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Marco,

ngspice-44.2 is available.

This is a bug-fix release, fixing some build issues and some recently 
removed source code bugs.

Regards

Holger




On 10/01/2025 19:48, Holger Vogt wrote:
> Marco,
> 
> you may need to build the standard ngspice.exe with
> 
> --with-readline=no
> --with-editline=yes
> 
> I have always tested building on Cygwin with readline. I will check 
> editline as well.
> 
> Holger
> 

build on the bot went fine
https://cygwin.com/cgi-bin2/jobs.cgi?id=9221

and that package is deployed in the distribution

Regards
Marco






On 10/01/2025 16:31, Holger Vogt wrote:
> Concerning the configure options:
> 
> Since ngspice-43 several options are included automatically:
> --enable-xspice, --enable-openmp, --enable-osdi, --enable-klu, --with- 
> readline=yes
> 
> option may be deselected for example by --disable-openmp, with-readline=no
> 
> When the shared ngspice libarary is to be made using --with-ngshared,
> neither readline nor editline options are required, as there is no 
> command input by users.


Cheking the configure --help , I noticed that is NOT obvious that
openmp is enabled by default as two lines are present

   --enable-openmp         Use OpenMP parallel processing
   --disable-openmp        do not use OpenMP

while for the others is more clear

  --disable-xspice        Disable XSPICE enhancements
  --disable-osdi          Disable OSDI integration
  --disable-klu           Use KLU linear systems solver. Default=yes.
                                                         ^^^^^^^^^^^^
partially misleading  default 😉

Regards
Marco






Marco,

you may need to build the standard ngspice.exe with

--with-readline=no
--with-editline=yes

I have always tested building on Cygwin with readline. I will check 
editline as well.

Holger



Am 10.01.2025 um 19:06 schrieb Marco Atzeri:
> On 10/01/2025 16:31, Holger Vogt wrote:
>> Concerning the configure options:
>>
>> Since ngspice-43 several options are included automatically:
>> --enable-xspice, --enable-openmp, --enable-osdi, --enable-klu, --with- 
>> readline=yes
>>
>> option may be deselected for example by --disable-openmp, with- 
>> readline=no
>>
>> When the shared ngspice libarary is to be made using --with-ngshared,
>> neither readline nor editline options are required, as there is no 
>> command input by users.
>>
> 
> Hi Holger,
>   I saw a configure failure for the shared library on the builder bot
> as the readline was not present.
> You may need to check it.
> 
> By long time the cygwin build is using the editline, I never looked to 
> change it until now.
> 
> I patched manually the code along the proposed patch and the shared 
> build worked. The standard one is still running but I expect same result
> 
> Regrds
> Marco
> 




On 10/01/2025 16:31, Holger Vogt wrote:
> Concerning the configure options:
> 
> Since ngspice-43 several options are included automatically:
> --enable-xspice, --enable-openmp, --enable-osdi, --enable-klu, --with- 
> readline=yes
> 
> option may be deselected for example by --disable-openmp, with-readline=no
> 
> When the shared ngspice libarary is to be made using --with-ngshared,
> neither readline nor editline options are required, as there is no 
> command input by users.
> 

Hi Holger,
  I saw a configure failure for the shared library on the builder bot
as the readline was not present.
You may need to check it.

By long time the cygwin build is using the editline, I never looked to 
change it until now.

I patched manually the code along the proposed patch and the shared 
build worked. The standard one is still running but I expect same result

Regrds
Marco




Concerning the configure options:

Since ngspice-43 several options are included automatically:
--enable-xspice, --enable-openmp, --enable-osdi, --enable-klu, 
--with-readline=yes

option may be deselected for example by --disable-openmp, with-readline=no

When the shared ngspice libarary is to be made using --with-ngshared,
neither readline nor editline options are required, as there is no 
command input by users.




The patch is available in the ngspice git master branch.

Do you have a chance to check if it is o.k?

I would then prepare a bug fix release tagged ngspice44.2.





Thanks for the report.

