公开(公告)号：US11184018B1

公开(公告)日：2021-11-23

申请号：US17087234

申请日：2020-11-02

Applicant: QUALCOMM Incorporated

Inventor： Xilin Liu ,  Parisa Mahmoudidaryan ,  Shahin Mehdizad Taleie ,  Negar Rashidi ,  Dongwon Seo

IPC: H03M1/18 ,  H03M1/82 ,  H03M1/06 ,  H03M1/10 ,  H03K5/156 ,  H03K5/05 ,  H03M1/80 ,  H03K5/00

Abstract: Certain aspects of the present disclosure generally relate to circuitry and techniques for digital-to-analog conversion. For example, certain aspects provide an apparatus for digital-to-analog conversion. The apparatus generally includes a mixing-mode digital-to-analog converter (DAC), a duty cycle adjustment circuit having an input coupled to an input clock node and having an output coupled to a clock input of the mixing-mode DAC, and a current comparison circuit having inputs coupled to outputs of the mixing-mode DAC and having an output coupled to a control input of the duty cycle adjustment circuit.

公开(公告)号：US11621716B1

公开(公告)日：2023-04-04

申请号：US17448461

申请日：2021-09-22

Applicant: QUALCOMM Incorporated

Inventor： Parisa Mahmoudidaryan ,  Nitz Saputra ,  Dongwon Seo ,  Shahin Mehdizad Taleie

IPC: H03M1/66 ,  H03M1/06

Abstract: Certain aspects of the present disclosure generally relate to circuitry and techniques for digital-to-analog conversion. One example device for digital-to-analog conversion generally includes: a digital-to-analog converter (DAC) having an input coupled to an input node of the device; a first return-to-zero (RZ) DAC having an input coupled to an input node of the device; and a combiner, wherein an output of the first DAC is coupled to a first input of the combiner, and wherein an output of the first RZ DAC is coupled to a second input of the combiner.

公开(公告)号：US10666285B1

公开(公告)日：2020-05-26

申请号：US16202723

申请日：2018-11-28

Applicant: QUALCOMM Incorporated

Inventor： Shahin Mehdizad Taleie ,  Behnam Sedighi ,  Dongwon Seo ,  Parisa Mahmoudidaryan ,  Bhushan Shanti Asuri ,  Sang-June Park ,  Shrenik Patel

IPC: H03M1/66

Abstract: Certain aspects of the present disclosure generally relate to circuitry and techniques for digital-to-analog conversion. One example system for digital-to-analog conversion generally includes a first digital-to-analog converter (DAC) having an input coupled to an input node of the system and a mixing-mode DAC having an input coupled to an input node of the system. The mixing-mode DAC may include a second DAC and a mixer, an output of the second DAC being coupled to an input of the mixer. The system may also include a combiner, wherein an output of the first DAC is coupled to a first input of the combiner, and wherein an output of the mixer is coupled to a second input of the combiner.