On Tue, 07 Aug 2012 15:42:52 -0400, bitrex
<bitrex@de.lete.earthlink.net> wrote:
>On 8/7/2012 3:27 PM, Jim Thompson wrote:
>> I'm honing my Spice modeling skills and need some suggestions of
>> devices whose manufacturer-provided Spice model doesn't match reality
>> very well, or has serious issues.
>>
>> I'll try my hand at modeling the device and post my results on these
>> newsgroups and on the LTspice list. It would be helpful if, when you
>> make a suggestion, you state where and how it fails to match up with
>> claimed data sheet performance.
>>
>> [No real nasty systems-on-a-chip... I want to save those for paying
>> customers... and, for now, keep it limited to Analog parts :-]
>>
>> ...Jim Thompson
>>
>
>4046? (Does a Spice model even exist?)
Got delayed by paying work ;-)
Could someone 'scope each end of the VCO timing cap (C1, pins 6 & 7)
and tell me what they look like? (The block diagram implies a
physical impossibility, so there's something limiting the pull-down
switches to some voltage. A waveform will expose the "secret" :)
Thanks!
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Reply by Paul Hovnanian P.E.●August 9, 20122012-08-09
Jim Thompson wrote:
> I'm honing my Spice modeling skills and need some suggestions of
> devices whose manufacturer-provided Spice model doesn't match reality
> very well, or has serious issues.
Scary Spice? http://www.google.com/images?q=scary+spice
--
Paul Hovnanian mailto:Paul@Hovnanian.com
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Reply by Jim Thompson●August 9, 20122012-08-09
On Wed, 08 Aug 2012 22:47:55 -0400, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:
>On Tue, 07 Aug 2012 15:42:52 -0400, the renowned bitrex
><bitrex@de.lete.earthlink.net> wrote:
>
>>On 8/7/2012 3:27 PM, Jim Thompson wrote:
>>> I'm honing my Spice modeling skills and need some suggestions of
>>> devices whose manufacturer-provided Spice model doesn't match reality
>>> very well, or has serious issues.
>>>
>>> I'll try my hand at modeling the device and post my results on these
>>> newsgroups and on the LTspice list. It would be helpful if, when you
>>> make a suggestion, you state where and how it fails to match up with
>>> claimed data sheet performance.
>>>
>>> [No real nasty systems-on-a-chip... I want to save those for paying
>>> customers... and, for now, keep it limited to Analog parts :-]
>>>
>>> ...Jim Thompson
>>>
>>
>>4046? (Does a Spice model even exist?)
>
>A "preliminary" model:-
Will run under PSpice, but nothing else. (MNTYMXDLY)
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Reply by Spehro Pefhany●August 8, 20122012-08-08
On Tue, 07 Aug 2012 15:42:52 -0400, the renowned bitrex
<bitrex@de.lete.earthlink.net> wrote:
>On 8/7/2012 3:27 PM, Jim Thompson wrote:
>> I'm honing my Spice modeling skills and need some suggestions of
>> devices whose manufacturer-provided Spice model doesn't match reality
>> very well, or has serious issues.
>>
>> I'll try my hand at modeling the device and post my results on these
>> newsgroups and on the LTspice list. It would be helpful if, when you
>> make a suggestion, you state where and how it fails to match up with
>> claimed data sheet performance.
>>
>> [No real nasty systems-on-a-chip... I want to save those for paying
>> customers... and, for now, keep it limited to Analog parts :-]
>>
>> ...Jim Thompson
>>
>
>4046? (Does a Spice model even exist?)
On Wed, 08 Aug 2012 19:11:03 -0500, John Fields
<jfields@austininstruments.com> wrote:
>On Wed, 08 Aug 2012 15:58:06 -0700, Jim Thompson
><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:
>
>>On Tue, 07 Aug 2012 15:42:52 -0400, bitrex
>><bitrex@de.lete.earthlink.net> wrote:
>>
>>>On 8/7/2012 3:27 PM, Jim Thompson wrote:
>>>> I'm honing my Spice modeling skills and need some suggestions of
>>>> devices whose manufacturer-provided Spice model doesn't match reality
>>>> very well, or has serious issues.
>>>>
>>>> I'll try my hand at modeling the device and post my results on these
>>>> newsgroups and on the LTspice list. It would be helpful if, when you
>>>> make a suggestion, you state where and how it fails to match up with
>>>> claimed data sheet performance.
>>>>
>>>> [No real nasty systems-on-a-chip... I want to save those for paying
>>>> customers... and, for now, keep it limited to Analog parts :-]
>>>>
>>>> ...Jim Thompson
>>>>
>>>
>>>4046? (Does a Spice model even exist?)