There is already a patch for this bug under way.

diff --git a/src/xspice/verilog/Makefile.am b/src/xspice/verilog/Makefile.am
index cd7674934..262d63384 100644
--- a/src/xspice/verilog/Makefile.am
+++ b/src/xspice/verilog/Makefile.am
@@ -19,11 +19,11 @@ initdata2_DATA = ../../include/ngspice/cosim.h \

  pkglib_LTLIBRARIES = ivlng.la ivlngvpi.la
  ivlng_la_SOURCES = icarus_shim.c icarus_shim.h coroutine_shim.h
-ivlng_la_CFLAGS = -I../../../../src/include
+ivlng_la_CFLAGS = -I$(top_srcdir)/src/include
  ivlng_la_LDFLAGS = -module -shared -avoid-version

  ivlngvpi_la_SOURCES = vpi.c icarus_shim.h vpi_user_dummy.h coroutine.h 
coroutine_cosim.h
-ivlngvpi_la_CFLAGS = -I../../../../src/include
+ivlngvpi_la_CFLAGS = -I$(top_srcdir)/src/include
  ivlngvpi_la_LDFLAGS = -module -shared  -avoid-version



Building on separate tree from source the build stop at:


make[3]: Entering directory 
'/pub/devel/ngspice/ngspice-44-1.x86_64/build/ngshared/src/xspice/verilog'
   CC       ivlng_la-icarus_shim.lo
/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44/src/xspice/verilog/icarus_shim.c:21:10: 
fatal error: ngspice/cmtypes.h: No such file or directory
    21 | #include "ngspice/cmtypes.h" // For Digital_t
       |          ^~~~~~~~~~~~~~~~~~~
compilation terminated.


configured with

                 --prefix=/usr \
                 --enable-xspice \
                 --enable-cider \
                 --enable-openmp \
                 --enable-osdi \
                 --enable-klu \
                 --with-editline=yes \
                 --with-ngshared


for what I see the file is in an expected location in the source tree

$ find ngspice-44-1.x86_64 -name cmtypes.h
ngspice-44-1.x86_64/origsrc/ngspice-44/src/include/ngspice/cmtypes.h
ngspice-44-1.x86_64/src/ngspice-44/src/include/ngspice/cmtypes.h


but the the Makefile.am of that verilog directory
is not written with proper declaration for separate tree:

marco@LAPTOP-MK4Q85AK 
/pub/devel/ngspice/ngspice-44-1.x86_64/build/ngshared/src/xspice/verilog
x86_64 $ make V=1
/bin/sh ../../../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H 
  -I. 
-I/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44/src/xspice/verilog 
-I../../../src/include  -I../../../../src/include -ggdb -O2 -pipe -Wall 
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=3 -fstack-protector-strong 
--param=ssp-buffer-size=4 
-ffile-prefix-map=/pub/devel/ngspice/ngspice-44-1.x86_64/build=/usr/src/debug/ngspice-44-1 
-ffile-prefix-map=/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44=/usr/src/debug/ngspice-44-1 
-std=gnu11 -fopenmp -MT ivlng_la-icarus_shim.lo -MD -MP -MF 
.deps/ivlng_la-icarus_shim.Tpo -c -o ivlng_la-icarus_shim.lo `test -f 
'icarus_shim.c' || echo 
'/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44/src/xspice/verilog/'`icarus_shim.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. 
-I/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44/src/xspice/verilog 
-I../../../src/include -I../../../../src/include -ggdb -O2 -pipe -Wall 
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=3 -fstack-protector-strong 
--param=ssp-buffer-size=4 
-ffile-prefix-map=/pub/devel/ngspice/ngspice-44-1.x86_64/build=/usr/src/debug/ngspice-44-1 
-ffile-prefix-map=/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44=/usr/src/debug/ngspice-44-1 
-std=gnu11 -fopenmp -MT ivlng_la-icarus_shim.lo -MD -MP -MF 
.deps/ivlng_la-icarus_shim.Tpo -c 
/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44/src/xspice/verilog/icarus_shim.c 
  -DDLL_EXPORT -DPIC -o .libs/ivlng_la-icarus_shim.o
/pub/devel/ngspice/ngspice-44-1.x86_64/src/ngspice-44/src/xspice/verilog/icarus_shim.c:21:10: 
fatal error: ngspice/cmtypes.h: No such file or directory
    21 | #include "ngspice/cmtypes.h" // For Digital_t
       |          ^~~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:538: ivlng_la-icarus_shim.lo] Error 1



