On Tue, 15 Oct 2013 18:18:37 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Tue, 15 Oct 2013 18:45:23 -0500, John Fields ><jfields@austininstruments.com> wrote: > >>On Tue, 15 Oct 2013 16:29:32 -0700, John Larkin >><jlarkin@highlandtechnology.com> wrote: >> >> >>>Me too! Plonk me too! >> >>--- >>Why ask someone else to do what you could so easily do yourself. ;) > >SED has become like a leftist organization... the bombastic >egotistical ignorant claim supremacy and chastise those of us who know >how semiconductors function when we point out their errors.Larkin's right. You are a senile old geezer.>I _will_not_stop_ pointing out the ignorant whether they froth (or is >it foam ?:-) at the mouth or not.Hell, you won't even remember in the morning.
Never Buy Maxim (again)
Started by ●October 13, 2013
Reply by ●October 15, 20132013-10-15
Reply by ●October 15, 20132013-10-15
On Tue, 15 Oct 2013 21:48:05 -0400, krw@attt.bizz wrote:>On Tue, 15 Oct 2013 18:18:37 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Tue, 15 Oct 2013 18:45:23 -0500, John Fields >><jfields@austininstruments.com> wrote: >> >>>On Tue, 15 Oct 2013 16:29:32 -0700, John Larkin >>><jlarkin@highlandtechnology.com> wrote: >>> >>> >>>>Me too! Plonk me too! >>> >>>--- >>>Why ask someone else to do what you could so easily do yourself. ;) >> >>SED has become like a leftist organization... the bombastic >>egotistical ignorant claim supremacy and chastise those of us who know >>how semiconductors function when we point out their errors. > >Larkin's right. You are a senile old geezer. > >>I _will_not_stop_ pointing out the ignorant whether they froth (or is >>it foam ?:-) at the mouth or not. > >Hell, you won't even remember in the morning.See what I mean about bombastic egotistical ignorance? All Larkin and krw can manage is name-call. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 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 ●October 15, 20132013-10-15
On Tue, 15 Oct 2013 18:58:12 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Tue, 15 Oct 2013 21:48:05 -0400, krw@attt.bizz wrote: > >>On Tue, 15 Oct 2013 18:18:37 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Tue, 15 Oct 2013 18:45:23 -0500, John Fields >>><jfields@austininstruments.com> wrote: >>> >>>>On Tue, 15 Oct 2013 16:29:32 -0700, John Larkin >>>><jlarkin@highlandtechnology.com> wrote: >>>> >>>> >>>>>Me too! Plonk me too! >>>> >>>>--- >>>>Why ask someone else to do what you could so easily do yourself. ;) >>> >>>SED has become like a leftist organization... the bombastic >>>egotistical ignorant claim supremacy and chastise those of us who know >>>how semiconductors function when we point out their errors. >> >>Larkin's right. You are a senile old geezer. >> >>>I _will_not_stop_ pointing out the ignorant whether they froth (or is >>>it foam ?:-) at the mouth or not. >> >>Hell, you won't even remember in the morning. > >See what I mean about bombastic egotistical ignorance?Egotistical? Not *you*!>All Larkin and krw can manage is name-call.Sometimes the truth hurts. You can plonk me anytime you want. ...that is, if you can remember how.
Reply by ●October 15, 20132013-10-15
On Wednesday, 16 October 2013 12:58:12 UTC+11, Jim Thompson wrote:> On Tue, 15 Oct 2013 21:48:05 -0400, krw@attt.bizz wrote: > >On Tue, 15 Oct 2013 18:18:37 -0700, Jim Thompson > ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Tue, 15 Oct 2013 18:45:23 -0500, John Fields > >><jfields@austininstruments.com> wrote: > >>>On Tue, 15 Oct 2013 16:29:32 -0700, John Larki > >>><jlarkin@highlandtechnology.com> wrote: > >>> > >>>>Me too! Plonk me too! > >>> > >>>Why ask someone else to do what you could so easily do yourself. ;) > > > >>SED has become like a leftist organization... the bombastic > >>egotistical ignorant claim supremacy and chastise those of us who kno > >>how semiconductors function when we point out their errors. > > > >Larkin's right. You are a senile old geezer. > > > >>I _will_not_stop_ pointing out the ignorant whether they froth (or is > >>it foam ?:-) at the mouth or not. > > > >Hell, you won't even remember in the morning. > > See what I mean about bombastic egotistical ignorance? All Larkin and > krw can manage is name-call.Jim-out-of-touch-with-reality-Thompson strikes again. John Larkin exhibits a much broader spectrum of ignorance than krw, and has been known to post circuit diagrams and LTSpice net-lists. We may be arguing precedence between a flea and a louse, but Larkin is definitely the performing flea and krw the crawling louse. -- Bill Sloman, Sydney
Reply by ●October 16, 20132013-10-16
> Jim-out-of-touch-with-reality-Thompson strikes again. > John Larkin exhibits a much broader spectrum of > ignorance than krw, and has been known to post > circuit diagrams and LTSpice net-lists. > > We may be arguing precedence between a flea > and a louse, but Larkin is definitely the > performing flea and krw the crawling louse. > > -- > Bill Sloman, SydneyHas your wife been catching on to you, slow man? Your rundown seems like a catharsis for you.
