公开(公告)号：KR20100040581A

公开(公告)日：2010-04-20

申请号：KR20080099779

申请日：2008-10-10

Applicant: KOREA ELECTRONICS TELECOMM ,  IUCF HYU

Inventor： ROH HYUNG DONG ,  KIM HYOUNG JOONG ,  ROH JEONG JIN ,  KIM YI GYEONG ,  KWON JONG KEE

IPC: H03F3/70 ,  H03H19/00

CPC classification number: H03H19/004

Abstract: PURPOSE: A switched capacitor circuit with a reduced leakage current is provided to improve the performance of ADC, DAC, and an analog filter by removing an output error through minimum voltage drop at amplification mode. CONSTITUTION: A first and second MOS transistor(M1,M2) output an input voltage of a first node to a second node in response to the first signal. A sampling capacitor is connected to the second Node. A third MOS transistor(M3) interlinks the other side of the sampling capacitor to the ground in response to the first signal to the ground terminal. A fourth MOS transistor(M4) interlinks one side of the sampling capacitor to the ground in response to the second signal. An operational amplifier(OP) comprises a feedback capacitor connected between a sub input terminal and output terminal. The circuit for reducing leakage current(210) blocks the leakage current in response to the first signal.

Abstract translation: 目的：提供具有减小的漏电流的开关电容电路，以通过在放大模式下的最小电压降去除输出误差来提高ADC，DAC和模拟滤波器的性能。 构成：响应于第一信号，第一和第二MOS晶体管（M1，M2）将第一节点的输入电压输出到第二节点。 采样电容器连接到第二个节点。 第三MOS晶体管（M3）响应于到接地端子的第一信号将采样电容器的另一侧与地相互连接。 第四MOS晶体管（M4）响应于第二信号将采样电容器的一侧互连到地。 运算放大器（OP）包括连接在子输入端子和输出端子之间的反馈电容器。 用于减少泄漏电流（210）的电路响应于第一信号阻断漏电流。