Yair,
I think you’re wrong on both your
claims. My proposed circuit will NOT cause accuracy problems to the
detection algorithm because the off-resistance of the switch is very
high. ROFF>>ZAC2.
For the same reason it will not mess up
the ac-disconnect funtion. I address these in my presentation.
Steve
From: owner-stds-802-3-poep@xxxxxxxx
[mailto:owner-stds-802-3-poep@xxxxxxxx] On
Behalf Of Yair Darshan
Sent: Sunday, June 04, 2006 4:35
AM
To:
STDS-802-3-POEP@xxxxxxxxxxxxxxxxx
Subject: Re: [8023-POEP] Solved
another problem with DS
Hi all,
The resistor idea with the switch will
cause accuracy problems to the detection algorithm.
In addition it will mess the whole
ac-disconnect function which is very sensitive to anything that is not high
impedance…
Yair
From: owner-stds-802-3-poep@xxxxxxxx
[mailto:owner-stds-802-3-poep@xxxxxxxx] On
Behalf Of Derek
Koonce
Sent: Wednesday, May 31, 2006 9:45
PM
To:
STDS-802-3-POEP@xxxxxxxxxxxxxxxxx
Subject: Re: [8023-POEP] Solved
another problem with DS
Steve,
1. I like your slide 5. With the switch in the midspan, the midspan can
actually enable the endspan if the midspan has run out of power budget. Can the
resistor be higher such that it interferes with the "signature"
detection phase and thus the endspan would never really win because the
signature is out of spec? The midspan can detect faster and avoid the delay in
order to interfere with the detection for the endspan. Once PD is powered, the
midspan could release the switch and conserve power on the endspan's behalf.
2. Slide 8. I thought the objective 7 was not to draw JUST enough to light an
LED, but to operate at a lower power while providing the indication in some
form.
Derek Koonce
Steve Robbins
wrote:
Guys,
I think I’ve solved another problem
that’s inherent with DS. See the attached pdf. (Only about 10
more tough problems to go!)
I’d sure appreciate some comments.
Steve