nwcros.blogg.se - july 2023

It is nonetheless important to have a good knowledge of those architectures and a good understanding of their mathematical descriptions because these models are the best tools for the engineer that must deal with CDRs. The architectures possible for it are, accordingly, just a few and simple ones (actually just three!). The function of a CDR is a relatively simple one.

5 The Architecture number pair is the same, even if Comparator and/or VCO are non-linear.

4 The right architectural model to study a CDR.

It is useful however, in order to get the best out of them, to have the ability to recognize in each case the fundamental architecture, that is the "Control Systems" block diagram that corresponds to the actual circuit. Many good books are available, with theory and practical examples, like.

the gated oscillator, that resembles the synchronous oscillator, and that is useful when very fast acquisition is needed and other performances can be traded off in return for it.

the synchronous oscillator-much less common, but which may claim, in certain cases, some advantages over PLL.

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

to sample and retime the pulses of the “sliced” signal (data recovery).to extract the clock signal embedded in its transitions (clock recovery) and.

Then a “slicer” circuit reshapes it and retains just the level transitions and the levels that represent the nominal values of the received signal in that interval between two consecutive transitions.

At the receiving end of a data transmission link, the received signal is amplified, filtered and equalized.