Re: [CAD_CAM_EDM_DRO] Re: Parallel Port Interface / correction!

In a message dated 04-Nov-01 20:47:35 Central Standard Time,
Gary.Rose@... writes:

> Can you explain a little why the SCHMITT trigger is significant (like
> what is it)?
>
>

Gary: A schmidtt trigger "fires" when the input-voltage reaches a certain
level, generally a little over half the "supply voltage" (which is usually
5.0 VDC in TTL logic). It then CONTINUES to output a full "logic-1" (or
"LO", if inverter, etc.) until that input-voltage drops slightly BELOW that
same mid-point. This way, a "jiggly" input does not cause "spurious"
outputs. I tried a KISS answer. If not adequate, sorry. I are ignernt!


[Non-text portions of this message have been removed]