Clock recovery in digital communication

In serial communication of digital data, clock recovery is the process of extracting timing information from a serial data stream itself, allowing the timing of the data in the stream to be accurately determined without separate clock information.

1. Why do we need clock recovery?
2. What is meant by timing recovery?
3. What is the application of clock and data recovery CDR circuit?
4. Which type of modern contains clock recovery circuit?

Why do we need clock recovery?

The main goal when transmitting an optical/electrical signal from one point to the other is to conserve the signal integrity to avoid any loss of data. A key feature is the ability to transfer timing information from source point to destination point. This timing feature is called Clock Data Recovery.

What is meant by timing recovery?

The purpose of timing recovery is to recover a clock at the symbol rate or a multiple of the symbol rate from the modulated waveform. This clock is required to convert the continuous- time received signal into a discrete-time sequence of data symbols.

What is the application of clock and data recovery CDR circuit?

The use of clock and data recovery, or CDR, provides improved clock and data synchronization and also reduces timing uncertainty. In addition, CDRs are valuable as a means of jitter mitigation for a variety of applications.

Which type of modern contains clock recovery circuit?

The correct answer is option 1. Key PointsThe synchronous modems are more costly than asynchronous modems because they contain clock recovery circuits. Synchronous modems send the clock signals along with the data.