On Thu, Sep 08, 2005 at 11:52:51AM -0400, Timothy Miller wrote:
>
> (1) We need a test power supply circuit built and tested.
>
> We have a schematic for the power supply circuit designed. We need to
> build one on copper clad or something like that and test. Primarily,
> we need to see how much noise is in the output. If someone could
> build that for us, we can tell you how to measure it, or you can ship
> it to us for testing.
I've got a lot on my plate right now, and no scope at home, but I
could help a little with this one. If you shoot me the schematic PDF, parts
list, and input and output electrical specs, I can do a pretty realistic
calculation of the output ripple and trash. If you're using parts I don't
have data sheets for, I might need to ask for copies of those too, if
they're not easily available from the web. I can also suggest PCB design
instructions to make sure the board as laid out achieves the predicted
ripple level. I've done that several times in the last couple of years.
What's the board layer arrangement, GND and Vcc in the middle, and
two signal layers each top and bottom?
Another thing I could whack out pretty quick is a standard set of
PCB fab drawing notes. I think I remember most of what I wrote at the last
company.
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