公开(公告)号：KR20120012051A

公开(公告)日：2012-02-09

申请号：KR20100073922

申请日：2010-07-30

Applicant: KOREA ELECTRONICS TECHNOLOGY

Inventor： KIM JIN SUP ,  LIM TAE HO

IPC: H03M1/66

CPC classification number: H03M1/66 ,  H03M1/002 ,  H03M2201/6107 ,  H03M2201/8152 ,  H03M2201/932

Abstract: PURPOSE: A WCDAC(Weighted Capacitor Digital-To-Analog Converter) using a charge sharing technique is provided to ensure a reduced chip area by reducing the size of a capacitor at the time of design of the WCDAC. CONSTITUTION: A WCDAC comprises an electric charge-non sharing charge unit(110), an electric charge-sharing charge unit(120), and an output unit(130). The electric charge-non sharing charge unit converts upper bits of digital data into analogue data. The electric charge-sharing charge unit is charged with electric charges corresponding to the data amount of the upper bits for the digital-to-analogue conversion. The electric charge-non sharing charge unit outputs the charged electric charges to the output unit. The electric charge-sharing charge unit converts lower bits of the digital data into analogue data. The output unit outputs the analog signal corresponding to the digital data based on the electric charges outputted the electric charge-non sharing charge unit.

Abstract translation: 目的：提供使用电荷共享技术的WCDAC（加权电容数模转换器），以通过在设计WCDAC时减小电容器的尺寸来确保减小的芯片面积。 构成：WCDAC包括电荷非共享充电单元（110），电荷共享充电单元（120）和输出单元（130）。 电荷非共享充电单元将高位数字数据转换为模拟数据。 电荷共享充电单元对与数字到模拟转换的高位的数据量相对应的电荷充电。 电荷非共享充电单元将充电的电荷输出到输出单元。 电荷共享充电单元将数字数据的低位转换为模拟数据。 输出单元基于输出电荷非共享费用单元的电荷输出与数字数据对应的模拟信号。