July 2019 StudentZone Quiz Solution

Question 1:

Taking into consideration the Loop Gain Measurement setup described in Figure 3, which is the purpose of the R2 and R3 in the circuit?

Answer 1:

Considering the circuit in Figure below:

The purpose of R2 in the circuit is to adjust the loop gains, while R3 resistor inserted in the feedback loop is assuring the impedance matching with output impedance R4.