Using the formula given at step 1, the value of C1 and the plot presented in Figure 4, compute Scope input capacitance Cm.
The following formula is used for computing Cm, as stated in step 1 of the lab activity:
Where GHF1 represents the attenuation at high frequencies and is obtained by analyzing the plot given in Figure 4. The value obtained is around 4dB.
The value for C1 can be taken from the materials section: 39pF.
Therefore, the value of Cm is equal to:
The materials list contains two transistors that don't seem to be used.
Thank you for your remark! Indeed the transistors are not used. But if you want, you cand expand the experiments in the October StudentZone article, using transistors connected as diode and perform capacitance measurements.
This article is somehow an introduction for the articles that will come in the next months.
Thank you for your interest!