公开(公告)号：US20210265958A1

公开(公告)日：2021-08-26

申请号：US16799415

申请日：2020-02-24

Applicant: QUALCOMM Incorporated

Inventor： Khaled Mahmoud ABDELFATTAH ALY ,  Sherif GALAL ,  Xin FAN

IPC: H03F3/183 ,  H03F3/45 ,  H04R3/00

Abstract: Certain aspects of the present disclosure are generally directed to circuitry and techniques for current sensing. For example, certain aspects provide a circuit for signal amplification including a first amplifier, a second amplifier, and a third amplifier. The circuit also includes a first capacitive element coupled between a first output of the first amplifier and a first input of the third amplifier, a second capacitive element coupled between a second output of the first amplifier and a second input of the third amplifier, a third capacitive element coupled between a first output of the second amplifier and the first input of the third amplifier, and a fourth capacitive element coupled between a second output of the second amplifier and the second input of the third amplifier.

公开(公告)号：US20210231710A1

公开(公告)日：2021-07-29

申请号：US17154758

申请日：2021-01-21

Applicant: QUALCOMM Incorporated

Inventor： Ramkumar SIVAKUMAR ,  Jingxue LU ,  Sherif GALAL ,  Xinwang ZHANG ,  Kshitij YADAV

IPC: G01R19/00 ,  H04R3/00 ,  H03F3/217 ,  H03F1/02

Abstract: Certain aspects of the present disclosure are generally directed to circuitry and techniques for voltage-to-current conversion. For example, certain aspects provide a circuit for signal amplification including a first amplifier; a first transistor, a gate of the first transistor being coupled to an output of the first amplifier and a drain of the first transistor being coupled to an output node of circuit; a first resistive element coupled between a first input node of the circuit and an input of the first amplifier; a second amplifier; a second transistor, a gate of the second transistor being coupled to an output of the second amplifier and a drain of the second transistor being coupled to the output node of circuit; and a second resistive element coupled between a second input node of the circuit and an input of the second amplifier.