The frequency of periodic waveform generated by Voltage Controlled Oscillator (VCO) can be only controlled by _____.

The frequency of periodic waveform generated by Voltage Controlled Oscillator (VCO) can be only controlled by _____.

a. Input Voltage
b. Output Voltage
c. Magnitude of Control Voltage
d. All of them

Correct Answer : a. Input Voltage

Explanation :

VCO generates the periodic waveform whose frequency can only be controlled by input voltage whereas the frequency put out by VCO at any instant merely depends on sign & magnitude of control voltage & independent on any kind of input voltage.