公开(公告)号：US20230324941A1

公开(公告)日：2023-10-12

申请号：US18209526

申请日：2023-06-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Boqiang Xiao ,  Avinash Shreepathi Bhat

IPC: G05F3/22

CPC classification number: G05F3/22

Abstract: A bandgap current reference circuit includes a bandgap core circuit and an error amplifier. The bandgap core circuit is configured to generate a zero temperature coefficient bandgap current. The bandgap core circuit includes a bipolar transistor. The bipolar transistor is configured to pass a current that is proportional to absolute temperature (PTAT current). The error amplifier is coupled to the bandgap core circuit and includes a bipolar differential input pair. The bipolar differential input pair is configured to ensure that the PTAT current is flowing in the bipolar transistor.

公开(公告)号：US20250123646A1

公开(公告)日：2025-04-17

申请号：US18821302

申请日：2024-08-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kang Wei ,  Boqiang Xiao ,  Timothy Merkin ,  Joseph Sankman

IPC: G05F1/575 ,  G05F1/563 ,  G05F1/595 ,  H02M3/07

Abstract: An integrated circuit includes a first transistor coupled between a power input and a power output, the first transistor being an N-type transistor and having a first transistor control input; a first amplifier stage having a reference input, a feedback input, and a first amplifier output, the feedback input coupled to the power output; a second amplifier stage having an amplifier input and a second amplifier output, the amplifier input coupled to the first amplifier output, and the second amplifier output coupled to the first transistor control input; and a first biasing circuit coupled to the first transistor control input, the first biasing circuit having an electrical control input coupled to the power output.

公开(公告)号：US12153459B2

公开(公告)日：2024-11-26

申请号：US17734028

申请日：2022-04-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Boqiang Xiao ,  Avinash Shreepathi Bhat

IPC: G05F1/575 ,  G05F1/563 ,  G05F3/26

Abstract: In an example, a circuit includes an input stage having a control voltage input, a feedback input, a first control output and a second control output. The feedback input is coupled to a driver output. A first path stage has a first voltage input and a third output. The first voltage input is coupled to the first control output, and the third output is coupled to the driver output. A second path stage has a second voltage input and a fourth output. The second voltage input is coupled to the second control output, and the fourth output is coupled to the driver output. A load transistor has a control input coupled to the driver output. The input stage is configured to provide gm-boosting to the first path stage to turn on the load transistor responsive to an output voltage at a voltage output.

公开(公告)号：US11714444B2

公开(公告)日：2023-08-01

申请号：US17853358

申请日：2022-06-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Boqiang Xiao ,  Avinash Shreepathi Bhat

IPC: G05F3/22

CPC classification number: G05F3/22

Abstract: A bandgap current reference circuit includes a bandgap core circuit and an error amplifier. The bandgap core circuit is configured to generate a zero temperature coefficient bandgap current. The bandgap core circuit includes a bipolar transistor. The bipolar transistor is configured to pass a current that is proportional to absolute temperature (PTAT current). The error amplifier is coupled to the bandgap core circuit and includes a bipolar differential input pair. The bipolar differential input pair is configured to ensure that the PTAT current is flowing in the bipolar transistor.

公开(公告)号：US20230122789A1

公开(公告)日：2023-04-20

申请号：US17734028

申请日：2022-04-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Boqiang Xiao ,  Avinash Shreepathi Bhat

IPC: G05F1/563 ,  G05F1/575 ,  G05F3/26

Abstract: In an example, a circuit includes an input stage having a control voltage input, a feedback input, a first control output and a second control output. The feedback input is coupled to a driver output. A first path stage has a first voltage input and a third output. The first voltage input is coupled to the first control output, and the third output is coupled to the driver output. A second path stage has a second voltage input and a fourth output. The second voltage input is coupled to the second control output, and the fourth output is coupled to the driver output. A load transistor has a control input coupled to the driver output. The input stage is configured to provide gm-boosting to the first path stage to turn on the load transistor responsive to an output voltage at a voltage output.