公开(公告)号：US20230115601A1

公开(公告)日：2023-04-13

申请号：US17449293

申请日：2021-09-29

Applicant: XILINX, INC.

Inventor： Kai-An HSIEH ,  Tan Kee HIAN ,  Kevin ZHENG

IPC: H03M1/06

Abstract: Analog-to-digital converter circuitry includes comparator circuitry, capacitor analog-to-digital converter circuitry (CDA), and successive approximation register (SAR) circuitry. The comparator circuitry includes a non-inverting input and an inverting input to selectively receive a differential voltage signal, and an output. The CDAC circuitry includes a first capacitor network having a first plurality of capacitors. A first capacitor of the first plurality of capacitors includes a first terminal connected to the non-inverting input and a second terminal selectively connected to a first voltage potential and a second voltage potential. The first voltage potential is greater than the second voltage potential. The SAR circuitry is connected to the output and the first capacitor network, and connects, during a first period, the second terminal of the first capacitor to the second voltage potential. The non-inverting input and the inverting input are connected to the differential voltage signal during the first period.

公开(公告)号：US20230253975A1

公开(公告)日：2023-08-10

申请号：US17669254

申请日：2022-02-10

Applicant: XILINX, INC.

Inventor： Kai-An HSIEH ,  Tan Kee HIAN

IPC: H03M1/08

CPC classification number: H03M1/0863

Abstract: A digital-to-analog converter (DAC)-based voltage-mode transmit driver architecture. One example transmit driver circuit generally includes an impedance control circuit coupled to a plurality of DAC driver slices. The impedance control circuit generally includes a tunable impedance configured to be adjusted to match a load impedance for the transmit driver circuit. Another example transmit driver circuit generally has an output impedance that is smaller than the load impedance for the transmit driver circuit, such that an output voltage swing at differential output nodes of the transmit driver circuit is greater than a voltage of a power supply rail. Another example transmit driver circuit generally includes a predriver circuit with a first inverter coupled to a first output of the predriver circuit and a second inverter coupled to a second output of the predriver circuit, the transistors in at least one of the first inverter or the second inverter having different strengths.