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Phil Hobbs
Guest
Tue Dec 20, 2011 8:39 pm
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Thanks
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
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
TTman
Guest
Tue Dec 20, 2011 9:00 pm
"Phil Hobbs" <pcdhSpamMeSenseless_at_electrooptical.net> wrote in message
news:4EF0E47C.20009_at_electrooptical.net...
Quote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which comes
in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Thanks
are you talking about schematic or PCB representation ?
John Larkin
Guest
Tue Dec 20, 2011 9:24 pm
On Tue, 20 Dec 2011 14:39:40 -0500, Phil Hobbs
<pcdhSpamMeSenseless_at_electrooptical.net> wrote:
Quote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Thanks
Phil Hobbs
We create a part like that with two visible source pins on the
schematic symbol, and we wire both of them up on the schamatic.
ftp://jjlarkin.lmi.net/FSU02.jpg
John
Spehro Pefhany
Guest
Tue Dec 20, 2011 9:28 pm
On Tue, 20 Dec 2011 12:24:24 -0800, John Larkin
<jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
Quote:
On Tue, 20 Dec 2011 14:39:40 -0500, Phil Hobbs
pcdhSpamMeSenseless_at_electrooptical.net> wrote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Thanks
Phil Hobbs
We create a part like that with two visible source pins on the
schematic symbol, and we wire both of them up on the schamatic.
ftp://jjlarkin.lmi.net/FSU02.jpg
John
That's how I do it too. The internal connection is really just a
visual thing for the user of the schematic. Not sure if Eagle is any
different from Orcad, Altium etc.
How do those physical pins map to the SPICE model?
Phil Hobbs
Guest
Tue Dec 20, 2011 9:31 pm
On 12/20/2011 03:17 PM, George Herold wrote:
Quote:
On Dec 20, 2:39 pm, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Well I don't know if this is the 'right' way. But when I have
multiple pins connected to the same 'thing', then in the schematic
symbol I "name" the pins Source_at_2 and Source_at_4. I mostly do this with
power pins so it's V+@2 and V+@3.
George H.
Thanks, George, putting two source pins in the symbol works.
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
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
Phil Hobbs
Guest
Tue Dec 20, 2011 9:52 pm
On 12/20/2011 03:28 PM, Spehro Pefhany wrote:
Quote:
On Tue, 20 Dec 2011 12:24:24 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
On Tue, 20 Dec 2011 14:39:40 -0500, Phil Hobbs
pcdhSpamMeSenseless_at_electrooptical.net> wrote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Thanks
Phil Hobbs
We create a part like that with two visible source pins on the
schematic symbol, and we wire both of them up on the schamatic.
ftp://jjlarkin.lmi.net/FSU02.jpg
John
That's how I do it too. The internal connection is really just a
visual thing for the user of the schematic. Not sure if Eagle is any
different from Orcad, Altium etc.
How do those physical pins map to the SPICE model?
We were talking a few months back about Eagle & LTSpice users chipping
in to get somebody to make an Eagle <--> LTSpice schematic converter.
I'd still be interested if anybody else is.
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
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
George Herold
Guest
Tue Dec 20, 2011 10:17 pm
On Dec 20, 2:39 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:
Quote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Well I don't know if this is the 'right' way. But when I have
multiple pins connected to the same 'thing', then in the schematic
symbol I "name" the pins Source_at_2 and Source_at_4. I mostly do this with
power pins so it's V+@2 and V+@3.
George H.
Quote:
Thanks
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
845-480-2058
hobbs at electrooptical dot
nethttp://electrooptical.net
George Herold
Guest
Tue Dec 20, 2011 10:57 pm
On Dec 20, 3:31 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:
Quote:
On 12/20/2011 03:17 PM, George Herold wrote:
On Dec 20, 2:39 pm, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Well I don't know if this is the 'right' way. But when I have
multiple pins connected to the same 'thing', then in the schematic
symbol I "name" the pins Source_at_2 and Source_at_4. I mostly do this with
power pins so it's V+@2 and V+@3.
George H.
Thanks, George, putting two source pins in the symbol works.
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
845-480-2058
hobbs at electrooptical dot
nethttp://electrooptical.net- Hide quoted text -
- Show quoted text -
I was just playing around with an opamp with multiple power pins.
Even when I only attched only one in the schematic, they were all
shown connected in the 'rat's nest'.
(The @ symbol is nice 'casue it reminds you of the pin number when you
are connecting the symbol and package together.)
Oh here's a fun editing trick that a coworker recently found in
Eagle. If you hold down the scroll ball on the mouse and then drag
the mouse around it pans the display.
George H.
John Larkin
Guest
Tue Dec 20, 2011 11:42 pm
On Tue, 20 Dec 2011 15:28:48 -0500, Spehro Pefhany
<speffSNIP_at_interlogDOTyou.knowwhat> wrote:
Quote:
On Tue, 20 Dec 2011 12:24:24 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
On Tue, 20 Dec 2011 14:39:40 -0500, Phil Hobbs
pcdhSpamMeSenseless_at_electrooptical.net> wrote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Thanks
Phil Hobbs
We create a part like that with two visible source pins on the
schematic symbol, and we wire both of them up on the schamatic.
ftp://jjlarkin.lmi.net/FSU02.jpg
John
That's how I do it too. The internal connection is really just a
visual thing for the user of the schematic. Not sure if Eagle is any
different from Orcad, Altium etc.
