题目内容
Measure the peak-to-peak amplitude of the signal.
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When you talk into the microphone, the signals you get are small. To make them bigger, you need an amplifier. One possible circuit is an operational amplifier circuit.
The minus sign appears because this is an inverting amplifier circuit, that is, the output waveform has the same shape as the input waveform, but is turned upside down, or inverted, compared with the input waveform.
Monitor the input and the output of the system using the oscilloscope. Measure the peak-to-peak amplitude of the final output signal.
Do your observations using the oscilloscope confirm the above theoretical analysis ?
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