A window comparator has two reference voltages and its output changes (goes H in the following configuration example) if the input signal is within these two reference voltages.
An example of a configuration where single-power comparator with an open-collector type output is used and the operation of the comparator are explained below.
The following table shows how the output signal (VO) changes depending on the input signal (VI).
|*:||The output of the comparator is an open-collector type, so the comparator output is made high by using an external resistor (R) if the output transistor is off, as shown below.|
|**:||In the above example, the two outputs of the comparators are connected by the wired-OR method. If both outputs of the comparators are high, then VO goes high. If either of the outputs is low, VO goes low.|
The relationship between the input signal (VI) and output signal (VO) is as shown below.