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Welcome to this video tutorial for TINA-TI, the free [INAUDIBLE] simulator for Texas Instruments. In this video, we're going to take a closer look at sources and how to configure them. To begin, let's open a simple voltage divider circuit.

We have two resistors, both valued at one kiloohm, and an input source, Vin, and a voltage monitoring pin, Vout. Let's take a closer look at the source. Simply double click on the source, and the voltage generator window appears. Clicking on the signal line, you can click on the ellipsis to reveal all of the different source types that are available.

We have pulse sources. We have unit step sources. We have sinusoidal sources, cosinusoidal sources, square waves, triangle waves, a generalized wave form, a PWL input, as well as the import WAV file. In this case, a sinusoidal waveform has been set up with 1 volt amplitude at 10 kilohertz.

Let's take a look at the transient response of the circuit. The transient response of the circuit is as we would expect, with the sinusoidal source driving and the voltage divider. Let's change the source and rerun the simulation. In this case, I'm going to select the generalized waveform. It's set up right now as a trapezoidal wave form. I'm going to keep that shape, but I'm going to change the values from 1 micro to 100 micro for each of the different time segments. Since there are 6 segments, we must update all six.

Clicking OK. Now you'll notice that the general waveform is in the signal path. Click OK again. Let's run the simulation.

We now have the trapezoidal wave form as our input. And the response out of the output is the same with the voltage divider. One of the nice features in TINA-TI is the PWL waveform. Let's take a look at that.

For a PWL waveform, you can simply enter points here as time value pairs. Or you can load them from a file. In this example, I'm going to load them from a file.

It takes a little while for this file to load because it's 6 megabytes long. You click the Test button, and it will show you the wave form that is being created by this particular file. In this case, it's actually the phase node of a switch-mode power supply. You click OK. You'll notice that piecewise linear is now the type of signal we're going to use. And now let's take a look at simulation.

You'll notice it takes a little bit longer than the other ones did because of the multiple points that have been applied. However, the results are the same. If I separate the curve, you can see that the input waveform here is reduced, once again, in half of magnitude from the voltage divider. This can be very helpful if you're doing some advanced prototyping.

Say, for example, you have a circuit that you don't have any simulation information for, but you have the output waveforms for that circuit. If you need to design the second stage of the circuit, you can simply take the output stimulus into your second stage of the circuit and use it as a source. This helps for rapid prototyping.

The last waveform that's available is the WAV file. I'll open a different example for that. We have several sources in this particular example. One of them is a modulation waveform. The other is the actual WAV file. Let's take a look at that source. The signal is denoted by WAV file. And it's loaded from a location on your computer where you have the WAV file stored.

Let's go ahead and run a transient analysis on this. This circuit will run for five seconds. We now have wave forms that are available. This is the initial input wave form. This is the output from the speaker. And this is the modulating waveform.

The nice thing about TINA-TI is it allows you to actually play these waveforms on your speaker. Simply click on the WAV form. Press the green arrow for play sound.

[MUSIC PLAYING]

And you can hear the original signal. Let's hear what the signal sounds like after it's modulated.

[MUSIC PLAYING]

This is a powerful instrument for using sound files and post-processing the sound files. This would be a very important tool for people doing audio production. During this video, we've taken a closer look at the sources and the multiple signal types that are available in TINA-TI. We've shown examples of sinusoid, general waveform, PWL, and WAV file inputs. Thanks for your attention.