HYSTERESIS COMPARATOR, SEMICONDUCTOR DEVICE, AND STORAGE BATTERY DEVICE

摘要

Provided is a hysteresis comparator having a small circuit area and exhibiting a low power consumption. The hysteresis comparator comprises a comparator, a switch, a first capacitor, a second capacitor and a logic circuit, wherein a first terminal of the switch is electrically connected to one of a pair of conductive regions of the first capacitor, to one of a pair of conductive regions of the second capacitor, and to a first input terminal of the comparator. The output terminal of the comparator is electrically connected to an input terminal of the logic circuit. The output terminal of the logic circuit is electrically connected to the other of the pair of conductive regions of the second capacitor. The logic circuit has a function to generate an inverted signal of a signal input to the input terminal of the logic circuit and to output the inverted signal at the output terminal of the logic circuit. A reference potential is input to the first input terminal of the comparator and the reference potential is held by means of the switch. The potential at the output terminal of the comparator varies, which causes the reference potential to change due to the capacitive coupling of the second capacitor.