This is Part 2 of a series of three articles that provideLTspice®EMC and signal integrity simulation models. In “How to Get the Best Results Using LTspice for EMC Simulation—Part 1”, we provided LTspice simulation tools for power supply components, conducted emissions, an...
To create a full Bode plot, a graphical sweep of gain and phase, in LTspice for the control loop, follow these steps.Step 1: Create the AC Injection SourceIn LTspice, insert the ±10 mV AC injection voltage source and injection resistor and label nodes A, B, and C as shown i...
and we will use “bv” from the library. The current source is “bi”. B sources use a function to specify the output. There are three functions in LTspice that produce “noisy” or random numbers used as input to these sources. ...
We’ll useLTspiceto study techniques for demodulating an AM waveform. But before we demodulate we need something that is modulated. In theAM modulation page, we saw that four things are needed to generate an AM waveform. First, we need a baseband waveform and a carrier ...
I thought it would be fun to make this into a constant power load, so I used an AD633 analog multiplier IC to measure the power and create power feedback. My circuit is shown below: http://i.imgur.com/xHJYNrH.png The theory is this: ...
Forgot to add the two links: 1-June 10, 2012: Check the definition of “Security” 2-November 17, 2013, which leads me to the next comment: @Bruce, You may want to consider increasing thedose(with herbal tea, this time) – LOL (Oh, no! My days are numbered) ...
This article contains an illustrated guide on how to use LTspice® when creating your own IBIS model—from the IBIS premodeling procedure to IBIS model validation. It also contains detailed instructions on how to accurately extract I-V, V-T, ramp, and
The command line in LTspice is then set to be .noise V(VOUT) V1 dec 100 20 220. Then hold the control key and left click on the waveform name (V(ONOISE)/101). The rms noise can easily be converted to peak-to-peak noise using the equation: ...
We’ll use an LTspice implementation to help us analyze the two-op-amp current source. Here I’m using the LTspice “ideal single-pole operational amplifier.” I initially tried it with the OP-77, but the simulation didn’t run properly. There might have been an issue with the OP-77...
This thing turned out to be much more complicated than I expected. I started with a circuit that was taken directly from an old textbook of mine. The LTspice schematic was identical to the circuit in the book, even down to the part numbers used for the diode and BJT. And as far as ...