Week 6 Day 10 Amps

Today we began learning about Op Amps.  We learned what an open circuit and a closed circuit is.  Open circuit doesn't give feedback and closed does.

In this example we redrew a circuit with an op amp in terms of a voltage source and resistors in series.  Then we used node voltage to find v1 which is Vd and v2.  Then we used the ratio vout/vin=gain to find the voltage gain.

Another example of finding gain.

We designed a circuit with a gain of 2 volts.  Using the schematic for the OP 27 we found the output resistance for the open loop to be 70 ohms. We found the input voltage to be -1.1v and output voltage to be -2v.

We then tested the circuit with the analog discovery ranging from -3v to 4v to plot the inverse.