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Groups > sci.electronics.design > #446865
| Subject | Re: Difference Amp. |
|---|---|
| Newsgroups | sci.electronics.design |
| References | (4 earlier) <6bc498dd-1cd9-4432-b788-0c480995ad7b@googlegroups.com> <8orm9c97e2gp9l3ndvufuh4sl4eshmh12n@4ax.com> <0ksm9c924gn6ppsbtfic5d9uve2b7l6vmm@4ax.com> <n_KdnZb4b9ZzFQbFnZ2dnUU7-U2dnZ2d@supernews.com> <9c2n9cdhio40hpg79fcd0ulbj651cm07t9@4ax.com> |
| From | Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> |
| Date | 2017-02-08 16:15 -0500 |
| Message-ID | <n_KdnZP4b9bMFwbFnZ2dnUU7-U2dnZ2d@supernews.com> (permalink) |
On 02/08/2017 04:12 PM, Jim Thompson wrote: > On Wed, 8 Feb 2017 16:09:14 -0500, Phil Hobbs > <pcdhSpamMeSenseless@electrooptical.net> wrote: > >> On 02/08/2017 02:34 PM, Jim Thompson wrote: >>> On Wed, 08 Feb 2017 12:20:33 -0700, Jim Thompson >>> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>> >>>> On Wed, 8 Feb 2017 10:58:57 -0800 (PST), George Herold >>>> <gherold@teachspin.com> wrote: >>>> >>>> [snip >>>> >>>>> >>>>> Say, Here's a somewhat related question. I'll often use an inverting amp >>>>> to make input connection to the outside world. (With input R's ranging from >>>>> 1 k to 1 Meg ohm.) I figure the opamp has some input protection and adding more >>>>> series R is only going to make it better. Is that kosher? >>>>> (It's never caused me any problems yet.) >>>>> >>>>> George H. >>>>> >>>>>> >>>> [snip] >>>> >>>> Diodes from summing junction to ground will make it very robust. >>> >>> Anti-parallel. Is that called back-to-back or belly-to-belly ?:-} >>> >> Yup. Back-to-back is inverse series, as in "back-to-back zeners". >> >> Cheers >> >> Phil Hobbs > > So belly-to-belly anti-parallel ?:-} > > ...Jim Thompson > This is a family show. (For values of "family" corresponding to dates before 1965.) Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
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Difference Amp. George Herold <gherold@teachspin.com> - 2017-02-07 12:56 -0800
Re: Difference Amp. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-07 16:40 -0500
Re: Difference Amp. gghero27@gmail.com - 2017-02-07 17:47 -0800
Re: Difference Amp. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-08 11:45 -0500
Re: Difference Amp. George Herold <gherold@teachspin.com> - 2017-02-08 10:58 -0800
Re: Difference Amp. Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-08 12:20 -0700
Re: Difference Amp. Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-08 12:34 -0700
Re: Difference Amp. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-08 16:09 -0500
Re: Difference Amp. Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-08 14:12 -0700
Re: Difference Amp. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-08 16:15 -0500
Re: Difference Amp. Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-08 14:21 -0700
Re: Difference Amp. George Herold <gherold@teachspin.com> - 2017-02-08 16:28 -0800
Re: Difference Amp. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-08 16:08 -0500
Re: Difference Amp. gghero27@gmail.com - 2017-02-07 17:47 -0800
Re: Difference Amp. sdy <sdeyoreo@hotmail.com> - 2017-02-07 16:20 -0800
Re: Difference Amp. gghero27@gmail.com - 2017-02-07 17:50 -0800
Re: Difference Amp. John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-08 12:45 -0800
Re: Difference Amp. John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-07 17:22 -0800
Re: Difference Amp. Winfield Hill <hill@rowland.harvard.edu> - 2017-02-07 17:40 -0800
Re: Difference Amp. Robert Latest <boblatest@yahoo.com> - 2017-02-08 18:10 +0000
Re: Difference Amp. Winfield Hill <hill@rowland.harvard.edu> - 2017-02-08 12:06 -0800
Re: Difference Amp. Robert Latest <boblatest@yahoo.com> - 2017-02-09 17:55 +0000
Re: Difference Amp. Kamen Lilov <kamenl@gmail.com> - 2017-02-08 11:25 -0800
Re: Difference Amp. George Herold <gherold@teachspin.com> - 2017-02-08 12:41 -0800
Re: Difference Amp. George Herold <gherold@teachspin.com> - 2017-02-08 12:47 -0800
Re: Difference Amp. krw@notreal.com - 2017-02-08 20:43 -0500
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