Hello Qucs and Ngspice developer,

The Qucs-S v24.3.2 has been released. This version contains no new 
features, only fixed a critical bug: 
https://github.com/ra3xdh/qucs_s/issues/948

The release page is available here: 
https://github.com/ra3xdh/qucs_s/releases/tag/24.3.2
Installation instructions: 
https://github.com/ra3xdh/qucs_s/wiki/Installation

Regards,
Vadim Kuznetsov



Hello Qucs and Ngspice developer,

The Qucs-S v24.3.1 has been released. This version contains no new 
features, only bugfixes and small improvements. Fixed some critical bugs 
in plotting subsystem. The release packages has been built automatically 
using Github CI actions.

See the release notes and download links here: 
https://github.com/ra3xdh/qucs_s/releases/tag/24.3.1
The discussion page is here: 
https://github.com/ra3xdh/qucs_s/discussions/937
Installation instructions: 
https://github.com/ra3xdh/qucs_s/wiki/Installation

Regards,
Vadim Kuznetsov





Hello Qucs and Ngspice developers,

I am glad to present a new Qucs-S v21.3.0 release. The packages and 
installation instructions could be found at the release page: 
https://github.com/ra3xdh/qucs_s/releases/tag/24.3.0

This release contains a number of important improvements. Here are the 
main features added in v24.3.0:

* SpiceLibComp redesign. This device is renamed to /Spice Library 
Device/ and provides an easy way
to add SPICE model to schematic and assign symbol to it.
* Added possibity to import SPICE model for Diode, BJT, MOSFET, and JFET 
unified devices using special button in component properties
* Implemented symbol files editing
* Redesign of schematic rendering engine. Improve rendering quality on 
HiDPI displays
* Improved Qucsconv GUI to reflect new converter features
* Fixed ASCO operation using QucsatorRF
* QucsatorRF updated to version 1.0.1 This update mainly related to file 
formats comverter See 
https://github.com/ra3xdh/qucsator_rf/releases/tag/v1.0.1 for release notes
* Linux and WIndows binary packages switched to Qt6
* Implemented MacOS installation support using homebrew
* Introduced continuous releases

The full changelog could be found at the release page: 
https://github.com/ra3xdh/qucs_s/releases/tag/24.3.0 The Qucs-S package 
is not related to the recent revival of the old Qucs development.

Regards,
Vadim Kuznetsov
Thank you all for your help. I will refer to pspice manual.

On Wed, May 29, 2024 at 3:12 AM Holger Vogt <hol...@un...> wrote:

> ngspice offers more than 20 MOSFET models (see ngspice manual chapter
> 11.2).
>
> The user determines which model is selected, by providing suitable model
> paramaters with level and version information.
>
> All models can be used to simulate a differential amplifier.
>
> Skywater PDK simulation uses the BSIM4 MOS model, the parameters are
> provided by the PDK. Its equations are described in a user manual
> https://ngspice.sourceforge.io/external-documents/models/BSIM480_Manual.pdf.
>
> The equations are complex and not useful for hand calculation.
>
> The most simple model is the MOS1 model, unfortunately not suited for
> modern MOS processes. Its equations are described in the PSPICE manual
> https://www.seas.upenn.edu/~jan/spice/PSpice_ReferenceguideOrCAD.pdf on
> page 198.
>
>
> _______________________________________________
> Ngspice-devel mailing list
> Ngs...@li...
> https://lists.sourceforge.net/lists/listinfo/ngspice-devel
>

ngspice offers more than 20 MOSFET models (see ngspice manual chapter 11.2).

