### Author Topic: LTspice Lesson 4: Generate Waveforms used in Electric Circuits  (Read 2143 times)

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#### Kashif

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##### LTspice Lesson 4: Generate Waveforms used in Electric Circuits
« on: December 05, 2019, 07:22:14 am »

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#### Kashif

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##### Re: LTspice Lesson 4: Generate Waveforms used in Electric Circuits
« Reply #1 on: December 10, 2019, 10:00:38 pm »
Lesson 4c is online:

LTspice Lesson 4c discussed creating a waveform using a handful of discrete points, but by using PWL FILE as shown below, large number of points can be easily imported into LTspice simulator to generate more sophisticated waveforms. In this lesson, we will create a practical system level ESD stimulus waveform as specified in IEC61000_4_2. Data points will created from an equation in IEC61000_4_2 standard using a Matlab script (download at the end if you interested).

https://iexploresiliconvalley.com/2019/12/10/ltspice-lesson-4d-generate-waveforms-used-in-electric-circuits-pwl-file/

#### rstofer

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##### Re: LTspice Lesson 4: Generate Waveforms used in Electric Circuits
« Reply #2 on: December 10, 2019, 11:08:52 pm »
My grandson is scheduled to take a circuit analysis course next semester even though he is in the ME program.  I am certain that your tutorials will be of great assistance.

#### Kashif

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##### Re: LTspice Lesson 4: Generate Waveforms used in Electric Circuits
« Reply #3 on: December 11, 2019, 01:42:44 am »
Thanks rstofer!

Yes these tutorials are meant for EE students or any one involve in electronic who is not afraid of diving deep into math, although math can be omitted if your goal to get some experience with simulation.

#### rstofer

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##### Re: LTspice Lesson 4: Generate Waveforms used in Electric Circuits
« Reply #4 on: December 12, 2019, 11:42:12 pm »
Thanks rstofer!

Yes these tutorials are meant for EE students or any one involve in electronic who is not afraid of diving deep into math, although math can be omitted if your goal to get some experience with simulation.

The math thing isn't a big deal for either of us.  He is finishing his Differential Equations class this week.  The university he is attending offers MATLAB as a required course early in the program.  They use it for all of the classes.  I'm a little rusty...

I'm not sure where his circuits course will go.  After all, it's an ME program, not EE.  Nevertheless, circuits gets us to Laplace and Laplace gets us to Control Systems and every ME better know Controls.

#### Kashif

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##### Re: LTspice Lesson 4: Generate Waveforms used in Electric Circuits
« Reply #5 on: December 16, 2019, 06:52:51 pm »
Another one in this series posted now

LTspice provide a built in exponential waveform generator. This can be very helpful to generate arbitrary exponential pulses to simulate special systems such as surge protector or ESD modeling. In this lesson, we will understand all the parameters that are involved to setup such a waveform. There are some undocumented commands that can useful when a burst of signal need to be created...

https://iexploresiliconvalley.com/2019/12/16/ltspice-lesson-4e-generate-waveforms-used-in-electric-circuits-exponential/

Smf