In a Non-Inverting Schmitt Trigger circuit, the reference voltage (Vref) can be determined using the voltage divider formula. The voltage divider consists of R1 and R2.
Vref = VS * (R2 / (R1 + R2))
= 10 * (100000 / (20000 + 100000))
= 10 * (100000 / 120000)
= 10 * 0.8333
= 8.333 V
The upper threshold voltage (Vutp) of the Schmitt trigger circuit is the voltage at which the output switches from high to low. It can be calculated by adding Vref to the positive threshold voltage (Vt+).
Vutp = Vref + Vt+
= 8.333 + (1/3) * (10 - 8.333)
= 8.333 + (1/3) * 1.667
= 8.333 + 0.5556
= 8.888 V
The lower threshold voltage (Vltp) of the Schmitt trigger circuit is the voltage at which the output switches from low to high. It can be calculated by subtracting the positive threshold voltage (Vt+) from Vref.
Vltp = Vref - Vt+
= 8.333 - (1/3) * (10 - 8.333)
= 8.333 - (1/3) * 1.667
= 8.333 - 0.5556
= 7.777 V
Therefore, the Vref is 8.333 V, the Vutp is 8.888 V, and the Vltp is 7.777 V.
In a Non-Inverting Schmitt Trigger, Find the Vref, Vutp, Vltp.
±VS = ±10 V, R1 = 20 kΩ and R2=100 kΩ
1 answer
1 answer