[hpsdr] Janus ESD terminations

[Philip Covington]

Don't worry about doing this for OZY since the 100k resistors are already there.

73 de Phil N8VB


On 6/5/06, Lyle Johnson <kk7p at wavecable.com> wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> > I plan to get a supply of small chip resistors and lay them in across
> > the connector pins A row to B row  then C row to B row.  The layout is
> > tight and the connector field looks like the best spot. It is a real
> > drag to blow out an FPGA with ESD...
>
> Good idea.
>
> 52 pieces of 100K resistor in 0603 (or perhaps 0805) SMD packages would
> probably work well for this.
>
> C2...C25, C27, C29, C31 to the corresponding B pins.
> A2..A19, A22..A25, A27, A29, A31 to the corresponding B pins.
>
> Skip A20 and A21 because they already have resistors to +3.3V (part iof
> I2C).
>
> 73,
>
> Lyle KK7P
>
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