ICD QUIZ

key application of PWM signals is: 

• Phase detection

• Motor speed control

• Voltage regulation in linear mode

• Frequency synchronization

 A boost converter is a switching regulator that:

• Steps down the input voltage

• Steps up the input voltage

• Provides constant current

• Inverts the input voltage

A phase detector in a PLL compares: A. Amplitude of two signals 

• Amplitude of two signals

• Phase of VCO output and input reference

• Frequency and amplitude simultaneously

• Bias voltage and loop capacitor

In a 555 timer PWM generator configuration, the duty cycle can be varied by:

• Changing the capacitor value only

• Applying a DC control voltage to Pin 5

• Varying the supply voltage

• Changing the feedback path

The output waveform from IC 566 VCO is: 

• Only sine wave

• Triangular and square waves

• Ramp wave only

• PWM waveforms

The primary function of a low-pass filter in PWM applications is to:

• Allow high-frequency signals to pass

• Amplify the PWM signal

• Block low-frequency signals

• Reduce ripple in the output signal

In a buck converter, the output voltage is:

• Inverted compared to the input voltage

• Lower than the input voltage

• Equal to the input voltage

• Higher than the input voltage

The main advantage of using a digital potentiometer in PWM circuits is:

• Improved accuracy and control

• Lower cost compared to analog potentiometers

• Increased power consumption

• Reduced circuit complexity

In an astable mode, the frequency of oscillation of a 555 timer depends on:

• One resistor only

• Two resistors and a capacitor

• Two capacitors and one resistor

• Only a capacitor

In a linear voltage regulator, the output voltage is:

• Inverted compared to the input voltage

• Lower than the input voltage

• Equal to the input voltage

• Higher than the input voltage