In the operation of two 311 voltage comparators as the voltage window detector, a low output indicates that the input is ________.

within the high and the low reference voltages

above the higher reference voltage

below the lower reference voltage

either above the higher reference voltage or below the lower reference voltage

In the operation of two 311 voltage comparators as the voltage window

1.	In the operation of two 311 voltage comparators as the voltage window detector, a low output indicates that the input is ________.
A.	above the higher reference voltage
B.	below the lower reference voltage
C.	either above the higher reference voltage or below the lower reference voltage
D.	within the high and the low reference voltages
Answer» D. within the high and the low reference voltages