At 05:50 PM 2/3/2003 +1100, you wrote:
>My apologies, I just looked up the graph and you are
>correct; at minute currents the PIC output pins will
>approach 0v and 5v. Since I always drive outputs at
>least a few mA I was used to the sat voltage gap.

No problem. It's a common characteristic of all CMOS outputs. The nice
thing is that you can get a fairly precise DC voltage with just a passive
filter on a PIC's PWM output pin. Even better if you buffer it with a
cheap CMOS inverter running off a separate reference supply.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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