Discrete signal collection interface

The invention belongs to the technical field of aviation electronics, and particularly relates to a discrete signal collection interface which is composed of a signal conditioning circuit 1, an input signal selection circuit 2, a collection selection circuit 3, a first collection circuit 4, a second collection circuit 5, a dual-channel A/D converter circuit 6 and a controller circuit 7. Two standard collection circuits are designed, a controller selects one of the collection circuits through configuration information for signal collection, and the collection circuits are enabled to be applicable to two standards. An A/D converter is adopted to replace a conventional comparator for collection, so that the problem that the collection circuits cannot cover and collect all switch quantity types due to complexity in setting of a comparison threshold value and few selectable threshold values when the comparator is used for collection in the past is solved.