公开(公告)号：US10663572B2

公开(公告)日：2020-05-26

申请号：US16012193

申请日：2018-06-19

Applicant: QUALCOMM Incorporated

Inventor： Shahin Mehdizad Taleie ,  Chen Jiang ,  Dongwon Seo ,  Udara Fernando ,  Shrenik Patel ,  Roberto Rimini ,  Anant Gupta

IPC: H04B1/40 ,  G01S13/34 ,  G01S13/02 ,  H04L27/36 ,  H03M1/66 ,  H04L27/38

Abstract: Certain aspects of the present disclosure generally relate to a programmable multi-mode digital-to-analog converter (DAC) for generating a frequency-modulated signal. For example, certain aspects provide a circuit for sweeping a frequency of an output signal. The circuit generally includes a DAC having an input coupled to an input path of the circuit and an output coupled to an output path of the circuit, a first mixer selectively incorporated in the input path coupled to the input of the DAC, and a second mixer selectively incorporated in the output path coupled to the output of the DAC.

公开(公告)号：US10686476B1

公开(公告)日：2020-06-16

申请号：US16417455

申请日：2019-05-20

Applicant: QUALCOMM Incorporated

Inventor： Shahin Mehdizad Taleie ,  Nitz Saputra ,  Chen Jiang ,  Behnam Sedighi ,  Ibrahim Ramez Chamas ,  Bhushan Shanti Asuri ,  Dongwon Seo

IPC: H04B1/04 ,  H03M3/00 ,  H03M1/66 ,  H04L25/49 ,  H03F3/24

Abstract: An RF-DAC transmitter is provided that includes an in-phase channel, a quadrature-phase channel, a first intermediate-phase channel, and a second intermediate-phase channel. Each channel includes a pair of interleaved RF-DACs for producing a pair of interleaved RF signals and a subtractor.