D10 - Op Amps 1

We started class with OP Amps. Op amps behave like a voltage controlled voltage source. Op amps come in packages. The DIP type is the one we work with with the number going 1 to 8 counter clockwise. We were asked to draw the difference in a open and close loop Op amp.

White Board work showing our interpretation of open loop and close loop Op amps.

We then move onto an example of an inverting Op amp. We were asked to find the gain when Vs = 2 V.

White Board work, First we drew the equivalent circuit and then used gain  = Vout/Vs.

Matlab work of the White Board example. Used node voltage and matrix math. Gain came out to be -2

More White board work, that was used in Matlab.

We then tried another example. To find gain, Io and Vs = 1 V.

White Board work, drew equilavent circuit, and used node voltage.

Matlab work of the White Board work.

We then moved onto the lab of the day:
Inverting Voltage Amplifier

Pre lab schematic of the lab. And was also used for the last part of the day.

Picture of the Op amp. R being 1k each.

Voltage data from -3v to 4v note that points when its sat after 2 V.

Matlab Work of the lab. We find the linear region, note the point after 2 volts the Op amps starts to saturates. Also note that it starts negative since it is an inverting Op amp.

More MatLab work done, intputting date for the graphs used,

More Matlab work this one shows the values of the resisters and v outs.

Extra white board work to show a better picture but turned out crappy.

In summary of our class today was focuses on the OP amp and how useful this piece of technologist change the world. We end the class with another Ideal Op example and to find Vo/Vs is just to use the formula Vout = -R2/R1*vs so with a little algebra Vo/Vs  = R2/R1 for an inverting amplifier.