Schematic preferences
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From: krw on 19 Jan 2010 20:00 On Tue, 19 Jan 2010 12:04:48 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> wrote: >On Tue, 19 Jan 2010 18:53:02 GMT, nico(a)puntnl.niks (Nico Coesel) >wrote: > >>D Yuniskis <not.going.to.be(a)seen.com> wrote: >> >>>Hi, >>> >>>Of course, this is *highly* subjective -- but, I'd enjoy hearing >>>folks' "conventions" used when preparing schematics (that *others* >>>will consume -- how you scribble for your own purposes isn't >>>important as it depends a lot on what *you* want out of the >>>drawing). >>> >>>I try to follow some general rules -- but also feel free to bend >>>them as needed. Most have evolved over the years from different >>>employers, standards, experience, etc. >>> >>>E.g., I *tend* to prefer landscape orientation -- though I >>>drew a B size "portrait" this morning in lieu of a C size >>>landscape. >> >>That depends on your printer. On a shitty printer A4/letter size may >>be the maximum for a readable diagram while a good printer will allow >>for much more on one page. > >I rarely produce paper schematics... everything is distributed via >Acrobat... everything from A to E-size. You rarely have to sit down in the lab, in front of a scope and debug the design. ;-) >Thus my layout guy can then zoom in for something he can't quite make >out. (The ultimate check is called "LVS", layout-vs-schematic, where >netlists I generate are compared to the netlists that the layout >program generates.) > >I've also kissed off Power Point for presentations. I can do it >better in Acrobat with "push/pop" hierarchical schematics, allowing me >to zip around during design reviews to exactly what the audience wants >to see. > >I can print up to 13" x 19" on my wife's HP Officejet Pro K850, but I >rarely do. > > ...Jim Thompson
From: Joel Koltner on 19 Jan 2010 20:02 "krw" <krw(a)att.bizzzzzzzzzzz> wrote in message news:cckcl59viig97bhnjl1mfmqnuefbblf0ch(a)4ax.com... > Our shields mount on solder balls. The balls are shown in the corner > with a billion ground connections. One nice thing Pulsonix lets you do is to "multiply-instance" a component... you can name, e.g., a mounting hole MH[1:6] and connect it to ground, and on the layout -- poof! -- you get six grounded mounting holes. ORCAD of course doesn't do this, having almost zero significant new development performed in something like a decade now.
From: Jim Thompson on 19 Jan 2010 20:08 On Tue, 19 Jan 2010 16:59:54 -0800, "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: >"Robert Baer" <robertbaer(a)localnet.com> wrote in message >news:puOdnTDeTaWpz8vWnZ2dnUVZ_jednZ2d(a)posted.localnet... >> All 3 or 4 wire connections shown with de dots, if a wire must cross >> another but NOT connect, then use a half-circle to graphically show one >> "goes around" the other. > >Visio does this, but I've never met an actual schematic capture program that >does. I'm not sure I'd want to use such a feature personally, but it would be >a nice option, certainly. If I thought that would be useful, in PSpice Schematics I'd simply create a part. But I prefer to avoid the problem. But I will admit to recently creating parts that overlay, allowing a representation of ESD structures associated with a PAD, AND netlisting properly. But this is not for amateurs... you need to understand the power of netlists for data transfers. ...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.
From: Jim Thompson on 19 Jan 2010 20:12 On Tue, 19 Jan 2010 19:00:26 -0600, krw <krw(a)att.bizzzzzzzzzzz> wrote: >On Tue, 19 Jan 2010 12:04:48 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> wrote: > >>On Tue, 19 Jan 2010 18:53:02 GMT, nico(a)puntnl.niks (Nico Coesel) >>wrote: >> >>>D Yuniskis <not.going.to.be(a)seen.com> wrote: >>> >>>>Hi, >>>> >>>>Of course, this is *highly* subjective -- but, I'd enjoy hearing >>>>folks' "conventions" used when preparing schematics (that *others* >>>>will consume -- how you scribble for your own purposes isn't >>>>important as it depends a lot on what *you* want out of the >>>>drawing). >>>> >>>>I try to follow some general rules -- but also feel free to bend >>>>them as needed. Most have evolved over the years from different >>>>employers, standards, experience, etc. >>>> >>>>E.g., I *tend* to prefer landscape orientation -- though I >>>>drew a B size "portrait" this morning in lieu of a C size >>>>landscape. >>> >>>That depends on your printer. On a shitty printer A4/letter size may >>>be the maximum for a readable diagram while a good printer will allow >>>for much more on one page. >> >>I rarely produce paper schematics... everything is distributed via >>Acrobat... everything from A to E-size. > >You rarely have to sit down in the lab, in front of a scope and debug >the design. ;-) But I have. On complex chips like the first Garmin GPS chip, I sat there in Burlington with the IBM test guys correlating test data to the test plan, and creating a final probe test procedure. Rare now-a-days, everything always comes up working ;-) > >>Thus my layout guy can then zoom in for something he can't quite make >>out. (The ultimate check is called "LVS", layout-vs-schematic, where >>netlists I generate are compared to the netlists that the layout >>program generates.) >> >>I've also kissed off Power Point for presentations. I can do it >>better in Acrobat with "push/pop" hierarchical schematics, allowing me >>to zip around during design reviews to exactly what the audience wants >>to see. >> >>I can print up to 13" x 19" on my wife's HP Officejet Pro K850, but I >>rarely do. >> >> ...Jim Thompson ...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.
From: krw on 19 Jan 2010 20:26
On Tue, 19 Jan 2010 16:59:54 -0800, "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: >"Robert Baer" <robertbaer(a)localnet.com> wrote in message >news:puOdnTDeTaWpz8vWnZ2dnUVZ_jednZ2d(a)posted.localnet... >> All 3 or 4 wire connections shown with de dots, if a wire must cross >> another but NOT connect, then use a half-circle to graphically show one >> "goes around" the other. > >Visio does this, but I've never met an actual schematic capture program that >does. I'm not sure I'd want to use such a feature personally, but it would be >a nice option, certainly. Visio also allows you to leave a break for crossings; much nicer than speed bumps. Both speed bumps and gaps are programmable. | | | | | | | | -------------------------- -------------+--------- | | | | | | | No connection Connection |