Howtosignalprocessing
- How can a PLL be used for clock recovery?
- How clock is generated from PLL?
- What is clock and data recovery circuit?
- Which type of models contains clock recovery circuits?
How can a PLL be used for clock recovery?
The PLL is a feedback circuit which is commonly used for the synchronisation of digital signals. It consists of a phase detector (such as an EXOR gate) and a voltage-controlled oscillator (VCO) which uses a crystal oscillator as a clock source. The frequency of the crystal is twice the frequency of the received signal.
How clock is generated from PLL?
PLL circuits operate by comparing the phase of an external signal to the phase of a clock signal produced by a voltage controlled crystal oscillator (VCXO). The circuit then adjusts the phase of the oscillator's clock signal to match the phase of the reference signal.
What is clock and data recovery circuit?
The re-timing of incoming data signals using the recovered clock is called Data Recovery. Together, this is called Clock Data Recovery, or CDR. In other words, the role of the CDR is to recover timing information from an incoming signal where there is no accompanying clock signal and to re-time the received data.
Which type of models contains clock recovery circuits?
the phase locked loop architecture (PLL) -- the most common method of clock recovery.
