公开(公告)号：KR1020080107829A

公开(公告)日：2008-12-11

申请号：KR1020070056120

申请日：2007-06-08

Applicant: 재단법인서울대학교산학협력재단 ,  주식회사 시너칩

Inventor： 김수환 ,  정덕균 ,  우종관 ,  신동용 ,  최원준

IPC: H03M1/66

CPC classification number: H03M1/662 ,  H03M2201/16 ,  H03M2201/311 ,  H03M2201/3157 ,  H03M2201/62

Abstract: A segmented digital to analog converter is provided to perform the miniaturization by reducing the number of the switches used in a coarse digital to analog converter. A segmented DAC(Digital to Analog Converter)(100) includes a first digital to analog converter, and a second digital-to-analog converter. The first digital to analog converter includes a first output terminal and a second output terminal. The first output terminal outputs a first coarse voltage. The second output terminal outputs a second coarse voltage. The second digital to analog converter outputs a minute voltage obtained by interpolating the first coarse voltage and the second coarse voltage. The first digital to analog converter includes a register string(110), and a first switch unit(120). The register string includes a plurality of resisters which are serially connected. The register string outputs a plurality of reference voltages. The first switch unit outputs two consecutive reference voltages selected among the plurality of the reference voltages as the first and second coarse voltages. The first coarse voltage is selected among odd-number reference voltages among the plurality of reference voltages. The second coarse voltage is selected among even-number reference voltages among the plurality of reference voltages.

Abstract translation: 提供分段数模转换器以通过减少粗略数模转换器中使用的开关数量来执行小型化。 分段DAC（数模转换器）（100）包括第一数模转换器和第二数/模转换器。 第一数模转换器包括第一输出端和第二输出端。 第一输出端输出第一粗电压。 第二输出端输出第二粗电压。 第二数模转换器输出通过内插第一粗电压和第二粗电压而获得的微小电压。 第一数模转换器包括寄存器串（110）和第一开关单元（120）。 寄存器串包括串联连接的多个电阻。 寄存器串输出多个参考电压。 第一开关单元输出在多个参考电压中选择的两个连续的参考电压作为第一和第二粗略电压。 第一粗略电压在多个参考电压中的奇数参考电压中选择。 第二粗电压在多个参考电压中的偶数参考电压中选择。