公开(公告)号：US20170141760A1

公开(公告)日：2017-05-18

申请号：US14941419

申请日：2015-11-13

Applicant: QUALCOMM Incorporated

Inventor： Ibrahim Chamas

IPC: H03H11/12 ,  H03F3/19 ,  H03F3/21 ,  H03M1/66 ,  H03F3/45

CPC classification number: H03H11/1213 ,  H03F1/08 ,  H03F1/3205 ,  H03F1/3241 ,  H03F1/342 ,  H03F3/19 ,  H03F3/195 ,  H03F3/211 ,  H03F3/45076 ,  H03F3/45659 ,  H03F2200/144 ,  H03F2200/171 ,  H03F2200/237 ,  H03F2200/24 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/72 ,  H03F2200/75 ,  H03F2200/91 ,  H03F2203/21106 ,  H03F2203/21115 ,  H03F2203/21157 ,  H03F2203/45002 ,  H03F2203/45004 ,  H03F2203/45126 ,  H03F2203/45154 ,  H03H11/126 ,  H03M1/66

Abstract: Exemplary embodiments of the present disclosure are related to baseband filters. A device may include a digital-to-analog converter (DAC) configured to output a DC current. The device may also include an operational amplifier coupled to an output of the DAC and configured to bias an input stage of the operational amplifier with the DC current.

公开(公告)号：US10454509B2

公开(公告)日：2019-10-22

申请号：US15962865

申请日：2018-04-25

Applicant: QUALCOMM Incorporated

Inventor： Bhushan Shanti Asuri ,  Krishnaswamy Thiagarajan ,  Ashok Swaminathan ,  Shahin Mehdizad Taleie ,  Yen-Wei Chang ,  Vinod Panikkath ,  Sameer Vasantlal Vora ,  Ayush Mittal ,  Tonmoy Biswas ,  Sy-Chyuan Hwu ,  Zhilong Tang ,  Ibrahim Chamas ,  Ping Wing Lai ,  Behnam Sedighi ,  Dongwon Seo ,  Nitz Saputra

IPC: H04B1/04 ,  H04L27/20 ,  H04B1/00

Abstract: A communication circuit may include a first pair of digital-to-analog converters (DACs) coupled to an input of a first mixer and configured to generate first baseband signals. The communication circuit may further include a second pair of DACs coupled to an input of a second mixer and configured to generate second baseband signals. The second baseband signals may be shifted in phase relative to the first baseband signals.

公开(公告)号：US20190097583A1

公开(公告)日：2019-03-28

申请号：US16138811

申请日：2018-09-21

Applicant: Qualcomm Incorporated

Inventor： Ibrahim Chamas

IPC: H03F1/02 ,  H03F3/213 ,  H03F3/45

Abstract: Amplifier configuration for load-line enhancement is described herein. In some implementations, an apparatus includes an amplifier. The amplifier includes at least one plus transistor stack, at least one minus transistor stack, and at least one inductor. The at least one plus transistor stack is coupled to a plus amplifier node and a plus input node. The at least one minus transistor stack is coupled to a minus amplifier node and a minus input node. The at least one inductor is coupled between the plus amplifier node and the minus amplifier node, with the at least one inductor including an inter-inductor node. The amplifier also includes a minus power switch coupled between the minus amplifier node and one or more supply voltages and an inductor power switch coupled between the inter-inductor node and at least one supply voltage.

公开(公告)号：US09647639B1

公开(公告)日：2017-05-09

申请号：US14941419

申请日：2015-11-13

Applicant: QUALCOMM Incorporated

Inventor： Ibrahim Chamas

IPC: H03K5/00 ,  H03F3/45 ,  H03H11/12 ,  H03M1/66 ,  H03F3/21 ,  H03F3/19

CPC classification number: H03H11/1213 ,  H03F1/08 ,  H03F1/3205 ,  H03F1/3241 ,  H03F1/342 ,  H03F3/19 ,  H03F3/195 ,  H03F3/211 ,  H03F3/45076 ,  H03F3/45659 ,  H03F2200/144 ,  H03F2200/171 ,  H03F2200/237 ,  H03F2200/24 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/72 ,  H03F2200/75 ,  H03F2200/91 ,  H03F2203/21106 ,  H03F2203/21115 ,  H03F2203/21157 ,  H03F2203/45002 ,  H03F2203/45004 ,  H03F2203/45126 ,  H03F2203/45154 ,  H03H11/126 ,  H03M1/66

Abstract: Exemplary embodiments of the present disclosure are related to baseband filters. A device may include a digital-to-analog converter (DAC) configured to output a DC current. The device may also include an operational amplifier coupled to an output of the DAC and configured to bias an input stage of the operational amplifier with the DC current.