February 2020 StudentZone Quiz Solution

Question:

Compute the threshold voltages for all four comparator setups (simple, non-inverting hysteresis, inverting hysteresis) and compare the results with the ones obtained from the experimental setups.

Answer:

1.Simple Comparator (Figure 1).

The threshold voltage is determined by the input DC voltage applied (Vref).

Therefore:

2. Non-inverting hysteresis comparator (Figure 4).

The resistor values used in the setup are the following: R1 = 10kΩ, R2 = 20kΩ

We can compute the voltage thresholds as follows:

3. Inverting hysteresis comparator (Figure 8).

The resistor values used in the setup are the following: R1 = 10kΩ, R2 = 10kΩ

We can compute the voltage thresholds as follows:

4. Inverting hysteresis comparator (Figure 8).

The resistor values used in the setup are the following: R1 = 10kΩ, R2 = 10kΩ, Vref=1V.

We can compute the voltage thresholds as follows: