Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > sci.electronics.design > #518409
| From | Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: really fast buffers |
| Date | 2018-10-05 11:26 +0200 |
| Message-ID | <g1op1aFlpdqU1@mid.individual.net> (permalink) |
| References | <gnaardpdk6o2lvfm2fd10d0b15mj8lpkgv@4ax.com> <pp62qv$92n$1@news.ox.ac.uk> <11bdrdlor3mq7sfgkaoovifrudjm64m93h@4ax.com> |
Am 05.10.2018 um 02:23 schrieb John Larkin: > On Thu, 4 Oct 2018 23:05:20 +0100, David Nadlinger > Nice, but it's all low-voltage differential. I need 5 volt swings in > and out. A real pain. And the receiver inputs after that will probably switch at 1.6V. > >> >> How stable do you need the propagation delay to be? > > My DUT will be spec'd to 1 ns accuracy (well, the customer wants 200 > ps, but that's silly) and maybe 30 ps RMS jitter. We'll have to > occasionally characterize all the component and traces and cable > delays in the test set, and fudge them out of the tests. Gigantic > pain. After that, we'd like things to be stable to maybe 100 ps. A customer of mine measured their cables in the temp chamber. That was real "fun". It is well-known that PTFE has a crystallization change at 23°C, where it hurts most, esp. when most quality cables are PTFE. If you want stable delays, it's probably best to try to be as fast as possible and then limit the BW with film R and NP0 C to sane values. Excess BW brings excess noise, brings excess jitter. Distributing a sine wave + a qualifier for the zero crossings takes cable dispersion out of the equation. One gains precisely located points in time but loses arbitrary edge position. regards, Gerhard
Back to sci.electronics.design | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-03 15:03 -0700
Re: really fast buffers Lasse Langwadt Christensen <langwadt@fonz.dk> - 2018-10-03 15:23 -0700
Re: really fast buffers Andy Bennet <andyb@andy.com> - 2018-10-04 08:20 +0100
Re: really fast buffers Lasse Langwadt Christensen <langwadt@fonz.dk> - 2018-10-04 08:45 -0700
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-03 15:52 -0700
Re: really fast buffers George Herold <gherold@teachspin.com> - 2018-10-03 18:08 -0700
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-03 20:02 -0700
Re: really fast buffers bitrex <user@example.net> - 2018-10-03 21:54 -0400
Re: really fast buffers Steve Wilson <9fe142ac@gmail.com> - 2018-10-03 20:10 -0700
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-03 20:40 -0700
Re: really fast buffers pcdhobbs@gmail.com - 2018-10-04 05:00 -0700
Re: really fast buffers Steve Wilson <9fe142ac@gmail.com> - 2018-10-04 08:39 -0700
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-04 12:38 -0400
Re: really fast buffers Steve Wilson <9fe142ac@gmail.com> - 2018-10-04 14:35 -0700
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-04 18:27 -0400
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-05 03:21 +0000
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-05 10:38 -0400
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-04 11:50 -0700
Re: really fast buffers Clifford Heath <no.spam@please.net> - 2018-10-05 09:26 +1000
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-04 17:09 -0700
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-05 03:12 +0000
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-05 14:18 -0700
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-05 23:42 +0000
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-06 14:41 -0400
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-05 03:09 +0000
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-05 10:40 -0400
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-05 11:06 -0400
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-05 19:16 -0700
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-05 14:26 -0700
Re: really fast buffers George Herold <gherold@teachspin.com> - 2018-10-05 18:36 -0700
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-05 19:22 -0700
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-06 02:28 +0000
Re: really fast buffers <698839253X6D445TD@nospam.org> - 2018-10-06 06:03 +0000
Re: really fast buffers Steve Wilson <9fe142ac@gmail.com> - 2018-10-05 23:41 -0700
Re: really fast buffers <698839253X6D445TD@nospam.org> - 2018-10-06 08:12 +0000
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-06 14:46 -0400
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-06 19:03 +0000
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-06 15:32 -0400
