公开(公告)号：US20240213995A1

公开(公告)日：2024-06-27

申请号：US18088982

申请日：2022-12-27

Applicant: Xilinx, Inc.

Inventor： Bob Verbruggen ,  Christophe Erdmann

IPC: H03M1/10

CPC classification number: H03M1/1014

Abstract: Methods and apparatus for calibrating a gain for a circuit block are disclosed. An example method includes receiving a plurality of quantizer offsets, where the plurality of quantizer offsets represent calibration data for a quantizer configured to quantize an output of the circuit block, determining one or more differences based on one or more first quantizer offsets of the plurality of quantizer offsets and on one or more second quantizer offsets of the plurality of quantizer offsets, and determining an incremental change in a gain associated with the circuit block based on the one or more differences.

公开(公告)号：US10862500B1

公开(公告)日：2020-12-08

申请号：US16683731

申请日：2019-11-14

Applicant: Xilinx, Inc.

Inventor： Roberto Pelliconi ,  Bob Verbruggen ,  Brendan Farley ,  Christophe Erdmann

IPC: H03M1/66 ,  H04B1/00 ,  H03M1/74

Abstract: Apparatus and associated methods relate to maintaining a total current of a switch cell in a digital-to-analog converter at a controllable operating point by adjusting shunt current control signals applied to programmable shunt current sources in opposite polarity with respect to a tail current control signal applied to a programmable tail current source. In an illustrative example, the total current may flow through differential legs of a switch cell. The programmable shunt current sources may, for example, be configured to compensate for adjustments to the programmable tail current source. In an illustrative example, tail current and shunt currents may flow through a pair of cascode transistors. In various examples, controlling the programmable shunt current sources to compensate adjustments to the tail current source may, for example, permit controlled common mode voltage or operating point so as to reduce device voltage stress over a wider dynamic range of output voltages.

公开(公告)号：US12191876B2

公开(公告)日：2025-01-07

申请号：US18088982

申请日：2022-12-27

Applicant: Xilinx, Inc.

Inventor： Bob Verbruggen ,  Christophe Erdmann

IPC: H03M1/10

Abstract: Methods and apparatus for calibrating a gain for a circuit block are disclosed. An example method includes receiving a plurality of quantizer offsets, where the plurality of quantizer offsets represent calibration data for a quantizer configured to quantize an output of the circuit block, determining one or more differences based on one or more first quantizer offsets of the plurality of quantizer offsets and on one or more second quantizer offsets of the plurality of quantizer offsets, and determining an incremental change in a gain associated with the circuit block based on the one or more differences.