公开(公告)号：US20170317685A1

公开(公告)日：2017-11-02

申请号：US15651077

申请日：2017-07-17

Applicant: Texas Instruments Incorporated

Inventor： Amit K. Gupta ,  Peng Cao ,  Venkatesh Acharya

IPC: H03M3/00

CPC classification number: H03M3/376 ,  H03M3/344 ,  H03M3/422 ,  H03M3/452

Abstract: A delta-sigma Analog-to-Digital Converter (ADC) (IC) which includes an input feed-forward path extending from an input to the ADC to a feed-forward summing circuit disposed between a loop filter and quantizer of the ADC, and a filter disposed in the feed-forward path as an apparatus for improving distortion performance in the delta-sigma ADC. The filter may be a low pass filter, for example, a Resistor-Capacitor (RC) circuit. The filter may have a cut-off frequency outside the ADC's passband. The filtering provided may be continuous-time filtering, even if the delta-sigma ADC is a discrete-time delta-sigma ADC.

公开(公告)号：US09729165B2

公开(公告)日：2017-08-08

申请号：US15153384

申请日：2016-05-12

Applicant: Texas Instruments Incorporated

Inventor： Amit K. Gupta ,  Peng Cao ,  Venkatesh Acharya

IPC: H03M1/06 ,  H03M3/00

CPC classification number: H03M3/376 ,  H03M3/344 ,  H03M3/422 ,  H03M3/452

Abstract: A delta-sigma Analog-to-Digital Converter (ADC) (IC) which includes an input feed-forward path extending from an input to the ADC to a feed-forward summing circuit disposed between a loop filter and quantizer of the ADC, and a filter disposed in the feed-forward path as an apparatus for improving distortion performance in the delta-sigma ADC. The filter may be a low pass filter, for example, a Resistor-Capacitor (RC) circuit. The filter may have a cut-off frequency outside the ADC's passband. The filtering provided may be continuous-time filtering, even if the delta-sigma ADC is a discrete-time delta-sigma ADC.

公开(公告)号：US20160336956A1

公开(公告)日：2016-11-17

申请号：US15153384

申请日：2016-05-12

Applicant: Texas Instruments Incorporated

Inventor： Amit K. Gupta ,  Peng Cao ,  Venkatesh Acharya

IPC: H03M3/00

CPC classification number: H03M3/376 ,  H03M3/344 ,  H03M3/422 ,  H03M3/452

Abstract: A delta-sigma Analog-to-Digital Converter (ADC) (IC) which includes an input feed-forward path extending from an input to the ADC to a feed-forward summing circuit disposed between a loop filter and quantizer of the ADC, and a filter disposed in the feed-forward path as an apparatus for improving distortion performance in the delta-sigma ADC. The filter may be a low pass filter, for example, a Resistor-Capacitor (RC) circuit. The filter may have a cut-off frequency outside the ADC's passband. The filtering provided may be continuous-time filtering, even if the delta-sigma ADC is a discrete-time delta-sigma ADC.

Abstract translation: 一种Δ-Σ模数转换器（ADC），其包括从输入到ADC延伸到设置在ADC的环路滤波器和量化器之间的前馈求和电路的输入前馈路径，以及 布置在前馈路径中的滤波器作为用于改进Δ-ΣADC中的失真性能的装置。 滤波器可以是低通滤波器，例如电阻 - 电容（RC）电路。 滤波器可能在ADC通带外部具有截止频率。 所提供的滤波可以是连续时间滤波，即使Δ-ΣADC是离散时间Δ-ΣADC。