If an operational transconductance amplifier (OTA)is used as a nonlinear mixer and an audio signal is mixedW ith an RF signal, the outputW ill be a(n)________ signal.
A)amplitude modulated (AM)
B)square Wave
C)triangular Wave
D)frequency modulated (FM)

Question

Quizplus · Accepted Answer

When an audio signal is mixed with an RF signal using an OTA as a nonlinear mixer, the output will be an amplitude modulated signal. This is because the OTA's nonlinear behavior results in multiplication of the two input signals, which produces sum and difference frequencies. The sum frequency corresponds to an increase in the amplitude of the original signals, while the difference frequency corresponds to a decrease. This produces an amplitude modulated signal, where the amplitude of the RF carrier is varied by the amplitude of the audio signal.

If an Operational Transconductance Amplifier (OTA)is Used as a Nonlinear