公开(公告)号：US09735797B2

公开(公告)日：2017-08-15

申请号：US15360349

申请日：2016-11-23

申请人： ANALOG DEVICES, INC.

发明人： Jialin Zhao ,  Qingdong Meng ,  Yunzhi Dong ,  Jose Barreiro Silva

IPC分类号： H03M1/00 ,  H03M1/10 ,  H03M1/46 ,  H03M3/00

CPC分类号： H03M1/1071 ,  H03M1/1038 ,  H03M1/16 ,  H03M1/38 ,  H03M1/46 ,  H03M3/412 ,  H03M3/464

摘要： For analog-to-digital converters (ADCs) which utilize a feedback digital-to-analog converter (DAC) for conversion, the final analog output can be affected or distorted by errors of the feedback DAC. A digital measurement technique can be implemented to determine timing mismatch error for the feedback DAC in a continuous-time delta-sigma modulator (CTDSM) or in a continuous-time pipeline modulator. The methodology utilizes cross-correlation of each DAC unit elements (UEs) output to the entire modulator output to measure its timing mismatch error respectively. Specifically, the timing mismatch error is estimated using a ratio based on a peak value and a value for the next tap in the cross-correlation function. The obtained errors can be stored in a look-up table and fully corrected in digital domain or analog domain.

公开(公告)号：US09716509B2

公开(公告)日：2017-07-25

申请号：US15360617

申请日：2016-11-23

申请人： Analog Devices, Inc.

发明人： Jialin Zhao

IPC分类号： H03M1/10 ,  H03M3/00 ,  H03M1/12

CPC分类号： H03M1/1071 ,  H03M1/1038 ,  H03M1/1057 ,  H03M1/1245 ,  H03M1/167 ,  H03M1/46 ,  H03M1/74 ,  H03M3/378 ,  H03M3/422 ,  H03M3/464

摘要： For analog-to-digital converters (ADCs) which utilize a feedback digital-to-analog converter (DAC) for conversion, the final analog output can be affected or distorted by errors of the feedback DAC. A digital measurement technique can be implemented to determine switching mismatch error for the feedback DAC in a continuous-time delta-sigma modulator (CTDSM) or in a continuous-time pipeline modulator. The methodology forces each DAC unit elements (UEs) to switch a certain amount times and then use the modulator itself to measure the errors caused by those switching activities respectively. The obtained errors can be stored in a look-up table and fully corrected in digital domain or analog domain.

公开(公告)号：US20170170839A1

公开(公告)日：2017-06-15

申请号：US15360349

申请日：2016-11-23

申请人： ANALOG DEVICES, INC.

发明人： Jialin Zhao ,  Qingdong Meng ,  Yunzhi Dong ,  Jose Barreiro Silva

IPC分类号： H03M1/10 ,  H03M3/00 ,  H03M1/46

CPC分类号： H03M1/1071 ,  H03M1/1038 ,  H03M1/16 ,  H03M1/38 ,  H03M1/46 ,  H03M3/412 ,  H03M3/464

摘要： For analog-to-digital converters (ADCs) which utilize a feedback digital-to-analog converter (DAC) for conversion, the final analog output can be affected or distorted by errors of the feedback DAC. A digital measurement technique can be implemented to determine timing mismatch error for the feedback DAC in a continuous-time delta-sigma modulator (CTDSM) or in a continuous-time pipeline modulator. The methodology utilizes cross-correlation of each DAC unit elements (UEs) output to the entire modulator output to measure its timing mismatch error respectively. Specifically, the timing mismatch error is estimated using a ratio based on a peak value and a value for the next tap in the cross-correlation function. The obtained errors can be stored in a look-up table and fully corrected in digital domain or analog domain.

公开(公告)号：US09231614B2

公开(公告)日：2016-01-05

申请号：US14298459

申请日：2014-06-06

申请人： ANALOG DEVICES, INC.

发明人： Jose Barreiro Silva ,  Jialin Zhao ,  Wenhua W. Yang

IPC分类号： H03M1/06 ,  H03M3/00

CPC分类号： H03M3/352 ,  H03M3/388 ,  H03M3/416 ,  H03M3/464 ,  H03M3/466

摘要： The present disclosure describes a mechanism to digitally correct for the static mismatch of the digital-to-analog converter (DAC) in at least the first-stage of a multi-stage noise shaping (MASH) analog-to-digital converter (ADC). The correction is applicable to continuous-time implementations, and is especially attractive for high-speed applications.

摘要翻译： 本公开描述了在多级噪声整形（MASH）模数转换器（ADC）的至少第一级数字校正数模转换器（DAC）的静态失配的机制， 。 该校正适用于连续时间实现，对于高速应用特别有吸引力。