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구분 출원국
출원년도 ~ 키워드

상세정보

등록 의사 차동 병합 커패시터 스위칭 디지털-아날로그 변환기

의사 차동 병합 커패시터 스위칭 디지털-아날로그 변환기
이미지 확대
발명자
조영균, 남재원, 권종기, 전영득
출원번호
12773768 (2010.05.04)
공개번호
20110032134 (2011.02.10)
등록번호
8059022 (2011.11.15)
출원국
미국
협약과제
초록
A digital-to-analog converter (DAC) is provided. The DAC includes a positive converter, a negative converter, and a comparator for receiving outputs of the positive converter and the negative converter, comparing the outputs with a reference voltage, and generating an output voltage. Each of the positive converter and the negative converter includes an upper-bit converter including a plurality of bit capacitors corresponding to respective upper bits, a lower-bit converter including a plurality of bit capacitors corresponding to respective lower bits, and a coupling capacitor for connecting the upper-bit converter with the lower-bit converter in series. Each of the positive converter and the negative converter receives a bias voltage to have a uniform offset when converting the respective bits. Accordingly, it is possible to obtain a high resolution using a small area. Also, the number of capacitors can be reduced, and the capacitance of a unit capacitor can be maximized. Consequently, it is possible to minimize heat noise and device mismatching.
KSP 제안 키워드
Analog Converter, Digital to Analog Converter, High-resolution, Output Voltage, Small area, bias voltage, coupling capacitor, digital-to-analog(DAC), reference voltage, unit capacitor