Patent ID: 7005838
Filing Date: 2006-02-28
Classification: H02M

Abstract:
1. Voltage generation circuitry comprising: a differential amplifier having a first input and a second input; an internal voltage generation circuit selectively activated according to at least an output signal of said differential amplifier and generating, when activated, an internal voltage in accordance with charge pump operation of a capacitance element; a compensation capacitance element connected to the first input of said differential amplifier; a first switch circuit selectively transmitting one of a reference voltage and a comparative voltage corresponding to said internal voltage to the second input of said differential amplifier circuit; and a second switch circuit for connecting, when conductive, an output of said differential amplifier circuit and said first input together, said first switch circuit selecting and supplying said reference voltage to the second input of said differential amplifier when said second switch circuit is conductive, and said second switch circuit being rendered non-conductive when said first switch circuit selects the comparative voltage.