BOOSTING POWER CIRCUIT, LIQUID CRYSTAL DISPLAY DEVICE, AND PORTABLE ELECTRONIC EQUIPMENT

摘要

A boosting power circuit, wherein an external power voltage is used as a reference voltage for charging the boosting power circuit formed of a charging pump, a voltage boosted by the charging pump is output as a liquid crystal drive voltage by using the reference voltage generated in a reference voltage generating circuit formed of a differential amplifier at the time of boosting, and a voltage obtained by resistively dividing an output voltage from the charging pump is allowed to feed back to the input terminal of the differential amplifier in the reference voltage generating circuit.