The user determines which model is selected, by providing suitable model 
paramaters with level and version information.

All models can be used to simulate a differential amplifier.

Skywater PDK simulation uses the BSIM4 MOS model, the parameters are 
provided by the PDK. Its equations are described in a user manual 
https://ngspice.sourceforge.io/external-documents/models/BSIM480_Manual.pdf. 
The equations are complex and not useful for hand calculation.

The most simple model is the MOS1 model, unfortunately not suited for 
modern MOS processes. Its equations are described in the PSPICE manual 
https://www.seas.upenn.edu/~jan/spice/PSpice_ReferenceguideOrCAD.pdf on 
page 198.



Hello ngspice Developers,
       I want to know what spice model is used in differential amplifier
with mosfet. Because in diff amp you are applying different voltage to gate
of mosfet. One mosfet going into saturation other going into cut-off. I
want to know what equation or model is used in simulating above behaviour.
In both cases you are applying gate voltages which are above threshold
voltage.

Thank you again for your help and I  look forward to hearing from you soon.
With warm regards,
Sourav Chatterjee

Hello Qucs and Ngspice developers,

I have recently prepared Qucs-S v24.2.1 hotfix release. This release 
contains no new features except the fix for the critical bug with DC 
bias simulation and the fix of Fedora RPM package build failure. See the 
release notes: https://github.com/ra3xdh/qucs_s/releases/tag/24.2.1

Regards,
Vadim Kuznetsov

On 25.03.24 21:55, Vadim Kuznetsov wrote:
> Hello Qucs and Ngspice developers,
>
> I am glad to present a new Qucs-S v24.2.0 release. The packages and 
> installation instructions could be found at the release page: 
> https://github.com/ra3xdh/qucs_s/releases/tag/24.2.0
>
> This release contains a number of important improvements. Here are the 
> main features added in v24.2.0:
>
> * QucsatorRF is now a part of the package; no need to compile and 
> install qucsator manually;
> * Qucs-RFLayout tool could be launched from Tools menu; this tool must 
> be installed separately. Refer to 
> https://github.com/thomaslepoix/Qucs-RFlayout
> * Redesign of the Qucsconv GUI
> * Matching tool backported from unreleased Qucs-0.0.20
> * Added RF devices group; backported different RF devices for Qucsator
>
> The full changelog could be found at the release page.
>
> Regards,
> Vadim Kuznetsov




Hello Qucs and Ngspice developers,

I am glad to present a new Qucs-S v24.2.0 release. The packages and 
installation instructions could be found at the release page: 
https://github.com/ra3xdh/qucs_s/releases/tag/24.2.0

This release contains a number of important improvements. Here are the 
main features added in v24.2.0:

* QucsatorRF is now a part of the package; no need to compile and 
install qucsator manually;
* Qucs-RFLayout tool could be launched from Tools menu; this tool must 
be installed separately. Refer to 
https://github.com/thomaslepoix/Qucs-RFlayout
* Redesign of the Qucsconv GUI
* Matching tool backported from unreleased Qucs-0.0.20
* Added RF devices group; backported different RF devices for Qucsator

The full changelog could be found at the release page.

Regards,
Vadim Kuznetsov



Hello Qucs and Ngspice developers,

I am glad to present a new Qucs-S v21.1.0 release. The packages and 
installation instructions could be found at the release page: 
https://github.com/ra3xdh/qucs_s/releases/tag/24.1.0

This release contains a number of important improvements. Here are the 
main features added in v24.1.0:

* Ngspice simulation support rework
* Added new devices
* Massive update of the libraries; added analog ICs libraries
* Added new RF features including RLCG support for SPICE
* Many HiDPI displays support improvements

The full changelog could be found at the release page.

Regards,
Vadim Kuznetsov



Just FYI -

https://www.accellera.org/news/press-releases/382-accellera-announces-proposed-working-group-to-explore-federated-simulation-standard

If anyone is interested in making a highly parallel multi-domain simulation
system using open source simulators, let me know.

Regards,
Kev.

Hello Qucs and Ngspice developers,

I am glad to present a new Qucs-S v2.0.0 release. The packages and 
installation instructions could be found at the release page: 
https://github.com/ra3xdh/qucs_s/releases/tag/2.1.0

This release contains a number of important improvements. Here are the 
main features added in v2.1.0:

* Added tuner simulation mode (used implementation by Kevin Voet)
* Added support for touchstone s2p file devices for Ngspice 
(implementation by Dan Dickey and Jim Mittel)
* Diagrams are placed on schematic and *.dpl files are disabled by default
* Toolbar icons replaced by SVG images; improved look for HiDPI
* Implemented automatic generation of high resolution device icons for 
the left panel

The full changelog could be found at the release page.

Regards,
Vadim Kuznetsov



Hello Qucs and Ngspice developers,

I am glad to present a new Qucs-S v2.0.0 release. The packages and 
installation instructions could be found at the release page: 
https://github.com/ra3xdh/qucs_s/releases/tag/2.0.0

This release contains an important change of the simulator switching 
system. The switching of the simulation kernel without restart of the 
application is possible now. See the release notes and documentation for 
more details.



Hello Qucs and Ngspice developers,

I am glad to present a new Qucs-S v1.1.0 release. The packages and 
installation instructions could be found at the release page 
https://github.com/ra3xdh/qucs_s/releases/tag/1.1.0

Here is the summary of changes:

    * Qucs-S supports digital simulation mode using IcarusVerilog or 
FreeHDL backends
    * Qucs-S runs DC bias simulation mode if schematic contains DC 
simulation only
    * Selection rectangle update



http://bsim.berkeley.edu/models/bsim4/

--
Kind regards,

Justin Fisher.


On Sat, May 13, 2023 at 6:18 AM Sourav Chatterjee <sou...@gm...>
wrote:

> Hi kelvin,
>          I want to know how it is modelled  in the stamp of mosfet? If you
> give some hints, it would be good.
> With regards,
>
> On Fri, May 12, 2023 at 11:19 PM Kevin Zheng <kev...@gm...> wrote:
>
>> Hi Sourav,
>>
>> On 5/12/23 7:55 AM, Sourav Chatterjee wrote:
>> >        I want to see the miller effect of mosfet. Anyone can give any
>> > suggestion how to add the effect in the matrix of stamp?
>>
>> The "Miller effect" is the apparent increase of a shunt capacitance
>> across an amplifier with inverting gain.
>>
>> It is already captured in SPICE simulation; you do not need to modify
>> device models to see the Miller effect.
>>
>> Regards,
>> Kevin
>>
> _______________________________________________
> Ngspice-devel mailing list
> Ngs...@li...
> https://lists.sourceforge.net/lists/listinfo/ngspice-devel
>

Hi kelvin,
         I want to know how it is modelled  in the stamp of mosfet? If you
give some hints, it would be good.
With regards,

On Fri, May 12, 2023 at 11:19 PM Kevin Zheng <kev...@gm...> wrote:

> Hi Sourav,
>
> On 5/12/23 7:55 AM, Sourav Chatterjee wrote:
> >        I want to see the miller effect of mosfet. Anyone can give any
> > suggestion how to add the effect in the matrix of stamp?
>
> The "Miller effect" is the apparent increase of a shunt capacitance
> across an amplifier with inverting gain.
>
> It is already captured in SPICE simulation; you do not need to modify
> device models to see the Miller effect.
>
> Regards,
> Kevin
>

Hi Sourav,

On 5/12/23 7:55 AM, Sourav Chatterjee wrote:
>        I want to see the miller effect of mosfet. Anyone can give any 
> suggestion how to add the effect in the matrix of stamp?

The "Miller effect" is the apparent increase of a shunt capacitance 
across an amplifier with inverting gain.

It is already captured in SPICE simulation; you do not need to modify 
device models to see the Miller effect.

Regards,
Kevin




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