In industrial automation, a Phase-Locked Loop (PLL) is primarily used for:

• Data compression

• Signal amplification

• Frequency synthesis and synchronization

• Power amplification

Which of the following is NOT a common industrial application of PLLs?

• Motor speed control

• Wireless communication synchronization

• Light intensity measurement

• Clock generation in microcontrollers

In a PLL, the function of the Phase Detector (PD) is to

• Amplify the output

• Detect amplitude changes

• Compare input and feedback signal phases

• Convert digital signal to analog

The Voltage Controlled Oscillator (VCO) in a PLL is responsible for

• Stabilizing power supply

• Generating a signal with frequency proportional to input voltage

• Converting digital to analog signal

• Filtering noise

Industrial motor drives often use PLLs to

• Increase torque

• Generate power

• Ensure constant speed through frequency control

• Control temperature

In communication systems, PLL is widely used for

• Bandwidth limitation

• Phase noise introduction

• Carrier recovery and clock synchronization
  

• Signal distortion

What happens when a PLL is not properly locked in an industrial system?

• Enhanced signal clarity
  

• Random noise reduction

• Loss of synchronization and system instability

• Improved data transfer rate

In control systems, a PLL helps in:

• Reducing the number of sensors

• Increasing the ADC resolution

• Synchronizing the reference clock with process control loop

• Boosting control voltage

Which component in PLL ensures stability by filtering out high-frequency noise?

• Phase Detector

• VCO

• Loop Filter

• Comparator

PLLs used in robotics help with:

• Torque multiplication

• Position and speed feedback synchronization

• Structural load balancing

• Obstacle detection