How do those physical pins map to the SPICE model?
It's rare to get a Spice model for PHEMTS. Usually you get
s-parameters, and I assume both sources are grounded for that.
I do have Spice models for a few NEC phemts. The Spice model shows a
single source pin, with package inductance and resistance, and ignores
the fact that the package has two source pins.
John
langwadt@fonz.dk
Guest
Wed Dec 21, 2011 12:16 am
On 20 Dec., 20:39, Phil Hobbs <pcdhSpamMeSensel...@electrooptical.net>
wrote:
Quote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Thanks
before the new version 6 the only way to do it was to have the same
number
of pins and pads and then connect them at the schematic.
in version 6.0, you can connect on pin to mutiple pads, in the library
editor
it is called append
-Lasse
langwadt@fonz.dk
Guest
Wed Dec 21, 2011 12:22 am
On 20 Dec., 21:17, George Herold <gher...@teachspin.com> wrote:
Quote:
On Dec 20, 2:39 pm, Phil Hobbs
pcdhSpamMeSensel...@electrooptical.net> wrote:
I finally bit the bullet and got a copy of Eagle, because I need to do a
bunch of small proto boards. Initial impressions are positive, mostly
because it has a command line at the ready. Score.
The first device I tried creating is an Avago ATF35143 pHEMT, which
comes in a SC70-4 package with the source connected to pins 2 and 4.
There is no obvious way to tell Eagle that both 2 and 4 are connected to
the source.
What's the right way to do this?
Well I don't know if this is the 'right' way. But when I have
multiple pins connected to the same 'thing', then in the schematic
symbol I "name" the pins Source_at_2 and Source_at_4. I mostly do this with
power pins so it's V+@2 and V+@3.
all pins need a unique name, all the @x syntax does is hide the unique
part
so a symbol with several pins that look to have the same name. e.g.
vdd
What Phil is asking for is a symbol with one pin going to multiple
pads
-Lasse
Oppie
Guest
Wed Dec 21, 2011 3:26 am
Welcome to Eagle. Which version are you uing?
We first bought the professional package starting with version 4 then
upgraded to V5. Version 6 just came out last week and I'm taking my time
about getting an upgrade license. 30 minutes after the release, the first
bug reports came in.
Version 5 has been very stable and I may stay with it for a while yet.
You should definitely check out
news://news.cadsoft.de (no login needed)
I've gotten a lot of good information there.
Season's greetings - Oppie
Phil Hobbs
Guest
Wed Dec 21, 2011 6:09 am
On 12/20/2011 09:26 PM, Oppie wrote:
Quote:
Welcome to Eagle. Which version are you uing?
We first bought the professional package starting with version 4 then
upgraded to V5. Version 6 just came out last week and I'm taking my time
about getting an upgrade license. 30 minutes after the release, the
first bug reports came in.
Version 5 has been very stable and I may stay with it for a while yet.
You should definitely check out
news://news.cadsoft.de (no login needed)
I've gotten a lot of good information there.
Season's greetings - Oppie
Thanks. I'm using Eagle 5.7.0, because it runs in Kubuntu 10.04 LTS.
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
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
Oppie
Guest
Wed Dec 21, 2011 4:26 pm
"Phil Hobbs" <pcdhSpamMeSenseless_at_electrooptical.net> wrote in message
news:4EF169FD.1080806_at_electrooptical.net...
Quote:
Version 5 has been very stable and I may stay with it for a while yet.
You should definitely check out
news://news.cadsoft.de (no login needed)
I've gotten a lot of good information there.
Thanks. I'm using Eagle 5.7.0, because it runs in Kubuntu 10.04 LTS.
I run version 5.11
You might want to check the change log to see if any of the updates are
relevant to your work. If you download the Version 5.12 from
ftp://ftp.cadsoft.de/eagle/program/5.12/
you can either install it (Eagle new installs ALWAYS install in a new
directory so there is no worry about overwriting anything) or use winrar or
winzip to open the install file. Look at the contents of the "doc" directory
and you will find update_en.txt which is the change log. The user manual is
also here.
Having just written that, I have to do likewise to see if there is any
compelling reason to move from 5.11 to 5.12. I have the program set to
check when a new release is available and notify me. Never got a 5.12
notification...
If you have it, the autorouter is pretty good. Just be sure that your grids
are set appropriately or it will never route. There is also a 'follow-me'
router which I really like. No auto-place so just takes experience where to
put things.
Oppie
Phil Hobbs
Guest
Wed Dec 21, 2011 9:23 pm
Thanks for the wisdom on the last newbie question. I managed to finish
a simple schematic (1 pHEMT, one SiGe bipolar, and one fast op amp--a
whole 22 parts altogether).
Now for a board layout, and the next question. I figured out how to set
the design rules to make a four-layer board with two cores, with prepreg
in between. Now I need to make a ground plane. So far, I've done:
set layer 2 to be net GND, supply plane box checked in the DISPLAY dialogue
POLY GND
draw the polygon
autoroute (just for test purposes, honest)
The autoroute fails because it's trying to put everything on layer 1,
and it ignores the ground plane almost entirely--it routes the grounds,
and it makes no vias or thermals in the ground plane. Except for
one--it makes a big hole under the Pin 1 mark on the IC package, which
is drawn as a wire in the package editor.
How do I get Eagle to recognize the ground plane as a ground plane?
How do I get the autorouter to use more than one layer?
Thanks
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
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
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