Hi MIKE.

21-Mar-04 21:20:54, MIKE ROSS wrote to Greg Mayman

 MR> But the question was if this was a positive feedback? An analogy
 MR> of this action might be for example an electric arc where a
 MR> certain threshold voltage must be attained before the gas ionizes.
 MR> Then once it conducts the voltage required to maintain the arc is
 MR> quite low. There is no positive feedback to be found in this
 MR> either.

Isn't that effect called "negative resistance"

 MR> The idea of a positive feedback requires energy be added
 MR> to the system.

Energy? added from where? how? what's the system?

 MR> In my opinion we don't find it in the relay action.
 MR> Where is energy added?

I agree I used the wrong term. hysterisis is more technically accurate,
but doesn't fully describe it, because analogue systems can have hysterisis
that doesn't lock the output into one of 2 states

 -=> Bye <=-

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