Qucs Roadmap

The QUCS Roadmap should serve as base to track the status of each action point. Enhancements can be handled in two ways:

• For simpler enhancements an issue/bug ticket shall be created and referenced back here. The pertinent discussion and documentation should be done on the body of each ticket.
• For more complex enhancements a Qucs Enhancement Proposal should be created and reference back here.

The open action points can be further categorized concerning the difficulty or amount of work as (Easy, Medium, Hard) and priority (0-3, 0 is the highest). See the Port to Qt4 / Qt5 for an example. Tickets will be tracked individually and assigned to milestones leading to stable releases.

Stage 1 - Simple GUI and simulator  

Stage 2 - Implementation of powerful circuit analysis tools

Stage 3 - Support for more design and synthesis tools  

Stage 4 - Implementation of industry standard device models

Stage 5 - Design realization, production, verification

Read more about QUCS Roadmap

Bio-SPICE

Bio-SPICE: Biological Simulation Program for Intra- and Inter-Cellular Evaluation

 

Bio-SPICE, an open source framework and software toolset for Systems Biology, is intended to assist biological researchers in the modeling and simulation of spatio-temporal processes in living cells. In addition, our goal is to develop and serve a user community committed to using, extending, and exploiting these tools to further our knowledge of biological processes.

In collaboration with other Bio-SPICE, Community members, we will develop, license, distribute, and maintain a comprehensive software environment that integrates a suite of analytical, simulation, and visualization tools and services to aid biological researchers engaged in building computable descriptions of cellular functions. From disparate data analysis and information mining to experimental validation of computational models of cell systems, our environment will offer a comprehensive substrate for efficient research, collaboration, and publication.

Mission
Bio-SPICE, is intended for modeling and simulation of spatio-temporal processes in living cells. The goals of Bio-SPICE, are to support discovery through:

1. Developing computational and mathematical models of bio-molecular systems in cells capturing the nature of gene-protein interactions
2. Developing tools that can rapidly incorporate relevant experimental data and knowledge known in the literature to build models of pathways, networks, and spatial processes
3. Developing simulation tools for the dynamic analysis of bio-molecular systems
4. Creating an extensible framework for easy insertion of models and their refinement, as well as customization to specific mechanisms

In addition, our goal is to develop and serve a user community committed to using, extending, and exploiting these tools to further our knowledge of biological processes. In collaboration with other Bio-SPICE Community members, we will develop, license, distribute, and maintain a comprehensive software environment that integrates a suite of analytical, simulation, and visualization tools and services to aid biological researchers engaged in building computable descriptions of cellular functions. From disparate data analysis and information mining to experimental validation of computational models of cell systems, our environment will offer a comprehensive substrate for efficient research, collaboration, and publication [read more...]

[paper] III-V Channel Double Gate FETs

Compact Modeling of Charge, Capacitance, and Drain Current
in III-V Channel Double Gate FETs

C. Yadav; M. Agrawal; A. Agarwal; Y. S. Chauhan

in IEEE Transactions on Nanotechnology , vol.PP, no.99, pp.1-1
doi: 10.1109/TNANO.2017.2669092

Abstract: In this paper, we present a surface potential based compact modeling of terminal charge, terminal capacitance, and drain current for III-V channel double gate field effect transistor (DGFET) including the effect of conduction band nonparabolicity. The proposed model is developed accounting for the 2-D density of states and includes the effect of quantum capacitance associated with the low density of states channel material. In addition, model incorporates contribution of the first two subbands and efficiently captures the step like behavior appearing in the gate capacitance and trans-conductance with population of the higher sub-bands. The behavior of bias dependent terminal capacitances and drain current are verified with the numerical simulation data of InGaAs channel DGFET and shows a close agreement with the simulation data [read more...]

[mos-ak] [Final Program] Spring MOS-AK Workshop at DATE Conference in Lausanne, March 31, 2017

 Spring MOS-AK Workshop  

   at DATE Conference in Lausanne, March 31, 2017
     Final Program online http://mos-ak.org/lausanne_2017/   

 
 Together with the MOS-AK workshop chair, Dr. Jean-Michel Sallese, EPFL and International MOS-AK Board of R&D Advisers: Larry Nagel, Omega Enterprises Consulting (USA), Andrei Vladimirescu, UCB (USA); ISEP (FR) as well as all the Extended MOS-AK TPC Committee, we have pleasure to invite to the Spring MOS-AK Workshop which will be held during DATE Conference on March 31, 2017 in Lausanne (CH). The MOS-AK workshop is organized with aims to strengthen a network and discussion forum among experts in the field, enhance open platform for information exchange related to compact/SPICE modeling and Verilog-A standardization, bring people in the compact modeling field together, as well as obtain feedback from technology developers, circuit designers, and CAD/EDA tool developers and vendors. 

