Absolute-value detectors Comparators can be used to create absolute-value detectors. In an absolute-value detector, two comparators and a digital logic gate are used to compare the absolute values of two voltages. See also Constant fraction discriminator Digital comparator Flash ADC Sorting network Zero crossing threshold detector References External links IC Comparator reference page at http://circuitous.ca A Java based resistor value search tool for analysing an inverting comparator circuit with hysteresis Electronic circuits Comparison (mathematical)