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-06 20:08 +0000
Re: really fast buffers Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-06 22:19 +0200
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-06 21:02 +0000
Re: really fast buffers tabbypurr@gmail.com - 2018-10-06 16:57 -0700
Re: really fast buffers krw@notreal.com - 2018-10-06 22:30 -0400
Re: really fast buffers Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-07 04:30 +0200
Re: really fast buffers <698839253X6D445TD@nospam.org> - 2018-10-07 07:15 +0000
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-07 08:24 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-07 18:51 -0700
Re: really fast buffers tabbypurr@gmail.com - 2018-10-08 08:16 -0700
Re: really fast buffers Winfield Hill <hill@rowland.harvard.edu> - 2018-10-07 07:19 -0700
Re: really fast buffers Robert Baer <robertbaer@localnet.com> - 2018-10-10 00:38 -0700
Re: really fast buffers tabbypurr@gmail.com - 2018-10-10 03:02 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-10 04:07 -0700
Re: really fast buffers DecadentLinuxUserNumeroUno@decadence.org - 2018-10-10 11:28 +0000
Re: really fast buffers Robert Baer <robertbaer@localnet.com> - 2018-10-11 22:06 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-12 00:08 -0700
Re: really fast buffers Robert Baer <robertbaer@localnet.com> - 2018-10-13 22:29 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-14 00:30 -0700
Re: really fast buffers Robert Baer <robertbaer@localnet.com> - 2018-10-15 19:38 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-15 20:55 -0700
Re: really fast buffers tabbypurr@gmail.com - 2018-10-14 04:31 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-14 07:29 -0700
Re: really fast buffers Robert Baer <robertbaer@localnet.com> - 2018-10-15 19:42 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-15 20:57 -0700
Re: really fast buffers tabbypurr@gmail.com - 2018-10-16 08:41 -0700
Re: really fast buffers krw@notreal.com - 2018-10-16 17:38 -0400
Re: really fast buffers bill.sloman@ieee.org - 2018-10-16 19:37 -0700
Re: really fast buffers bill.sloman@ieee.org - 2018-10-16 19:40 -0700
Re: really fast buffers Robert Baer <robertbaer@localnet.com> - 2018-10-15 19:40 -0700
Re: really fast buffers Robert Baer <robertbaer@localnet.com> - 2018-10-11 22:04 -0700
Re: really fast buffers tabbypurr@gmail.com - 2018-10-12 08:02 -0700
Re: really fast buffers Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-10 14:06 +0200
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-10 08:31 -0700
Re: really fast buffers Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-11 01:49 +0200
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-10 17:41 -0700
Re: really fast buffers "John Miles, KE5FX" <jmiles@gmail.com> - 2018-10-10 20:53 -0700
Re: really fast buffers Jasen Betts <jasen@xnet.co.nz> - 2018-10-11 05:47 +0000
Re: really fast buffers Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-11 12:35 +0200
Re: really fast buffers George Herold <gherold@teachspin.com> - 2018-10-06 12:39 -0700
Re: really fast buffers Steve Wilson <no@spam.com> - 2018-10-06 20:11 +0000
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-08 20:26 -0700
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-06 14:45 -0400
Re: really fast buffers George Herold <gherold@teachspin.com> - 2018-10-06 12:46 -0700
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-08 21:00 -0700
Re: really fast buffers Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-09 07:11 +0200
Re: really fast buffers Chris Jones <lugnut808@spam.yahoo.com> - 2018-10-09 23:20 +1100
Re: really fast buffers Jeroen Belleman <jeroen@nospam.please> - 2018-10-09 15:17 +0200
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-04 09:18 -0700
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-04 12:39 -0400
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-04 11:51 -0700
Re: really fast buffers Piotr Wyderski <peter.pan@neverland.mil> - 2018-10-08 13:19 +0200
Re: really fast buffers John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-08 08:52 -0700
Re: really fast buffers whit3rd <whit3rd@gmail.com> - 2018-10-04 11:57 -0700
Re: really fast buffers David Nadlinger <david@klickverbot.at> - 2018-10-04 23:05 +0100
Re: really fast buffers John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-04 17:23 -0700
Re: really fast buffers Gerhard Hoffmann <ghf@hoffmann-hochfrequenz.de> - 2018-10-05 11:26 +0200
Re: really fast buffers Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-05 10:44 -0400
csiph-web