At 09:34 AM 3/20/2006, you wrote:
>--- In [email protected], KY1K <[EMAIL PROTECTED]> wrote:
> >
> > Anyway, I think this might be the same virus that went through the
> > list recently, and I'm curious as to whether anyone else on the
> > list has been getting similar virus infected emails?
>
>Art,
>
> nothing received here, but it could well be thanks to my email
>provider (usa.net) which has very effective virus and spam filters. As
>a matter of fact I receive a total of about 150 messages per day, and
>on average only 3 or 4 are spam. I don't see a virus in my inbox since
>more than a couple of years...
Yes, some providers dump the entire message, so the user never even
knows it exists. That might be happening in many cases.
>P.S. Art, have you got my package about SDRadio ?
>
I have the new software installed, but haven't run it yet. My new
computer died and I have to go out an look for a power supply this
morning to get it back up and running.
Lately I've been spice modeling QSD circuits, studying the impact of
an analog switch that has a slow turn off time on a QSD circuit.
The results are preliminary, but my simulations show that analog
switches do not have to conduct for 25 percent of the time, a much
shorter than 25 percent conduction time is almost as good.
Also, it appears that conduction time greater than 25 percent (which
is the norm for the FST cmos switches we currently use) is
devastating to the output! It is possible that a great deal of
additional performance and higher frequency operation of the QSD is
possible with existing technology if the analog switches were
controlled with a quartz based multivibrator (to insure the switch
conduction is less than 25 percent, not more).
More info later, I'm still running simulations.
Regards,
Art
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.1.375 / Virus Database: 268.2.5/284 - Release Date: 3/17/2006
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