VOLTAGE GENERATING CIRCUIT, REGULATOR CIRCUIT, SEMICONDUCTOR STORAGE DEVICE AND SEMICONDUCTOR DEVICE

摘要

A high voltage generating circuit includes a charge pump circuit and an output voltage control circuit. The charge pump circuit raises a voltage to a high voltage higher than a power supply voltage. The output voltage control circuit controls the voltage to make the raised high voltage to be a predetermined target voltage. The output voltage control circuit includes at least two offset free comparator circuits, or at least one offset free comparator circuit and at least one differential amplifier. The offset free comparator circuit includes a coupling capacitor, a differential amplifier and a plural switch. The coupling capacitor inputs a voltage corresponding to the high voltage. The differential amplifier compares a voltage from the coupling capacitor with a predetermined reference voltage and outputs a comparison result voltage to the charge pump circuit. The switches are connected to the differential amplifier to cancel an offset of the differential amplifier.

主权项

1. A voltage generating circuit, comprising: a charge pump circuit raising a voltage to a high voltage higher than a power supply voltage and an output voltage control circuit controlling the voltage to make the raised high voltage to be a predetermined target voltage, and the voltage generating circuit being characterized in that:
the output voltage control circuit comprises at least two offset free comparator circuits, or at least one offset free comparator circuit and at least one differential amplifier, wherein the offset free comparator circuit comprises: a coupling capacitor, inputting a voltage corresponding to the high voltage; a differential amplifier, comparing a voltage from the coupling capacitor with a predetermined reference voltage, and outputting a comparison result voltage to the charge pump circuit; and a plurality of switches, respectively connected to the differential amplifier to cancel an offset of the differential amplifier.