Important Dates:

• Preannouncement - Dec. 2016
  
• Call for Papers - Jan. 2017
  
• Final Workshop Program - Feb. 2017
  
• MOS-AK Workshop - March 31, 2017

Venue:

Swisstech Convention Centre Quartier Nord de l'EPFL Route Louis-Favre 2 CH-1024 Ecublens (CH)

Final Program of Spring MOS-AK/DATE workshop is available online
http://www.mos-ak.org/lausanne_2017/

Online MOS-AK/DATE Workshop Registration

https://www.date-conference.com/registration
(any related inquiries can be sent to register@mos-ak.org)

Postworkshop Publications:
Selected best MOS-AK technical presentation will be recommended for further publication
in a special issue of the International Journal of High Speed Electronics and Systems

Extended MOS-AK Committee

WG280217

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[ngspice] FM Bugger Circuit

Project Summary by https://www.eeweb.com
The project circuit design is a FM Bugger circuit. It works like a transmitter that transmits and projects information signals into the air wherein a FM radio will act as a receiver which would receive the transmitted signal. The circuit and the FM radio must be tuned-in with the same frequency to be able to transmit and receive information in the same channel. The FM bugger circuit is originally designed to be used like a spy gadget to eavesdrop other people’s conversations. Though it is designed that way, it is pretty much useful as a transmitter or as a walkie-talkie to relay messages in a distance [read more...]

Testing and Design Procedure
The FM bugger circuit is tested using PartSim and the NGSpice to test the output of the circuit:

FM Bugger Circuit Simulation
R1 Net1009 Mic 22K
R2 Net1009 Net1016 47K
R3 Net1003 0 33K
C1 Net1016 Mic 1NF
C2 Net1016 0 1NF
C3 Net1002 Net1003 4.7pF
C4 Net1002 Antenna 1NF
C5 Net1009 0 22NF
C6 Net1009 Net1002 50pF
L1 Net1009 Net1002 9NH
Q1 Net1002 Net1016 Net1003 2N2222
V1 Net1009 0 3V
V2 Mic 0 SINE ( 1 1 20Khz 0.0S )
R4 0 Antenna 1K
.options rshunt = 1.0e12 KEEPOPINFO
.MODEL 2N2222 NPN IS =3.0611E-14 NF =1.00124
+ BF =220 IKF=0.52 VAF=104 
+ ISE=7.5E-15 NE =1.41 NR =1.005 BR =4 
+ IKR=0.24 VAR=28 ISC=1.06525E-11 NC =1.3728 RB =0.13 
+ RE =0.22 RC =0.12 CJC=9.12E-12 MJC=0.3508 VJC=0.4089 
+ CJE=27.01E-12 TF =0.325E-9 TR =100E-9
.control
OP
write Net1002 Net1003 Net1009 Net1016 Mic Antenna I(V1) I(V2)
set appendwrite true
rusage everything
.endc
.end

Conclusion
The simulation of the FM bugger circuit in PartSim shows that the circuit is working. The microphone was assumed to have an input of a 20 kHz sinusoidal wave. Then, the output signal at the load, R4 assumed to be the antenna for the circuit, turns out to produce a FM signal. Therefore, the FM bugger circuit itself has a great possibility to succeed and operate in real

Project Links:
http://www.schematics.com/embed/fm-bugger-circuit-36638/
http://www.pcbweb.com/projects/DqEwZcNdcy3ddghPnJefdJIzTcWqLd

[paper] Readout electronics for LGAD sensors

Readout electronics for LGAD sensors

O. Alonso,^a N. Franch,^a J. Canals,^a F. Palacio,^a M. López,^a A. Vilà,^a A. Diéguez,^a
M. Carulla,^b D. Flores,^b S. Hidalgo,^b A. Merlos,^b G. Pellegrini^b and D. Quirion^b
aDepartment of Engineering: Section of Electronics, University of Barcelona,
C/ Martí i Franquès nº1, Barcelona, 08028 Spain
^bInstituto de Microelectrónica de Barcelona — Centro Nacional de Microelectrónica (IMB-CNM),
Campus UAB, Cerdanyola del Vallès, Bellaterra, Barcelona, 08193 Spain
doi:10.1088/1748-0221/12/02/C02069

Abstract: In this paper, an ASIC fabricated in 180 nm CMOS technology from AMS with the very front-end electronics used to readout LGAD sensors is presented as well as its experimental results. The front-end has the typical architecture for Si-strip readout, i.e., preamplification stage with a Charge Sensitive Amplifier (CSA) followed by a CR-RC shaper. Both amplifiers are based on a folded cascode structure with a PMOS input transistor and the shaper only uses passive elements for the feedback stage. The CSA has programmable gain and a configurable input stage in order to adapt to the different input capacitance of the LGAD sensors (pixelated, short and long strips) and to the different input signal (depending on the gain of the LGAD). The fabricated prototype has an area of 0.865mm  0.965mm and includes the biasing circuit for the CSA and the shaper, 4 analog channels (CSA+shaper) and programmable charge injection circuits included for testing purposes. A first approach to find the proper dimensioning of the input transistor has been done using a Matlab script, where the transconductance value has been calculated with the EKV model

Acknowledgments This work has been partially funded by the Spanish national projects FPA2013-48387 and FPA2015-71292. In addition, this work has been done in the framework of RD50 CERN collaboration.

1-cent "lab on a chip" could save lives

Rahim Esfandyarpour, Stanford University, helped to develop a way to create a diagnostic "lab on a chip" for just a penny:
"I'm pretty sure it will open a window for researchers because it makes life much easier for them - just print it and use it," said Esfandyarpour. The results of this research were recently published in the journal Proceedings of the National Academy of Sciences [Source: Stanford Medicine]