Reply by ●October 16, 20132013-10-16
On Wednesday, 16 October 2013 04:51:18 UTC+11, Phil Hobbs wrote:> On 10/15/2013 01:32 PM, John Larkin wrote: > > On Tue, 15 Oct 2013 13:23:58 -0400, Phil Hobbs > > <pcdhSpamMeSenseless@electrooptical.net> wrote: > >> On 10/15/2013 01:15 PM, John Larkin wrote: > >>> On Tue, 15 Oct 2013 13:04:01 -0400, Phil Hobbs > >>> <pcdhSpamMeSenseless@electrooptical.net> wrote: > >>>> On 10/15/2013 12:48 PM, George Herold wrote: > >>>>> On Tuesday, October 15, 2013 11:46:30 AM UTC-4, Phil Hobbs wrote: > >>>>>> On 10/15/2013 01:36 AM, Jim Thompson wrote: > >>>>>>> On Mon, 14 Oct 2013 21:56:43 -0700, miso <miso@sushi.com> wrote: > >>>>>>>>> > >>>>>>>>>> I'm curious about things like ESD capacitance. Given a test setup, > >>>>>>>>>> why would anyone *not* want to measure the power-off capacitance, > >>>>>>>>>> and then determine the C-V behavior? > >>>>>>>>> > >>>>>>>>> What "C-V behavior" are you referring to? > >>>>>>>>> > >>>>> <snip> > >>>>>> There are all kinds of CV measurements. MOSFET threshold is just > >>>>>> one--for instance, you can get the doping density vs. depth in a diode > >>>>>> by measuring C(V). I've learned a lot of interesting things about > >>>>>> photodiodes that way, but it's more commonly used for incoming > >>>>>> inspection of wafers--you use a mercury or (nowadays) gallium > >>>>>> electrode for the top contact. > >>>>> > >>>>> Hi Phil, Say do you have a good reference for the C-V doping density > >>>>> technique. > >>>>> > >>>>> I find a bit in Sze's book. I guess I can follow the references in > >>>>> there. > >>>> > >>>> It's pretty simple. The physics is that (in the 1D approximation), in > >>>> order to move the edge of the depletion zone from z to z+dz, you have to > >>>> create a sheet of charge > >>>> > >>>> d sigma = rho dz > >>>> > >>>> and the capacitance change is > >>>> > >>>> dC = A epsilon(1/(z+dz) - 1/z) ~ -A epsilon/z**2 dz. Here epsilon is > >>>> the dielectric constant of fully depleted silicon. > >>>> > >>>> The E field goes as the integral of the sheet charge elements > >>>> > >>>> E = 1/epsilon integral (0 to z) rho(z) dz > >>>> > >>>> and V is the line integral of the E field. > >>>> > >>>> V = integral (0 to z) E(z) dz > >>>> > >>>> So you get z from the capacitance, and then rho from the second > >>>> derivative of V with respect to z. Haven't got time to do the > >>>> derivation properly, but that's more or less how it goes. > >>>> > >>>> There are fine points having to do with where you take the origin of > >>>> voltage (probably the contact potential of the junction) and Deby > >>>> shielding, so some care is needed. > >>>> > >>>> What I found was that a lot of my favourite high-speed and > >>>> high-linearity PDs have a buried layer of higher doping, like an APD. > >>>> > >>>> Boonton 72BDs are all the go. > >>> > >>> I like the 72Bs with the analog meter. Very retro. > >> > >> I like them too, but the analogue display doesn't do the stability of > >> the meter justice. Once the 72BD is warmed up, it drifts somewhere > >> around a femtofarad per hour in my lab. It's good enough to use for a > >> capacitive gauge. > > > > I've been meaning to try a parallel-plate cap as a displacement > > transducer. Measuring nanometers ought to be easy. > > You want a differential cap to take out the thermal expansion.And a Blumlein (1:1 ratio transformer) AC bridge to compare the two capacitances. http://www.g3ynh.info/zdocs/refs/Blumlein/BritPat323037.html It's old technology - Blumlein patented his bridge in 1929 and my 1970 Ph.D. thesis has a bunch of useful references to tensioned diaphragm capacitance gauges. Baratron has been around for a while now. http://www.mksinst.com/product/Catalog.aspx?catalogID=4 -- Bill Sloman, Sydney
