general questions regarding electric design

[Stijn Goris]

hi all,

I m designing a (virtual) product for my university. I don' have a lot of
electronic knowledge.
here are some questions:
- I want to split an incomming electric wire (inside a product eg
microwave). Go from 2 electric wires to 4. Does someone know what I have to
use for this?
- I use some chips on my PCB (CPU, flash memory component, RTC). Does a chip
always needs its own klockpulsgenerator or can I use one on the PCB and
connect all the componets to it. Someone knows a website where I can find
info regarding klokpuls generators?
- I m looking for a powerfeed. Has to convert 110 or 220-230 AC to -> 3.3 DC
.. Someone knows where I ca nfind such a device.

I hope my questions are clear enough.

Thanks in advance

kind regard
Stijn

 

[Amnon Pomerants]

Hi
When you come to distribute clocks over your PCB I recommend two major
points:
1. Use point to point only, and not daisy chain
2. Separate the clock sources for different functionalities.
Meaning don't use same oscilator to drive both the CPU block and for example
your Telecom block, even if both need same frequency.

Point to point will be achieved by connecting a clocks distributor chip to
your clock source.
Use for that a special chip and not a regular buffer.
Look at IDT/ PRECOM/ CYPRESS/ TI for such chips


For the AC--> DC converter , many vendors provide it,
a small search in Google will show you.
I myself have used HiTron, ASTEC, LUCENT

Amnon
"Stijn Goris" <mepisto@hotmail.com> wrote in message
news:yOTac.57411$6w.3725352@phobos.telenet-ops.be...

hi all,

I m designing a (virtual) product for my university. I don' have a lot of
electronic knowledge.
here are some questions:
- I want to split an incomming electric wire (inside a product eg
microwave). Go from 2 electric wires to 4. Does someone know what I have
to
use for this?
- I use some chips on my PCB (CPU, flash memory component, RTC). Does a
chip
always needs its own klockpulsgenerator or can I use one on the PCB and
connect all the componets to it. Someone knows a website where I can find
info regarding klokpuls generators?
- I m looking for a powerfeed. Has to convert 110 or 220-230 AC to -> 3.3
DC
. Someone knows where I ca nfind such a device.

I hope my questions are clear enough.

Thanks in advance

kind regard
Stijn