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Hi,
I have an requirement of DPLL. The requirement is like this. I have an phase detector in VHDL and the difference output is given to processor to do the rest of things like loop filter and voltage input to VCO( which is voltage controlled oscillator) present in the board.
can any of come...
Hi,
see basically whatever your blind vias will be reflected in your drill files. You may not need to specify. Only thing you will have to make sure that your manufacturer will be able to supprot for such kind of vias.
-Sp_Harikrish
They are basically differs in architecture. Logic cells and their size are vary.
CPLD has very low speed where as the FPGA has MUX and high speed design.
CPLD has ROM based and FPGA has RAM based.
FPGA has more logic cells
Top mount is - top layer
Bottom mount - bottom layer
Silkscreen is - Component outline
Pad is general term and padstack is pad in which all the layer it exist.
Ferrite bead will add inductance. For the potential between them is there is no problem But it act as a filter in the high frequency signal.
Hence it will prevent ripple due to anlog circuit noise.
Re: routing =45'
Hi,
one is to avoid the cornering problem.The other one is the capacitance effect in 90 degree angle pcb trace will have more rather than 45 degree.
split power planes
HI,
If your signal crossing only the split power plane, then there won't be problem. Since you have the gorund above the split plane. That is the signal will take the immmediate return path below which the signal is routed. In your case the immediate ground path is ground...
The ferrite will basically act as a filter. Which is basically eliminate the high frequency noise due analog circuits enters into the digital section.
If you shrot with the normal 0E resistor, you will not have any filtering circuit. The noise due to the analog circuit will get coupled into the...
PCB routing
No problem, But you make sure that the high frquency traces are routed through an guard traces and prefect impedance termination.
You can even achieve in two layer board.
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