hoe to draw bidirectional dc dc converter for dc nano grid in ltspice

Started by chetan in sci.electronics.design3 years ago 28 replies

I need to design nonisolated dc-dc bidirectional converter for dc nano gride system. i am not sure how to draw in ltspice or in Matlab. please...

I need to design nonisolated dc-dc bidirectional converter for dc nano gride system. i am not sure how to draw in ltspice or in Matlab. please help me out. --


LTspice and noise analysis

Started by Jeroen Belleman in sci.electronics.design3 years ago 5 replies

After it got pointed out to me that in LTspice it was possible to tag resistor values with the 'noiseless' keyword, I reckoned it should also be...

After it got pointed out to me that in LTspice it was possible to tag resistor values with the 'noiseless' keyword, I reckoned it should also be possible to specify the temperature of a resistor. Indeed, it is possible to assign a value of '50 Temp=-196' to a resistor and to get the correct thermal noise contribution for that resistor in the noise analysis. I couldn't find any mention of i...


LTspice Tutorials now available

Started by Jim Thompson in sci.electronics.design8 years ago 6 replies

LTspice Tutorials now available on the Simulation Tools & Macros page of my website... http://www.analog-innovations.com/ ...

LTspice Tutorials now available on the Simulation Tools & Macros page of my website... http://www.analog-innovations.com/ ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |...


ltspice nmos4 and pmos4

Started by Michael Robinson in sci.electronics.design10 years ago 3 replies

I have to simulate a CMOS circuit and I am going to try it in LTSpice. The dialog box where you can put in parameters for a mos4 device has no...

I have to simulate a CMOS circuit and I am going to try it in LTSpice. The dialog box where you can put in parameters for a mos4 device has no place to enter parasitics! That means I need a subcircuit. To save time is there anyplace where I can grab subcircuits for nmos4 and pmos4 devices? That would save a lot of time, I can just change the values.


LTSpice MESFET models

Started by Phil Hobbs in sci.electronics.design10 years ago 11 replies

Back on topic for a bit: I'm getting back to work on the biochip preamp, and I'd really like a more realistic SPICE model than the...

Back on topic for a bit: I'm getting back to work on the biochip preamp, and I'd really like a more realistic SPICE model than the behavioural ones I cobbled together previously. There are various models in the Avago literature for their ATF3x143 pHEMTs, but nothing that I can persuade LTSpice to swallow. They publish something called a Statz MESFETM1 model, as follows: Statz Mod...


HC4046_VCO Now available as LTspice SCHEMATIC (.ASC)

Started by Jim Thompson in sci.electronics.design8 years ago 7 replies

Here is my first pass at the HC4046 (VCO portion only), now in LTspice format... ...Jim...

Here is my first pass at the HC4046 (VCO portion only), now in LTspice format... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems |


Adding a Full Selection of Parts to LTSpice

Started by Anonymous in sci.electronics.design8 years ago 2 replies

What is the most painless and straightforward way to add a full selection of "standard" compnents to the LTSpice library? For example, op...

What is the most painless and straightforward way to add a full selection of "standard" compnents to the LTSpice library? For example, op amps, regulators, CMOS IC's, switches, etc., as you would find in programs like DipTrace and EagleCad. This is the only thing I could find, but it looks a bit rough and possibly out-of-date. http://ltwiki.org/index.php5?title=Components_Library ...


LTSpice Sim Fails After Circuit Changes

Started by Kevin Foster in sci.electronics.design5 years ago 17 replies

I am using LTSpice XVII under WINE in Linux. The sim works when I start out but then fails (become inaccurate) after a time spent adding, moving...

I am using LTSpice XVII under WINE in Linux. The sim works when I start out but then fails (become inaccurate) after a time spent adding, moving and deleting components. If I wipe everything back to the simple start circuit it does not work correctly as it did originally, although the signal sources do. Is this a known problem and is there any way to get around it? Kevin Foster


LTSpice initial conditions

Started by bitrex in sci.electronics.design6 years ago 8 replies

Is there any way to use an LTSpice ".ic" command to make some node voltage equal to the supply voltage at the beginning of the simulation? Say...

Is there any way to use an LTSpice ".ic" command to make some node voltage equal to the supply voltage at the beginning of the simulation? Say I wanted to change the supply voltage and then have the initial condition voltage change automatically. ".ic V(my_node) = V(Vcc)" for example doesn't work.


Ltspice zooming into whole periods only

Started by electron in sci.electronics.design3 years ago 2 replies

Why doesn’t ltspice let me zoom into an exact region?? It always changes the zoom by a little when I let go of the mouse button after having...

Why doesn’t ltspice let me zoom into an exact region?? It always changes the zoom by a little when I let go of the mouse button after having selected my region of interest. It’s so annoying and I can’t get an exact whole period to measure it’s ems or average correctly!! Any workarounds ? Thanks


Virtual Private Servers for LTspice has it been tried?

Started by Fred in sci.electronics.design5 years ago 1 reply

I'm looking to use a Virtual Private Server (VPS) for running circuit simulations using LTspice and experiment with other software. (Some is...

I'm looking to use a Virtual Private Server (VPS) for running circuit simulations using LTspice and experiment with other software. (Some is business related and some is hobby related ) Due to restrictions I'm constrained to the software I can use at work and want to be able to demo the software (Yes, I can ask the IT department to install software but that's a hassle and as some is


LTspice model for DB3 DIAC

Started by P E Schoen in sci.electronics.design2 years ago 4 replies

I was trying to design a simple voltage relay in LTspice and I wanted to = use=20 a DIAC, but I had a hard time finding a model that worked....

I was trying to design a simple voltage relay in LTspice and I wanted to = use=20 a DIAC, but I had a hard time finding a model that worked. Finally I = found=20 the following in an obscure Japanese or Chinese website=20 http://bbs.dianyuan.com/topic/111118: * PSpice Model Editor - Version 9.2 *$ ********** *SRC=3DDB3; 32V 2A *DIAC *=B8=C4=B1=E4DZ=B5=C4BV=BF=C9=D2=D4=B8=C4=B1=E4Vbo ...


LTSpice in Windows 7 & 8

Started by Cursitor Doom in sci.electronics.design7 years ago 2 replies

Hi all, Does LTSpice run ok in the newer MS Windows versions? I can't keep a separate XP box for ever so am wondering if it'll run on Win 7 or...

Hi all, Does LTSpice run ok in the newer MS Windows versions? I can't keep a separate XP box for ever so am wondering if it'll run on Win 7 or Win 8. Anyone know? cd --- Diese E-Mail ist frei von Viren und Malware, denn der avast! Antivirus Schutz ist aktiv. http://www.avast.com


Installing LTSpice IV vs XVII

Started by Anonymous in sci.electronics.design3 years ago 16 replies

I'm on a newer machine that hasn't had LTSpice installed as yet. My most recent download is years old and won't update because ADI isn't...

I'm on a newer machine that hasn't had LTSpice installed as yet. My most recent download is years old and won't update because ADI isn't supporting the old Linear web site I suppose. I see they have an XP compatible download (LTS IV) which also wown't update and a newer XVII version which I expect is current. I recall someone here didn't want to use this newer version. Was that


LT1933 Circuit Wierdness

Started by Tim Wescott in sci.electronics.design8 years ago 11 replies

What am I doing wrong? I'm trying to simulate an LT1933 circuit, with LTSpice. The circuit works on the board, the schematic was basically...

What am I doing wrong? I'm trying to simulate an LT1933 circuit, with LTSpice. The circuit works on the board, the schematic was basically cut and pasted from the data sheet in the first place -- yet the simulation delivers less than 1/5 of both the data sheet and actual values!!! Might the latest & greatest LTSpice model for the LT1933 be flawed somehow? I'm puzzled -- and frust...


Small transformers and LTSpice simulation

Started by Grant in sci.electronics.design11 years ago 30 replies

I have a design that could use three or four winding toroid transformer. In the LTSpice notes they suggest keeping the transformer coupling...

I have a design that could use three or four winding toroid transformer. In the LTSpice notes they suggest keeping the transformer coupling at 1.0 or -1.0 otherwise there's lots of high frequency noise generated, I'm not sure if that's real world, or the simulation going silly? What I'm wondering is just how much coupling should I expect to see in a real world transformer of around f...


LT SPICE and FEMM

Started by Anonymous in sci.electronics.design4 years ago 8 replies

Hi, I have simulated a magnetic core inductor in FEMM. I want to simulate it in LTSPICE as a component. Can anyone guide me how to borrow this...

Hi, I have simulated a magnetic core inductor in FEMM. I want to simulate it in LTSPICE as a component. Can anyone guide me how to borrow this FEMM file to LTSPICE? I have generated the .dxf file for the design. erica 0 SECTION 2 HEADER 9 $INSBASE 10 0.0000 20 0.0000 9 $EXTMIN 10 -32.121320 20 -32.121320 9 $EXTMAX 10 32.121320 20 32.121320 9 $L...


Numerical Optimizer (Solver) for LTSpice

Started by Anonymous in sci.electronics.design9 years ago 16 replies

I have written a numerical optimizer (solver) for LTSpice. It automaticall= y adjusts component values to meet circuit performance targets you...

I have written a numerical optimizer (solver) for LTSpice. It automaticall= y adjusts component values to meet circuit performance targets you set. Fo= r example maximum power output and minimum supply current. It uses a fast = evolutionary algorithm to get good results quickly. You can get good result= s in anything from 5 minutes to a few hours depending on the complexity of = the circui...


Make LTSpice report an error

Started by Sylvia Else in sci.electronics.design5 years ago 4 replies

I'd like a way to make LTSpice report an error if one of my sub-circuits detects an invalid condition. For example, I often simulate a PIC by...

I'd like a way to make LTSpice report an error if one of my sub-circuits detects an invalid condition. For example, I often simulate a PIC by representing it as a sub-circuit that applies signals to its pins in accordance with the way I intend to program it. I'd like that sub-circuit to check, for example, that it has the correct voltage on its power and ground pins, and flag an error if...


AN: TL598 Spice Model

Started by Jim Thompson in sci.electronics.design6 years ago 44 replies

Awhile back someone on the LTspice List requested a TL598 Spice model. While somewhat obsolete, it intrigued me, and proved to be somewhat...

Awhile back someone on the LTspice List requested a TL598 Spice model. While somewhat obsolete, it intrigued me, and proved to be somewhat of a !#$* to model... but it caused me to develop a few new functions in my behavioral modeling repertoire. It can be found at TL598.zip on the Device Models & Subcircuits Page of my website... including an LTspice symbol. Modeling is based only fro...