Reply by ●October 16, 20132013-10-16
On Wednesday, 16 October 2013 14:06:58 UTC+11, Greegor wrote:> > > Jim-out-of-touch-with-reality-Thompson strikes again. > > John Larkin exhibits a much broader spectrum of > > ignorance than krw, and has been known to post > > circuit diagrams and LTSpice net-lists. > > > > We may be arguing precedence between a flea > > and a louse, but Larkin is definitely the > > performing flea and krw the crawling louse.> Has your wife been catching on to you, slow man?I wonder what that was intended to mean?> Your rundown seems like a catharsis for you.My mother just died, and my kidney stone has been lithotripted into a very small pieces, which also seemed to turn off my right kidney for three days. Losing a parent - or what was left of her at 95 - probably qualifies as catharsis, but I don't need purification or cleansing to find an excuse to be rude about krw who must rate as the most despicable non-contributor to this usegroup. He doesn't like me much either. -- Bill Sloman, Sydney
Reply by ●October 16, 20132013-10-16
On Tue, 15 Oct 2013 18:18:37 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Tue, 15 Oct 2013 18:45:23 -0500, John Fields ><jfields@austininstruments.com> wrote: > >>On Tue, 15 Oct 2013 16:29:32 -0700, John Larkin >><jlarkin@highlandtechnology.com> wrote: >> >> >>>Me too! Plonk me too! >> >>--- >>Why ask someone else to do what you could so easily do yourself. ;) > >SED has become like a leftist organization... the bombastic >egotistical ignorant claim supremacy and chastise those of us who know >how semiconductors function when we point out their errors.--- Have you seen the movie: "Changeling"? --->I _will_not_stop_ pointing out the ignorant whether they froth (or is >it foam ?:-) at the mouth or not. > > ...Jim Thompson-- JF
Reply by ●October 16, 20132013-10-16
1. If you need parts fast, buy them with same day service. 2. If you had a buyer, they go thru distribution and can expedite. Purchasing volume speaks louder than online sample requests. 3. You ought to know parts with ultra low capacitance are easy to blow with capacitive discharge currents exceeding ESD clamp diode rating and possibly speed,... ESD speeds of pico seconds can be faster than diode response .... especially charged objects near carpets
Reply by ●October 16, 20132013-10-16
On Wed, 16 Oct 2013 00:11:34 -0500, John Fields <jfields@austininstruments.com> wrote:>On Tue, 15 Oct 2013 18:18:37 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Tue, 15 Oct 2013 18:45:23 -0500, John Fields >><jfields@austininstruments.com> wrote: >> >>>On Tue, 15 Oct 2013 16:29:32 -0700, John Larkin >>><jlarkin@highlandtechnology.com> wrote: >>> >>> >>>>Me too! Plonk me too! >>> >>>--- >>>Why ask someone else to do what you could so easily do yourself. ;) >> >>SED has become like a leftist organization... the bombastic >>egotistical ignorant claim supremacy and chastise those of us who know >>how semiconductors function when we point out their errors. > >--- >Have you seen the movie: "Changeling"? >--- > >>I _will_not_stop_ pointing out the ignorant whether they froth (or is >>it foam ?:-) at the mouth or not. >> >> ...Jim ThompsonNo. I'll look it up. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 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.
