain of 40 dB, an input resistance of 20 k£2, and an output resistance of 75 52 is used to drive a 50 Ω load. What is the value of the open circuit voltage gain? Find the value ofthe power gain in dB. Problem Anamplifier has a short circuit current gainor 10 When the amplifier is operated with a 50 Ω load, the current gain is 8. Find the output resistance of the amplifier. Problem 6 The output voltage ofavoltage amplifier is found to decrease by 40% when a load resistance of 2 His connected. What is the value of the amplifier output resistance?

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