|Amplifier Teaching Aid (DED Philippinen, 86 p.)|
|Lesson 8 - Small Signal Amplifier II|
No. 1 a) The generator voltage doubles. What is the input impedance?
b) The generator resistance RG doubles. What is the input impedance?
No. 2 You like to connect a microphone (R = 100KW) to an amplifier. What should be the input impedance of the amplifier to get a voltage optimum?
Microphone output voltage Vout = 10 mV
No. 3 The output impedance of your amplifier is 6W. What kind of loudspeaker (4W or 8W) do you choose to get the best power transfer?