Clock recovery fpga

1. How does clock recovery work?
2. What is a clock recovery circuit?
3. What is CMT in FPGA?
4. How to generate clock in FPGA?

How does clock recovery work?

How does CDR work? It locks on a frequency that is retrieved from incoming data stream. To do so, it detects the data transitions and locks an VCO (Voltage Controlled Oscillator) to that frequency. This frequency is then used when generating the transmitted data bit stream.

What is 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. From: Modern Cable Television Technology (Second Edition), 2004.

What is CMT in FPGA?

Clock Management Resources of FPGAs

For example, Xilinx uses clock management tile (CMT) or digital clock manager (DCM), Intel uses the well-known term phase-locked loop (PLL), and Microsemi uses clock conditioning circuitry. The CMBs can generate new clock signals by performing clock multiplication and division.

How to generate clock in FPGA?

PLL in FPGA

Instead of getting a dedicated clock for everything, you can simply take a clock that has, for example, a wave frequency of 50 MHz, and then have it pulse every so often per number of cycles to get a customized clock with variable frequencies.