The human ear can hear frequencies between 20 to 20,000 Hz. As a biomedical engineer, you have been asked to develop a circuit for use in audio hearing tests. For such a circuit, an op-amp is being utilised whose slew rate has a value of 0.15 V/μs. What is the maximum frequency of a sinusoidal wave with a 10 V peak-to-peak amplitude that can be produced at the output terminal of such an op-amp? For the calculated maximum frequency value, is the op-amp suitable for use in this hearing test circuit?

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Amplitude modulation

A radio signal can carry information in the form of sound or image for broadcasting or communication. For it to be sent to a greater distance, the signal must be changed or modulated in some way. One of the easiest way is to change the amplitude of the signal with variations of the video or the audio signal. This is called Amplitude Modulaton. In this modulation information of message is carried in amplitude of carrier signal.