June 2023 StudentZone Quiz Solution

Question 1:

For the circuit presented in figure 1 express V_REF(LOW) and V_REF(HIGH) as equations depending on R₁, R₂, R₃ and W2. What is the ration between V_REF(HIGH) and V_REF(LOW) if all resistances are equal?

Answer 1:

The V_REF(LOW) and V_REF(HIGH) can be expressed as follows:

Considering that the resistances are equal R₁ = R₂ = R₃ we can define the ratio between V_REF(HIGH) and V_REF(LOW) as follows: