[sdiy] 3 bit A to D with hysteresis?

[Sowa Roman]

Prepare for wordmatic(tm) :)

So you have 3-bit output. Connect it to 3-bit DAC, and DAC to
(+) input of comparator. (-) input of this comparator goes to input buffer
of the ADC (assuming you have a buffer there). Place resistor
between the buffer and ADC input, say, 100ohm. Another resistor
(10k?) goes from comparator output also to ADC input.
Whenever you reach ADC threshold, you'll get additional voltage
from comparator giving the hysteresis to keep ADC from going
back so soon.

hope this helps and my wordmatic was readable :)

Roman

__-----Original Message-----
__From: pfperry at melbpc.org.au [mailto:pfperry at melbpc.org.au]
__Sent: Saturday, May 25, 2002 9:49 AM
__To: synth-diy at dropmix.xs4all.nl
__Subject: [sdiy] 3 bit A to D with hysteresis?
__
__
__Can anyone point me to a 3 bit A to D with hysteresis?
__(yeah I now I can do it with a PIC! but, there must be an 
__elegant alternative.. eventually I want to be able to select 
__between 8 inputs by a control voltage, but without problems 
__of 'jumping around' on the edges of the changeovers.)
__
__paul perry Melbourne Australia
__-- 
__Message sent by Webmail from melbpc.org.au
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