Timing recovery lock in receiver

1. Which type of models contains clock recovery circuits?
2. What is the purpose of a clock recovery circuit?
3. What is meant by timing recovery?
4. How a clock is recovered from data?

Which type of models contains clock recovery circuits?

the phase locked loop architecture (PLL) -- the most common method of clock recovery.

What is the purpose of a clock recovery circuit?

A clock recovery circuit supplies timing to a phase locked loop (PLL), which in turn controls a clock for the recovered upstream information, as we describe shortly.

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.

How a clock is recovered from data?

The receiver generates a clock from an approximate frequency reference, and then phase-aligns the clock to the transitions in the data stream with a phase-locked loop (PLL). This is one method of performing a process commonly known as clock and data recovery (CDR).