Internal Vref resolution

Hi all ye smart guys:

Anyone knows how to increase the resolution of the 4bit internal reference? And debounce the internal comparator?

on wich device ??? Debounce internal comparator ??? why??? what type of signal do you want to measure ???

Hi Steve:

On any of the following chips 10F204,12F629 or 16F628... I am trying to sample a slowly varying signal on CIN- and hold the values (36 in all per sampling cycle) in Data memory - except of course not in 10F204.

Since the dv/dt is quite small I felt I needed to "debounce" the threshold to avoid jitter at the trip point (cmcon.6 to be repeatable and stabe during read and write to data memory).
I am working with battery (Li-ion button) and am turning the vref (vrcon) and comaprator(cmcon) ON only with low PRF. So I may have settling time issues also... Sampling cycle is 1sec and PRF is nearly once / hr.

Warrier

http://ww1.microchip.com/downloads/e...Doc/41215a.pdf

PICmicro Compartor Tips n Tricks. Very handy.

Bruce:

Thanks for the reference..It is funny I had this pdf file for sometime now but only after you pointed out did I look at the Delta-Sigma converter example again. This is giving me ideas...... I will try the trick slowly germinating in my upper floor (it is a dull one!) and if I get it right I'll let you know.

Thanks again

Warrier