I built a switch mode power supply for high voltage, with a PIC PWM
controlled MOSFET. When the circuit started the inductor was a "short"
to ground from a +12DC grounded through the MOSFET. This led to faulty
starts as it would pull my power supply down low enough where the PIC
wouldn't start sometimes. I added a pullup resistor to the gate of the
MOSFET. Why would an ANDed oscillator be better than a simple
pull-up/down?

> And way back when, a separate adjustable
> duty cycle oscillator ANDed with the logic signals. That would
> also protect the LEDs if code locked up
>
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist