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It drops to 12 ppm when I replace the capacitor with a 10K resistor. A pure resistor divider should give better accuracy than that.. Cheers AG

I uploaded the file File-> Temp ->RC_meas_freq.asc

Well, try it and see! You can give whatever signals you want to, to those nodes. It is your circuit to simulate. Just don't leave them floating or LTspice will complain. My guess is that VBIAS_P

Hello Mark, You could additionally add the following options. .options gmin=1e-10 abstol=1e-10 reltol=0.003 Maybe you can send me your files if you don't want upload the files to the gr

Hello Mark, The simulation time variable is always 0 or greater 0. The following equation works without warnings. B1 VControl 0 V=2.39495e-005*if(time < 2e-009, 1.0

A netlist I have contains (apologies for the line wrap): B1 VControl 0 V=2.39495e-005 * if (0 <= time & time < 2e-009, 1.0 - exp(-time/2e-009),0.632121*exp(-(time - 2e-009)/2e-008)) This generates a

Hello Helmut - You wrote: Here is excerpt from the netlist: * ======= Simulation Options ======= * .options noopiter .options topologycheck=0 .options gminsteps=0 .options srcsteps=0 * These go a LONG

Hi I have some simulations (one I am fighting with right this second) which use the 4093 NAND. My simulation uses a part from the CD4000.lib file that is in this group. (Look here:

Hi, If there is a section in LTwiki to show examples for specific calculations, this would be a good example to be added under the title "Frequency and duty cycle". I admit that for most of us this

Hello Mark, I wonder about the sl

Hello - Last Thursday a simulation consisting of a 100 x 100 grid of resistors and capacitors was started.? I knew this was going to take a long time (transient response) and arranged for use of a

Other than that, all are fine??please confirm.. shall i give clock signal for the nodes VIN_P, VIN_N, and VBIAS_P?? please confirm. Thank you

You left unconnected signal pins. Look at nodes VIN_P, VIN_N, and VBIAS_P. Why do you have nothing connected to these pins?

I mean: .meas TRAN Frequency param 1/Period - sorry copy and paste error. Regards, Tony

Hello AG .meas TRAN Trise find time when V(out)=0 rise=3 .meas TRAN Trise2 find time when V(out)=0 rise=4 .meas TRAN Tfall find time when V(out)=0 fall=3 .meas TRAN Ton param Tfall-Trise .meas TRAN

<Snip> </snip> Hello Micheline, All of the parameters of the diode model are explained in the LTspice>Circuit Elements>Diode section of the Help. Regards, Tony

Where did you last leave it? :-)

Ian, With respect, we don't know for sure where the circuit should be grounded, as we don't know what the application is. Perhaps the rectified bit should be floating? Regards, Tony

Hi, I had tried the "Diff-amp-based delay element" simulation on ltspice but i couldn't get the results.Can anyone guide me what I did wrong while circuit design. Please find the files - I have

Hi dinesh. May help link: http://www.mosis.com/test/ There is this: IBM 0.50 micron (5HP, 5AM, 5DM, 5PA) IBM 0.35 micron (5HPE, 5PAe) IBM 0.25 micron (6HP, 6DM, 6RF) IBM 0.18 micron (7RF, 7RFSOI, 7WL,