A circuit is a non-inverting comparator, How would the output change, if we replace the Zener diode with a new one with a breakdown voltage of 3V?
a) The output voltage will have a lower duty cycle.
b) The output voltage will be zero.
c) The output voltage will have a higher duty cycle.
d) The duty cycle of the output voltage will be 50%.
c) The output voltage will have a higher duty cycle.
What is the advantage of using comparators with hysteresis?
a) Setting the voltage gain
b) Decrease the power dissipation
c) Eliminating the effect of noise
d) Limiting the output amplitude
c) Eliminating the effect of noise
Inverting Schmitt Trigger, the supply voltage is ± 12V. Suppose VIN = +3 V, the output voltage will be:
R1 = 10kΩ
R2 = 10kΩ
a) +7v
b) -10v
c) +5v
d) +10v
To determine the output voltage of the inverting Schmitt Trigger, we need to consider the voltage divider created by resistors R1 and R2.
The output voltage is given by the equation:
Vout = -Vin * (R2 / R1)
Given that Vin = +3V, R1 = 10kΩ, and R2 = 10kΩ, we can substitute these values into the equation to calculate the output voltage:
Vout = -3V * (10kΩ / 10kΩ)
Vout = -3V * 1
Vout = -3V
Therefore, the output voltage will be -3V.
So, the correct answer is:
b) -3v
If the Zener diode in a non-inverting comparator circuit is replaced with a new one with a breakdown voltage of 3V, the correct answer would be:
a) The output voltage will have a lower duty cycle.
Explanation: In a non-inverting comparator circuit, the Zener diode is typically used to provide a reference voltage. By replacing the Zener diode with a new one with a lower breakdown voltage (in this case, 3V compared to the previous value), the reference voltage in the circuit will also decrease. As a result, the input voltage required to trigger a change in the output will also decrease. This will cause the output voltage to have a lower duty cycle, meaning it will be high for a shorter period of time compared to the original circuit.
To answer this question, let's first understand the behavior of a non-inverting comparator circuit.
In a non-inverting comparator circuit, the input voltage is compared with a reference voltage. The output of the circuit switches between two voltage levels based on the comparison result. When the input voltage is higher than the reference voltage, the output is at a higher voltage level (usually the supply voltage). Conversely, when the input voltage is lower than the reference voltage, the output is at a lower voltage level (usually ground or zero voltage).
Now, let's consider the role of the Zener diode in this circuit. The Zener diode is typically used in the feedback path of a non-inverting comparator to limit the output voltage swing. It ensures that the output voltage does not exceed the breakdown voltage of the Zener diode.
In this particular scenario, we are replacing the Zener diode with a new one having a breakdown voltage of 3V. Since the breakdown voltage determines the maximum voltage that can be applied across the diode, replacing the Zener diode with a different breakdown voltage affects the output behavior.
If the breakdown voltage of the new Zener diode is lower than the reference voltage, it will not limit the output voltage swing. Consequently, the output voltage will follow the input voltage and will be the same as the supply voltage when the reference voltage is exceeded.
Based on this information, we can conclude that the correct answer to the question is:
a) The output voltage will have a lower duty cycle.
Explanation: The duty cycle of a signal refers to the percentage of time the signal spends in a high or low state within a complete cycle. In this case, since the output voltage will be the same as the supply voltage when the reference voltage is exceeded, the output will spend more time in the high state compared to the low state. This results in a lower duty cycle, as the signal spends a greater percentage of time in the high state.