Hello, everyone i want to invert a high level voltage through schmitt inverter , but the data spec show the high level threshold is not as ltspice original setting 50%, so can anyone teach me how to modify the threshold? where can i give the command or modify the parameter? thanks a lot !!!!

Hello I have tried to implement a model created by eetech00 called UCC5304_Test.zip uploaded in Files section. The LTspice files and models i made were uploaded into sim_mos_driver2 folder below. How I got an error shown in the attached photo.What gone wrong when i tried to use the symbol created by eetech00 good model? https://groups.io/g/LTspice/files/Temp/sim_mos_driver2 https://groups.io/g/LTspice/photo/294810/3782163?p=Created%2C%2C%2C20%2C2%2C0%2C0 Thanks.

I'm only using LTSpice at hobby level. I've created a component for bi-di current-sense amplifier INA181 from PSpice model supplied by TI and a little test schematic (https://groups.io/g/LTspice/files/Temp/ina181a1-test.zip). But using an inductor as load simulation stops with "Singular matrix" error. And with a resistor it gets very slow after a while and output looks not as expected. Maybe someone can make this work better.

Hello, I want to simulate a mutual inductance LM in function of a coupling factor k. The mutual inductance also depends on the self-inductances L1 and L2, which are constant values. The T-circuit gives an error message due to a missing value for the inductance L1-LM. Can someone help me find a solution to simulate this circuit? Please see the files in the folder: IPT_LM Thanks in advance, Elien

Dear all, Hope you all are fine, here i wanna ask one problem regarding 74hc4046 PLL with vco . i use the model of said IC from this group. i uploaded all material related to schematic in .zip folder under temp folder. Kindly @Andy and other related experts review that file and suggest me, because by changing the values of Resistors and capacitor , there is no change at output waveform... please guide me why is it ??? Description already written with attached folder. Anxiously waiting for your prompt and kind reply.. Regards

Hello, I need little help, please. I am trying to run old square wave vco model: *Voltage Controlled Square Wave Oscillator *LOW = Peak output low value *HIGH = Peak output high value *CYCLE = Duty cycle *RISE = Rise time *FALL = Fall time *C1 = Input control voltage point 1 *C2 = Input control voltage point 2 *C3 = Input control voltage point 3 *C4 = Input control voltage point 4 *C5 = Input control voltage point 5 *F1 = Output frequency point 1 *F2 = Output frequency point 2 *F3 = Output frequency point 3 *F4 = Output frequency point 4 *F5 = Output frequency point 5 * Connections: * In+ * | In- * | | Out+ * | | | Out- * | | | | .SUBCKT SQRVCO 1 2 3 4 PARAMS: C1=0 C2=1 C3=2 C4=3 C5=4 F1=0 F2=1k + F3=2k F4=3k F5=4k LOW=0 HIGH=5 CYCLE=0.5 RISE=1u FALL=1u A1 %vd(1,2) %vd(3,4) ASQRVCO .MODEL ASQRVCO square(cntl_array=[{C1} {C2} {C3} {C4} {C5}] + freq_array=[{F1} {F2} {F3} {F4} {F5}] out_low={LOW} + out_high={HIGH} duty_cycle={CYCLE} rise_time={RISE} fall_time={FALL}) .ENDS SQRVCO The error is: Too few nodes: A1 %vd(1,2) %vd(3,4) ASQRVCO What I am doing wrong? Thank you.

Hello, The problem: Moving .asc schematics with Autogenerated symbols between different computers stops them working. The .lib files are not in the same path and can not be located It appears the symbol files store an absolute patch for the .lib file but this path depends on the computer username and the LTXSpice installation. I tried to convert them to relative paths manually by could not get that to work. What would be the correct way to fix this problem? Best regards Bernt

Hi, I'm not sure if it is already known, and it is definitely not mentioned in the "Undocumented LTspice" Wiki page: I have a 8x8 matrix of signals and wanted to split off a bus by column. signal[0],signal[8]...signal[56] As a wild stab in the dark, I tried signal[0:63:8] to add a "stride" to the matrix notation. And it worked! The dialog box prompt is correct: "signal[0:63:8]" is a the name of a BUS with 8 conductors: signal[0], signal[8], signal[16], signal[24], signal[32], signal[40],signal[48], and signal[56]. Is this what you want? Is there anyone that has edit permissions and would like to add this to the wiki? Kind regards, Hendrik

Hi there! I'm a newbie to LTspice and I need to create a symbol for a common mode choke that represents a real part - Wurth 7448021230. They have a spice model of the part, but it is for PSpice, it is not formatted for LTspice. I've watched a few videos on creating symbols, but none of the videos match my LTspice menus - I'm using a version I just downloaded from Analog Devices. Thanks, Robert

Hello, In the second circuit of my LTspice schematic (Parallel_gains_R.asc) RLout_c gives the following error: Unknown parameter "*r". I suspect the problem is that I used the variable "R" twice in the formula. The "R's" I use refer to the same variable. When I used just one "R" in the past, this problem did not occur. Can someone help me find a solution to simulate it with the formula that consists of two "R's"? I would be very grateful as this is the final result I need to finish my master's thesis (that is due next week). Please see the files in the folder: https://groups.io/g/LTspice/files/Temp/Parallel_gains_R.zip Elien

Maybe i found a bug, or what am i doing wrong? .asc is uploaded LTspice 24.0.9 for Windows Circuit: * C:\users\alzie\My Documents\LTspice\Ori\PecoFerd2.asc Start Time: Tue May 14 08:01:13 2024 Error on line 4 : s1 n003 n002 n001 0 sw(ron=1k0 roff=10meg vt=1.65 vh=100m lser=1u vser=0) Unable to find definition of model "sw" solver = Normal Maximum thread count: 8 tnom = 27 temp = 27 method = modified trap .OP point found by inspection. Total elapsed time: 2.341 seconds.

Hello, I am using a voltage set to SINE(0 1u 50) which is 1uV 50Hz. Using transient analysis .tran 100m It does not work. It just outputs / simulates to a straight line sloping from 1nV to -500nV over 100ms I was sure this did work just yesterday and I got a sine wave as expected. I suspect it stopped working earlier today after I did an AC analysis. I have since restarted LTSpice and done a whole new schematic. Same problem. It does work for bigger amplitudes such as 1V. Is it supposed to work? Best regards Bernt

There seems to be no model of any multiplying DACs on LTSpice, has anyone found a close alternative that they could share? Thanks in advance

I just want to alert everyone that didn't know Mike Engelhardt did an interview earlier this month. You can watch it on youtube here.

Hello,In spice world we have 18 levels of spice models. The attached photo is the parameters which are shown from the attached document. How do i properly create a LTSPICE model with these parameters? Thanks. https://www.vishay.com/docs/75030/sq3426ev_ps_reva.pdf https://groups.io/g/LTspice/photo/294810/3780121?p=Created%2C%2C%2C20%2C2%2C0%2C0

Hi Team, I am simulating a 2A battery charger IC, LT3650-8.4 and have measured the current through L1, R1 and capacitor C3.| C3 is used as a battery pack. The average and RMS currents through R1 and L1 are identical. However, the current into capacitor C3 has peaks at levels up to 10A. For that reason I like to ask if anyone has used a different Model for a battery rather than simply a capacitor. If so, please share the Model. I will upload the schematic in temp folder. Thanks, Ray K.

Hello, In the folder below in the LTSPICE file and photo,I have tried to measure the output impedance of a model that Tony Casey built in the post shown below of the 74ABT04. Did I measured the output impedance correctly in the plot and LTSPICE file i posted? Thanks. 74ABT04_Test_impdance https://groups.io/g/LTspice/files/Temp https://groups.io/g/LTspice/photo/294810/3781409?p=Created%2C%2C%2C20%2C2%2C0%2C0 https://groups.io/g/LTspice/files/Temp/74ABT04_Test.zip

Hello,I want to import the model at the attached link into LTSPICE.I have opened the spice section of the abt folder as shown below and the CIR file in LTSPICE. Then i opened a cir file as shown below.I tried to do right click on the name but its not generating model. How to import properly the model into LTSPICE? Thanks. https://www.nexperia.com/products/a...rs-transceivers/inverters/series/74ABT04.html

I created a symbol with TI's spice model, but the result doesn't match TINA's. Never detect the peak current from the 1ohm Rsense...I've uploaded to the Temp folder. Thanks for the help.

I have several diode models that are described as subcircuits, I thought I could just refer to the name of the subcircuit to load it as a diode model, but from what I saw it only accepts models defined with the .model directive, not accepting those defined with . subckt, how to resolve this situation? example: *SRC=1N4728A;DI_1N4728A;Diodes;Zener <=10V; 3.30V 1.00W Diodes Inc. Zener *SYM=HZEN .SUBCKT DI_1N4728A 1 2 * Terminals A K D1 1 2 DF DZ 3 1 DR VZ 2 3 0.972 .MODEL DF D ( IS=125p RS=0.620 N=1.10 + CJO=364p VJ=0.750 M=0.330 TT=50.1n ) .MODEL DR D ( IS=25.0f RS=1.24 N=3.00 ) .ENDS site: https://github.com/kicad-spice-library/KiCad-Spice-Library/blob/master/Models/Diode/zener.lib -- Carlos Delfino