Figure 4 The circuit is a modulator for an audio signal.
-Refer to Figure 4. The input at Vin1 is the _ and the input to the input at Vin2 is the .
A)audio signal, high- frequency oscillator
B)high- frequency oscillator, audio signal
C)either A or B will work
D)none of the above

Question

Figure 4 The circuit is a modulator for an audio signal.
-Refer to Figure 4. The input at Vin1 is the _ and the input to the input at Vin2 is the .
A)audio signal, high- frequency oscillator 
B)high- frequency oscillator, audio signal 
C)either A or B will work 
D)none of the above

Quizplus · Accepted Answer

In a typical configuration for a modulator or mixer circuit, the high-frequency oscillator signal is applied to one input (Vin2) to mix or modulate with the audio signal, which is applied to the other input (Vin1). This setup allows the audio signal to be modulated onto a carrier wave generated by the oscillator for transmission or processing.

Figure 4 the Circuit Is a Modulator for an Audio