公开(公告)号：US09742428B2

公开(公告)日：2017-08-22

申请号：US15097715

申请日：2016-04-13

Applicant: Samsung Electronics Co., Ltd.

Inventor： Mooyeol Choi ,  Hyungdong Roh ,  Bai-Sun Kong ,  Sunwoo Kwon ,  Myung-Jin Lee

IPC: G06F17/00 ,  H03M3/00 ,  G06F3/16

CPC classification number: H03M3/422 ,  G06F3/162 ,  H03M1/464 ,  H03M3/372 ,  H03M3/50

Abstract: A delta-sigma modulator includes a loop filter, a quantizer configured to change an analog output signal into a digital signal, and a digital-to-analog converter configured to receive the digital signal and including a first capacitor and a second capacitor. In a first sampling period, the first capacitor is discharged, and at the same time, the second capacitor is charged with a reference voltage. In a second sampling period, the digital signal includes noise caused by a clock jitter, the first capacitor is charged with a reference voltage, and the second capacitor is discharged and generates a charge corresponding to the noise. In a next first sampling period, the first capacitor is discharged, and at the same time, the second capacitor generates a noise current corresponding to the noise using the charge and is charged with a reference voltage.

公开(公告)号：US20170019123A1

公开(公告)日：2017-01-19

申请号：US15097715

申请日：2016-04-13

Applicant: Samsung Electronics Co., Ltd.

Inventor： Mooyeol Choi ,  Hyungdong Roh ,  Bai-Sun Kong ,  Sunwoo Kwon ,  Myung-Jin Lee

IPC: H03M3/00 ,  G06F3/16

CPC classification number: H03M3/422 ,  G06F3/162 ,  H03M1/464 ,  H03M3/372 ,  H03M3/50

Abstract: A delta-sigma modulator includes a loop filter, a quantizer configured to change an analog output signal into a digital signal, and a digital-to-analog converter configured to receive the digital signal and including a first capacitor and a second capacitor. In a first sampling period, the first capacitor is discharged, and at the same time, the second capacitor is charged with a reference voltage. In a second sampling period, the digital signal includes noise caused by a clock jitter, the first capacitor is charged with a reference voltage, and the second capacitor is discharged and generates a charge corresponding to the noise. In a next first sampling period, the first capacitor is discharged, and at the same time, the second capacitor generates a noise current corresponding to the noise using the charge and is charged with a reference voltage.

Abstract translation: Δ-Σ调制器包括环路滤波器，被配置为将模拟输出信号改变为数字信号的量化器，以及被配置为接收数字信号并包括第一电容器和第二电容器的数/模转换器。 在第一采样周期中，第一电容器被放电，同时第二电容器被充以基准电压。 在第二采样周期中，数字信号包括由时钟抖动引起的噪声，第一电容器用参考电压充电，并且第二电容器被放电并产生对应于噪声的电荷。 在接下来的第一采样周期中，第一电容器被放电，并且同时第二电容器使用电荷产生与噪声相对应的噪声电流并且对基准电压进行充电。