Window Comparators and Null Detectors

摘要

In the early days of Hands-On Radio, one of the first experiments (#11) described comparator circuits. These are pretty handy for detecting when the voltage at one of their inputs is greater or less than at the other input I'm finally getting around to describing two variations of the comparator - the window comparator and the null detector. There are plenty of applications for these circuits in radio and for test circuits.