>>
>>Not having a 4046 at hand, and the data sheet is sorely lacking, could
>>someone measure the voltages at pins 11 and 12, versus VCC?
>>
>>Thanks!
>>
>> ...Jim Thompson
>---
>I've got some 4046's in stock, and I'll give you one so you can do the
>legwork yourself and not have to rely on anyone else's possibly faulty
>data messing up your results.
>
>
Thanks! That will allow me to also observe its droop versus set
current.
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Reply by John Fields●August 8, 20122012-08-08
On Wed, 08 Aug 2012 15:58:06 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:
>On Tue, 07 Aug 2012 15:42:52 -0400, bitrex
><bitrex@de.lete.earthlink.net> wrote:
>
>>On 8/7/2012 3:27 PM, Jim Thompson wrote:
>>> I'm honing my Spice modeling skills and need some suggestions of
>>> devices whose manufacturer-provided Spice model doesn't match reality
>>> very well, or has serious issues.
>>>
>>> I'll try my hand at modeling the device and post my results on these
>>> newsgroups and on the LTspice list. It would be helpful if, when you
>>> make a suggestion, you state where and how it fails to match up with
>>> claimed data sheet performance.
>>>
>>> [No real nasty systems-on-a-chip... I want to save those for paying
>>> customers... and, for now, keep it limited to Analog parts :-]
>>>
>>> ...Jim Thompson
>>>
>>
>>4046? (Does a Spice model even exist?)
>
>Not having a 4046 at hand, and the data sheet is sorely lacking, could
>someone measure the voltages at pins 11 and 12, versus VCC?
>
>Thanks!
>
> ...Jim Thompson
---
I've got some 4046's in stock, and I'll give you one so you can do the
legwork yourself and not have to rely on anyone else's possibly faulty
data messing up your results.
--
JF
Reply by Jim Thompson●August 8, 20122012-08-08
On Tue, 07 Aug 2012 15:42:52 -0400, bitrex
<bitrex@de.lete.earthlink.net> wrote:
>On 8/7/2012 3:27 PM, Jim Thompson wrote:
>> I'm honing my Spice modeling skills and need some suggestions of
>> devices whose manufacturer-provided Spice model doesn't match reality
>> very well, or has serious issues.
>>
>> I'll try my hand at modeling the device and post my results on these
>> newsgroups and on the LTspice list. It would be helpful if, when you
>> make a suggestion, you state where and how it fails to match up with
>> claimed data sheet performance.
>>
>> [No real nasty systems-on-a-chip... I want to save those for paying
>> customers... and, for now, keep it limited to Analog parts :-]
>>
>> ...Jim Thompson
>>
>
>4046? (Does a Spice model even exist?)
Not having a 4046 at hand, and the data sheet is sorely lacking, could
someone measure the voltages at pins 11 and 12, versus VCC?
Thanks!
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Reply by Fred Abse●August 8, 20122012-08-08
On Wed, 08 Aug 2012 21:16:50 +1000, David Eather wrote:
> On Wed, 08 Aug 2012 05:27:45 +1000, Jim Thompson
> <To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:
>
>> I'm honing my Spice modeling skills and need some suggestions of devices
>> whose manufacturer-provided Spice model doesn't match reality very well,
>> or has serious issues.
>>
>> I'll try my hand at modeling the device and post my results on these
>> newsgroups and on the LTspice list. It would be helpful if, when you
>> make a suggestion, you state where and how it fails to match up with
>> claimed data sheet performance.
>>
>> [No real nasty systems-on-a-chip... I want to save those for paying
>> customers... and, for now, keep it limited to Analog parts :-]
>>
>> ...Jim Thompson
>
> Some basic 741's really suck - they can deliver amps with no power supply
> draw (I didn't bother to check the rest)
741s suck, period.
--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)
Reply by Fred Abse●August 8, 20122012-08-08
On Wed, 08 Aug 2012 11:24:52 +0000, Nico Coesel wrote:
> Transistors with avalanche characteristics.
I got there ahead of you ;-)
--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)
Reply by Nico Coesel●August 8, 20122012-08-08
Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com>
wrote:
>I'm honing my Spice modeling skills and need some suggestions of
>devices whose manufacturer-provided Spice model doesn't match reality
>very well, or has serious issues.
>
>I'll try my hand at modeling the device and post my results on these
>newsgroups and on the LTspice list. It would be helpful if, when you
>make a suggestion, you state where and how it fails to match up with
>claimed data sheet performance.
>
>[No real nasty systems-on-a-chip... I want to save those for paying
>customers... and, for now, keep it limited to Analog parts :-]
Transistors with avalanche characteristics.
--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
nico@nctdevpuntnl (punt=.)
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