Forums

SPICE model for HEMT ?

Started by Unknown April 28, 2017
I am faced with an odd problem. The HEMT lumped element
model in the paper: 
A Simple and Accurate Circuit Simulation Model for GaN
Power HEMTs
is very compact and intuitive, but the authors provide
no circuit parameter values for SPICE simulation.
The SPICE GaN model provided by GaN Systems at their 
Web site is too complicated/non-intuitive and throws 
lots of error messages with HSpice and NgSpice. Could
some fellow member of this newsgroup provide some 
pointers to some material that resolves the above issues ?
Thanks in advance for your help.
 
On Thu, 27 Apr 2017 20:48:25 -0700 (PDT), dakupoto@gmail.com wrote:

>I am faced with an odd problem. The HEMT lumped element >model in the paper: >A Simple and Accurate Circuit Simulation Model for GaN >Power HEMTs >is very compact and intuitive, but the authors provide >no circuit parameter values for SPICE simulation. >The SPICE GaN model provided by GaN Systems at their >Web site is too complicated/non-intuitive and throws >lots of error messages with HSpice and NgSpice. Could >some fellow member of this newsgroup provide some >pointers to some material that resolves the above issues ? >Thanks in advance for your help. >
How about E-mailing me a copy of the paper? Be sure to follow the instructions, send an E-mail _without_ any attachment, then I will E-mail you an approved E-mail address to send the attachment. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
On Thu, 27 Apr 2017 22:25:23 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Thu, 27 Apr 2017 20:48:25 -0700 (PDT), dakupoto@gmail.com wrote: > >>I am faced with an odd problem. The HEMT lumped element >>model in the paper: >>A Simple and Accurate Circuit Simulation Model for GaN >>Power HEMTs >>is very compact and intuitive, but the authors provide >>no circuit parameter values for SPICE simulation. >>The SPICE GaN model provided by GaN Systems at their >>Web site is too complicated/non-intuitive and throws >>lots of error messages with HSpice and NgSpice. Could >>some fellow member of this newsgroup provide some >>pointers to some material that resolves the above issues ? >>Thanks in advance for your help. >> > >How about E-mailing me a copy of the paper? > >Be sure to follow the instructions, send an E-mail _without_ any >attachment, then I will E-mail you an approved E-mail address to send >the attachment. > > ...Jim Thompson
Found paper. Worthless. Typical tripe from the PhD crowd... all paper, no touch >:-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
"Jim Thompson"  wrote in message 
news:fgi6gc1rnn0ptr8vujdatd9f4dq38vhiaq@4ax.com...

On Thu, 27 Apr 2017 22:25:23 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Thu, 27 Apr 2017 20:48:25 -0700 (PDT), dakupoto@gmail.com wrote: > >>I am faced with an odd problem. The HEMT lumped element >>model in the paper: >>A Simple and Accurate Circuit Simulation Model for GaN >>Power HEMTs >>is very compact and intuitive, but the authors provide >>no circuit parameter values for SPICE simulation. >>The SPICE GaN model provided by GaN Systems at their >>Web site is too complicated/non-intuitive and throws >>lots of error messages with HSpice and NgSpice. Could >>some fellow member of this newsgroup provide some >>pointers to some material that resolves the above issues ? >>Thanks in advance for your help. >> > >>How about E-mailing me a copy of the paper? > >>Be sure to follow the instructions, send an E-mail _without_ any >>attachment, then I will E-mail you an approved E-mail address to send >>the attachment. > > ...Jim Thompson
>Found paper. Worthless. Typical tripe from the PhD crowd... all >paper, no touch >:-}
Yep. I had a little look on their website at one of their models. As soon as I saw an "if " statement, I knew it was crap. -- Kevin Aylward http://www.anasoft.co.uk - SuperSpice http://www.kevinaylward.co.uk/ee/index.html
On Sat, 29 Apr 2017 19:08:21 +0100, "Kevin Aylward"
<kevinRemovAT@kevinaylward.co.uk> wrote:

>"Jim Thompson" wrote in message >news:fgi6gc1rnn0ptr8vujdatd9f4dq38vhiaq@4ax.com... > >On Thu, 27 Apr 2017 22:25:23 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Thu, 27 Apr 2017 20:48:25 -0700 (PDT), dakupoto@gmail.com wrote: >> >>>I am faced with an odd problem. The HEMT lumped element >>>model in the paper: >>>A Simple and Accurate Circuit Simulation Model for GaN >>>Power HEMTs >>>is very compact and intuitive, but the authors provide >>>no circuit parameter values for SPICE simulation. >>>The SPICE GaN model provided by GaN Systems at their >>>Web site is too complicated/non-intuitive and throws >>>lots of error messages with HSpice and NgSpice. Could >>>some fellow member of this newsgroup provide some >>>pointers to some material that resolves the above issues ? >>>Thanks in advance for your help. >>> >> >>>How about E-mailing me a copy of the paper? >> >>>Be sure to follow the instructions, send an E-mail _without_ any >>>attachment, then I will E-mail you an approved E-mail address to send >>>the attachment. >> >> ...Jim Thompson > >>Found paper. Worthless. Typical tripe from the PhD crowd... all >>paper, no touch >:-} > >Yep. > > >I had a little look on their website at one of their models. > >As soon as I saw an "if " statement, I knew it was crap. > > > >-- Kevin Aylward
Sno-o-o-ort >:-} You and I apparently have the same view of "IF" statements used _within_ a Spice model. However I sometimes do use "IF" statements to preset parameters (for the newbies/amateurs, that means they're inactive during the Spice run). ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
"Jim Thompson"  wrote in message 
news:6po9gctp30aftjknspt1bp7938l8cqugjo@4ax.com...

