On Saturday, July 15, 2017 at 12:08:10 PM UTC-7, Jim Thompson wrote:> On Sat, 15 Jul 2017 20:02:11 +0100, Piglet <erichpwagner@hotmail.com> > wrote: > > >On 15/07/2017 19:31, Jim Thompson wrote: > >> Good Find, CD4007 Spice Model> I'm studying the pin out to see if it's a viable device to use for a > translator for conventional logic levels up to 15V swings.The protection diodes are wired so that those swings wouldn't be compatible with low PS voltages. The 4049 and 4050 would be a more usual solution (no positive-rail clamp on inputs).
Good Find, CD4007 Spice Model Library....
Started by ●July 15, 2017
Reply by ●July 15, 20172017-07-15
Reply by ●July 15, 20172017-07-15
On Sat, 15 Jul 2017 15:43:22 -0700 (PDT), tabbypurr@gmail.com wrote:>On Saturday, 15 July 2017 22:52:11 UTC+1, Jim Thompson wrote: > >> Maybe later today. I'm still in the throes of the side-effects that >> occur _after_ the chemo is done, like itchy hives and diarrhea :-( > >Fun :( FWIW it's spelt dire rear. > > >NT{>:-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box...producing elegant & economic solutions.
Reply by ●July 16, 20172017-07-16
On 15/07/2017 20:08, Jim Thompson wrote:> > I'm studying the pin out to see if it's a viable device to use for a > translator for conventional logic levels up to 15V swings. > > Watch this space ;-) > > ...Jim Thompson >I did a doubling level shifter (5V in to 10V out) way back, but it used a flying capacitor. Being a monolithic designer I guess you'll find ways to do it all silicon :) piglet --- This email has been checked for viruses by AVG. http://www.avg.com
Reply by ●July 16, 20172017-07-16
On Sat, 15 Jul 2017 15:58:37 -0700, Jim Thompson wrote: Sorry if this has already been covered, Jim, but you used to be a confirmed pspice user, and exclusively so, IIRC. Then you dabbled around with ltspice and again, IIRC, quite liked it (with certain reservations). Which of these two are you mainly using these days and are there any big differences in the way each handles imported 'foreign' models?
Reply by ●July 16, 20172017-07-16
On 15/07/2017 23:55, whit3rd wrote:> The protection diodes are wired so that those swings wouldn't > be compatible with low PS voltages. The 4049 and 4050 > would be a more usual solution (no positive-rail clamp on inputs). >In my 4007 voltage doubling level shifter the chip's Vdd rail was not connected to any system rails but self generated higher voltage. piglet
Reply by ●July 16, 20172017-07-16
On Sun, 16 Jul 2017 10:24:59 -0000 (UTC), Cursitor Doom <curd@notformail.com> wrote:>On Sat, 15 Jul 2017 15:58:37 -0700, Jim Thompson wrote: > >Sorry if this has already been covered, Jim, but you used to be a >confirmed pspice user, and exclusively so, IIRC. Then you dabbled around >with ltspice and again, IIRC, quite liked it (with certain reservations). >Which of these two are you mainly using these days and are there any big >differences in the way each handles imported 'foreign' models?I'm still a died-in-the-wool PSpice user. I've dabbled with LTspice only because some of my clients wanted to "play along" during their chip design. Those who simply simulated my .CIR file got excellent correlation. Those that chose to "draw" their own schematic got overly optimistic results. I mused for sometime over how Mike Engelhardt bragged about his speed advantage over PSpice and every other simulator. I went to one of his seminars and he touted over and over that his technique of a special "compiling" of the netlist gave him the advantage. Then it dawned. His "compiling" is going in and replacing every recognizable "standard" part in the netlist with idealized equivalents. Thus the speed "improvement". You can see his speed advantage fall apart if you feed LTspice with only components not native to LTspice. The absence of the Berkeley-Spice-standard .OUT file in LTspice confirms my suspicions... that would list the actual circuit simulated along with all the model data, operating points, etc, the whole shebang. As for model handling... any Berkeley-Spice-standard model should work in LTspice (if not encrypted). (The only way to avoid LTspice "compiling" is to run from another schematic-capture-generated .CIR/.NET. If you run from a .ASC you get the "treatment".) ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box...producing elegant & economic solutions.
Reply by ●July 16, 20172017-07-16
On Sat, 15 Jul 2017 12:08:00 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Sat, 15 Jul 2017 20:02:11 +0100, Piglet <erichpwagner@hotmail.com> >wrote: > >>On 15/07/2017 19:31, Jim Thompson wrote: >>> Good Find, CD4007 Spice Model Library, at Rochester Institute of >>> Technology, actual measurements by Professor Lynn Fuller... >>> >>> <https://people.rit.edu/lffeee/CD4007_SPICE_MODEL.pdf> >>> >>> >>> ...Jim Thompson >>> >> >>Thanks Jim, very versatile chip that has saved my bacon more than once. >> >>piglet >> > >I'm studying the pin out to see if it's a viable device to use for a >translator for conventional logic levels up to 15V swings. > >Watch this space ;-) > > ...Jim ThompsonSee "CD4007_Logic_Level_Shifter.zip" on the S.E.D/Schematics Page of my website. Had the original CD4007 designer been more free and not tied gates together, it could be done without the resistors. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box...producing elegant & economic solutions.
Reply by ●July 16, 20172017-07-16
On Sun, 16 Jul 2017 09:26:30 -0700, Jim Thompson wrote:> Then it dawned. His "compiling" is going in and replacing every > recognizable "standard" part in the netlist with idealized equivalents. > Thus the speed "improvement".Oh boy. Well, I guess Mike in his own defence would simply say he'd refund you every single cent you paid for it. ;-) I hope Mike's not reading this, btw, as from the exchanges I've had with him from time to time in the past, he doesn't like this kind of thing being openly discussed in a public forum (not surprisingly).
Reply by ●July 16, 20172017-07-16
On Sun, 16 Jul 2017 20:09:11 -0000 (UTC), Cursitor Doom <curd@notformail.com> wrote:>On Sun, 16 Jul 2017 09:26:30 -0700, Jim Thompson wrote: > >> Then it dawned. His "compiling" is going in and replacing every >> recognizable "standard" part in the netlist with idealized equivalents. >> Thus the speed "improvement". > >Oh boy. Well, I guess Mike in his own defence would simply say he'd >refund you every single cent you paid for it. ;-) >I hope Mike's not reading this, btw, as from the exchanges I've had with >him from time to time in the past, he doesn't like this kind of thing >being openly discussed in a public forum (not surprisingly).Having met him face-to-face over lunch at one of his seminars a few years back, I'd rank Mike Engelhardt as a first class narcissistic pompous ass... and I'm being kind >:-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box...producing elegant & economic solutions.
Reply by ●July 16, 20172017-07-16
On Sat, 15 Jul 2017 15:55:25 -0700 (PDT), whit3rd <whit3rd@gmail.com> wrote:>On Saturday, July 15, 2017 at 12:08:10 PM UTC-7, Jim Thompson wrote: >> On Sat, 15 Jul 2017 20:02:11 +0100, Piglet <erichpwagner@hotmail.com> >> wrote: >> >> >On 15/07/2017 19:31, Jim Thompson wrote: >> >> Good Find, CD4007 Spice Model > >> I'm studying the pin out to see if it's a viable device to use for a >> translator for conventional logic levels up to 15V swings. > >The protection diodes are wired so that those swings wouldn't >be compatible with low PS voltages. The 4049 and 4050 >would be a more usual solution (no positive-rail clamp on inputs).What are you bloviating about? See... Message-ID: <nmfnmctnkb54vmoicfniep2ktpnbk57t9u@4ax.com> ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website. Thinking outside the box...producing elegant & economic solutions.
