Basics of electronic ...

Exercise 1:

Build a system to measure the offset voltage of the LM741 amplifier by setting the gain x1000. Use the files from the https://study.engined.eu/mod/folder/view.php?id=738 folder as a model. Assume the power supply voltage of the amplifier \( \pm 15V\) and \(R_1=R_3=100 \Omega \) and \(R_2=100 k\Omega \). When you're done, compare the result with the video.

Exercise 2:

Build a circuit to measure the input bias currents and the input offset current. Measure the currents and compare with the LM741 amplifier data sheet. When you're done, compare the result with the video.

Exercise 3:

Make an inverting amplifier circuit based on the LM741 amplifier for three different gains:

• \(k_u\)=10, \(R_1=10k\Omega\), \(R_3=9.1k\Omega\), \(R_2=100k\Omega\),
• \(k_u\)=100, \(R_1=1k\Omega\), \(R_3=1k\Omega\), \(R_2=100k\Omega\),
•  \(k_u\)=1000, \(R_1=100 \Omega\), \(R_3=100 \Omega\), \(R_2=100k\Omega\)

and perform ac simulations, i.e. determine the Bode characteristic on one graph for three gains. Mark the open-loop gain \(10^5\) on the graph and extrapolate the line that coincides with the slope of the characteristic. Read the cutoff frequency. When you're done, compare the result with the video.

Exercise 4:

Watch the video showing the internal structure of the LM741 amplifier: