公开(公告)号：US20210175875A1

公开(公告)日：2021-06-10

申请号：US17101685

申请日：2020-11-23

Applicant: QUALCOMM Incorporated

Inventor： Miao LI ,  Yu SONG ,  Jie XU

IPC: H03K3/012 ,  H03F3/45 ,  H03K17/687 ,  G11C11/4093

Abstract: A data transmitter includes: a plurality of parallel driver slices, a first slice of the plurality of parallel driver slices having a first signal generator circuit with a first transistor coupled to a data signal and in series with a second transistor coupled to a first bias signal; and a first bias circuit including a third transistor and a fourth transistor in series with a first current source, the first bias circuit further including a first operational amplifier (op amp) having a first input coupled to a first reference voltage and a second input coupled between the fourth transistor and the first current source, an output of the first op amp configured to provide the first bias signal to the second transistor and to the third transistor.

公开(公告)号：US20200280295A1

公开(公告)日：2020-09-03

申请号：US16452003

申请日：2019-06-25

Applicant: QUALCOMM Incorporated

Inventor： Siqi FAN ,  Li SUN ,  Dong REN ,  Miao LI ,  Jie XU

IPC: H03H5/00

Abstract: Aspects of the disclosure are directed to a low noise T-coil design. In accordance with one aspect, an input/output (I/O) circuit includes a first T-coil, wherein the first T-coil includes a first set of two inductors connected to each other in series arranged to accommodate a first current flow to produce a first magnetic field with a first perpendicular direction; and a second T-coil, wherein the second T-coil includes a second set of two inductors connected to each other in series arranged to accommodate a second current flow to produce a second magnetic field with a second perpendicular direction; and wherein the second magnetic field cancels the first magnetic field.