On Sat, 29 Apr 2017 19:08:21 +0100, "Kevin Aylward"
<kevinRemovAT@kevinaylward.co.uk> wrote:

>"Jim Thompson" wrote in message >news:fgi6gc1rnn0ptr8vujdatd9f4dq38vhiaq@4ax.com... > >On Thu, 27 Apr 2017 22:25:23 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Thu, 27 Apr 2017 20:48:25 -0700 (PDT), dakupoto@gmail.com wrote: >> >>>I am faced with an odd problem. The HEMT lumped element >>>model in the paper: >>>A Simple and Accurate Circuit Simulation Model for GaN >>>Power HEMTs >>>is very compact and intuitive, but the authors provide >>>no circuit parameter values for SPICE simulation. >>>The SPICE GaN model provided by GaN Systems at their >>>Web site is too complicated/non-intuitive and throws >>>lots of error messages with HSpice and NgSpice. Could >>>some fellow member of this newsgroup provide some >>>pointers to some material that resolves the above issues ? >>>Thanks in advance for your help. >>> >> >>>How about E-mailing me a copy of the paper? >> >>>Be sure to follow the instructions, send an E-mail _without_ any >>>attachment, then I will E-mail you an approved E-mail address to send >>>the attachment. >> >> ...Jim Thompson > >>Found paper. Worthless. Typical tripe from the PhD crowd... all >>paper, no touch >:-} > >Yep. > > >I had a little look on their website at one of their models. > >As soon as I saw an "if " statement, I knew it was crap. > > > >-- Kevin Aylward
>Sno-o-o-ort >:-}
>You and I apparently have the same view of "IF" statements used >_within_ a Spice model.
>However I sometimes do use "IF" statements to preset parameters (for >the newbies/amateurs, that means they're inactive during the Spice >run).
That's ok. The obvious issue, is that spice just don't like discontinuous derivatives... If I need an if else, I will use a gained (1+tanh()) and (tanch()-1) -- Kevin Aylward http://www.anasoft.co.uk - SuperSpice http://www.kevinaylward.co.uk/ee/index.html
On Sat, 29 Apr 2017 21:59:04 +0100, "Kevin Aylward"
<kevinRemovAT@kevinaylward.co.uk> wrote:

>"Jim Thompson" wrote in message >news:6po9gctp30aftjknspt1bp7938l8cqugjo@4ax.com... > >On Sat, 29 Apr 2017 19:08:21 +0100, "Kevin Aylward" ><kevinRemovAT@kevinaylward.co.uk> wrote: > >>"Jim Thompson" wrote in message >>news:fgi6gc1rnn0ptr8vujdatd9f4dq38vhiaq@4ax.com... >> >>On Thu, 27 Apr 2017 22:25:23 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Thu, 27 Apr 2017 20:48:25 -0700 (PDT), dakupoto@gmail.com wrote: >>> >>>>I am faced with an odd problem. The HEMT lumped element >>>>model in the paper: >>>>A Simple and Accurate Circuit Simulation Model for GaN >>>>Power HEMTs >>>>is very compact and intuitive, but the authors provide >>>>no circuit parameter values for SPICE simulation. >>>>The SPICE GaN model provided by GaN Systems at their >>>>Web site is too complicated/non-intuitive and throws >>>>lots of error messages with HSpice and NgSpice. Could >>>>some fellow member of this newsgroup provide some >>>>pointers to some material that resolves the above issues ? >>>>Thanks in advance for your help. >>>> >>> >>>>How about E-mailing me a copy of the paper? >>> >>>>Be sure to follow the instructions, send an E-mail _without_ any >>>>attachment, then I will E-mail you an approved E-mail address to send >>>>the attachment. >>> >>> ...Jim Thompson >> >>>Found paper. Worthless. Typical tripe from the PhD crowd... all >>>paper, no touch >:-} >> >>Yep. >> >> >>I had a little look on their website at one of their models. >> >>As soon as I saw an "if " statement, I knew it was crap. >> >> >> >>-- Kevin Aylward > >>Sno-o-o-ort >:-} > >>You and I apparently have the same view of "IF" statements used >>_within_ a Spice model. > >>However I sometimes do use "IF" statements to preset parameters (for >>the newbies/amateurs, that means they're inactive during the Spice >>run). > >That's ok. > >The obvious issue, is that spice just don't like discontinuous >derivatives... > >If I need an if else, I will use a gained (1+tanh()) and (tanch()-1) > >-- Kevin Aylward >http://www.anasoft.co.uk - SuperSpice >http://www.kevinaylward.co.uk/ee/index.html
As is well-known on this group, TANH is my absolute favorite function... all of my recent models that require bounding functions are implemented with variations on TANH. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Thinking outside the box... producing elegant solutions. "It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie