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Hi
I am working on point to point communication system over dedicated coaxial cable.
Required Data rate = 100kbps
cable length = 5km
I am looking for suggestion/design ideas
In one of my previous projects I used wire line modem (CMX866) successfully over similar distance but baud rate was...
Thanks for comments,
Either I will go to ONSemiconductor route or use toroidal transformer after looking in it other implication, i.e. size, time, risk etc.
Will update late
Regards,
M Mujahid
A Step down transformer is my last option, as operating frequency could be 400Hz.
I probably stick with flyback topology, output power requirement is well under 100W.
any suggestion on controller and MOSFET?
Thanks David for reply
I have a reasonable experience of product designing, especially products for high temperature, intrinsic safety, high speed etc but no high voltage design. high voltage switching power supply is just a small part of my current project.
I have used quite a few DC-DC...
Hi
I have to design a power supply as a part of a bigger system but I have no experience of high voltage power supply design.
I am looking for a reference design for high voltage low/medium power, isolated power supply.
Requirement specs are
VIN Range = 150V to 650V, 50/60Hz, 400Hz is an...
Hi
I have just started working on a power line modem design using BELL 202 modulation (FSK 1200/2200 Hz marks space signal).
There are quite a few design examples available from different chip manufacturers, e.g. TI, ON Semi etc. but all of these use CENELEC bands (starting from 9kHz...
i dont want to over stretch it but there could be an endian issue as well. for example data received over the ethernet and transmitted to uart or spi etc
alexan_e you are right here but what if one union member is int and other is float. so i dont know if it is a good programming practice to split or combine int and char. i would rather use bit manipulation to split or merge bits n bytes
Hi
You probably already know that in union only one member exist at a time (sort of) while you are storing values in one type of data (byte) and trying to read other which is wrong
To get an idea how compiler is handling it look at the generated assembly code
take care
Just to summaries what is been suggested so far by gurus (especially FvM)
use cmx 868 interface as it is i.e. 600 complex impedance termination or cmx side. Refer datasheet figure 4a (r13 is setting source impedance)
use standard 600:600 voice/data transformer with high inductance to minimize...
I have wound transformers with 3.5 turn ratio with available core (toroidal electrical steel core with 100 turns on primary and 29 turns on secondary with 55mH and 4.6mH inductances and have started playing with it.
meanwhile, if someone can explain that if signal frequency results in a wave...
Thanks for reply
I agree with FvM, high winding resistance can not be ignored. (simulation verify that as well)
what i have understood by now is that i need transformer with low winding resistance.
one point if some one can explain, i have noticed that almost all modem transformers have...
Well i know these two facts
(N1/N2)^2 = R1/R2 shows how impedance is reflected from one side to the other. in my case as ratio is 1:1 so there is no impedance translation i.e. will remain same.
Now the second tip, "transformer can not use in higher frequencies". I already mentioned that it is...
Hi
my simple yet confusing question (at least to me) is, can audio transformer with 600 ohm primary and 600 ohm secondary winding be used in 50ohm primary 50ohm secondary circuit ?
little about back ground, I have to tx/rx data over 30 to 50 ohm coaxial cable using interface that is actually...
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