公开(公告)号：US20230318591A1

公开(公告)日：2023-10-05

申请号：US17713901

申请日：2022-04-05

Applicant: XILINX, INC.

Inventor： Bob W. VERBRUGGEN ,  Christophe ERDMANN

IPC: H03K5/14 ,  H03K5/15 ,  H03K5/135 ,  H03K19/0948 ,  H03M1/82

CPC classification number: H03K5/14 ,  H03K5/15066 ,  H03K5/135 ,  H03K19/0948 ,  H03M1/82 ,  H03K2005/00026

Abstract: Methods and apparatus for time-to-digital conversion. An example apparatus includes a first input; a second input; a delay line coupled to the first input and comprising a plurality of first delay elements coupled in series, each of the plurality of first delay elements having a first delay time; a second delay element having an input coupled to the second input and having the first delay time; a third delay element having an input coupled to the second input and having a second delay time, the second delay time being smaller than the first delay time; a first set of arbiters having first inputs coupled to the delay line and having second inputs coupled to an output of the second delay element; and a second set of arbiters having first inputs coupled to the delay line and having second inputs coupled to an output of the third delay element.

公开(公告)号：US20250105851A1

公开(公告)日：2025-03-27

申请号：US18372596

申请日：2023-09-25

Applicant: XILINX, INC.

Inventor： Roswald FRANCIS ,  Bob W. VERBRUGGEN ,  Pedro FARIA

IPC: H03M1/06

Abstract: An analog-to-digital converter (ADC) circuitry includes channels that are interleaved with each other to generate output digital signals from input analog signals. A first channel includes sub-ADC circuitry, amplitude detection circuitry, and correction circuitry. Random chopping is applied by chopping circuitry at the input of the sub-ADC circuitry while sampling. The sub-ADC circuitry outputs digital data corresponding to the chopping states. Gain mismatch within the chopping circuitry is mitigated by determining correction values via the amplitude detection circuitry and the correction circuitry and applying the correction values to the output of the sub-ADC circuitry. The amplitude detection circuitry determines an amplitude difference between data signals. The correction circuitry is coupled to the output of the amplitude detection circuitry. The correction circuitry generates the correction values based on the amplitude difference, and outputs the correction values to adjust the data signals.