| 摘要 |
PROBLEM TO BE SOLVED: To reduce the fluctuation of an output voltage in a non-sampling period even if a load capacity is large, in a sampling-driven constant voltage generation circuit. SOLUTION: This constant voltage generation circuit includes: a differential amplifying circuit to which a supply voltage is supplied from first and second power supply potential through first and second switch circuits, and from which an output signal is output; a third switch circuit having a first terminal connected to an output terminal of the differential amplifying circuit; a first capacitor connected between a second terminal of the third switch circuit and the second power supply potential; an amplifying circuit for amplifying an output signal supplied from the second terminal of the third switch circuit and supplying it to an output node during the on-state of the third switch circuit, and amplifying potential held by the first capacitor and supplying it to the output node during the off-state of the third switch circuit; and a second capacitor connected between the output node and the output terminal of the differential amplifying circuit. COPYRIGHT: (C)2011,JPO&INPIT
|
