公开(公告)号：US20170265771A1

公开(公告)日：2017-09-21

申请号：US15465484

申请日：2017-03-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Anand Hariraj UDUPA ,  Hussam AHMED ,  Jagannathan VENKATARAMAN ,  Sandeep Kesrimal OSWAL ,  Prabin Krishna YADAV ,  Anand REGHUNATHAN ,  Kiran RAJMOHAN

IPC: A61B5/053 ,  G01R35/00 ,  G01R27/26

Abstract: A system may comprise: an excitation current source; a first electrode coupled to the excitation current source; and a second electrode coupled to the excitation current source. The first and second electrodes may be configured to pass an excitation current from the excitation current source through a human body. First and second calibration resistors may be coupled to and positioned between the excitation current source and the first electrode. Third and fourth calibration resistors may be coupled to and positioned between the excitation current source and the second electrode. The system may also comprise a sensor configured to measure voltages across each of the first, second, third, and fourth calibration resistors.

公开(公告)号：US20240291451A1

公开(公告)日：2024-08-29

申请号：US18175785

申请日：2023-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ravikumar PATTIPAKA ,  Raja SEKHAR ,  Sandeep Kesrimal OSWAL

IPC: H03F3/45 ,  H03F1/26 ,  H03F3/21

CPC classification number: H03F3/45076 ,  H03F1/26 ,  H03F3/211

Abstract: In an example, a circuit includes a high side output transistor having a control terminal coupled to a first capacitor, and includes a low side output transistor having a control terminal coupled to a second capacitor and a balancing capacitor. The circuit includes a first differential input stage configured to receive a differential input and provide a first output current to the control terminal of the high side output transistor. The circuit includes a second differential input stage configured to receive the differential input and provide a second output current to the control terminal of the low side output transistor. The circuit includes a floating battery coupled to the control terminal of the high side output transistor and the control terminal of the low side output transistor. The balancing capacitor balances a gate-to-source capacitance of the low side output transistor with a gate-to-source capacitance of the high side output transistor.

公开(公告)号：US20210159910A1

公开(公告)日：2021-05-27

申请号：US17168584

申请日：2021-02-05

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Srinivasa Rao MADALA ,  Rahul SHARMA ,  Sandeep Kesrimal OSWAL

IPC: H03M1/76 ,  H03M1/06 ,  H04B1/04 ,  H03M1/54 ,  H04L25/03 ,  H03M1/12

Abstract: A digital-to-analog converter system has digital-to-analog converters, a common output, and a digital controller for transmitting first codes to one of the converters at a radio-frequency digital rate, and for transmitting second codes to another one of the converters at the same rate. The digital controller includes a timing system for operating each converter at the digital rate in a return-to-zero configuration, such that a signal from the first converter is transmitted to the common output while the second converter is reset, and vice versa. The digital-to-analog converter system can generate a radio-frequency analog signal having signals in first and second Nyquist zones simultaneously.

公开(公告)号：US20200212954A1

公开(公告)日：2020-07-02

申请号：US16234672

申请日：2018-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aravind MIRIYALA ,  Ravikumar PATTIPAKA ,  Raja Sekhar KANAKAMEDALA ,  Sandeep Kesrimal OSWAL

IPC: H04B1/44 ,  B06B1/02 ,  H04B11/00

Abstract: An ultrasound system includes a transmit-receive switch. The transmit-receive switch includes a combined transmit-receive and return-to-zero (RTZ) path. The combined transmit-receive and RTZ path includes a transistor with a first current terminal, a second current terminal, and a control terminal. The second current terminal of the transistor is coupled to a ground node via a first switch and is coupled to a receive node via a second switch. The ultrasound system also includes a receiver front-end circuit coupled to the receive node.

公开(公告)号：US20200212928A1

公开(公告)日：2020-07-02

申请号：US16555160

申请日：2019-08-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Srinivasa Rao MADALA ,  Rahul SHARMA ,  Sandeep Kesrimal OSWAL

IPC: H03M1/76 ,  H03M1/12 ,  H03M1/54 ,  H03M1/06 ,  H04L25/03 ,  H04B1/04

Abstract: A digital-to-analog converter system has digital-to-analog converters, a common output, and a digital controller for transmitting first codes to one of the converters at a radio-frequency digital rate, and for transmitting second codes to another one of the converters at the same rate. The digital controller includes a timing system for operating each converter at the digital rate in a return-to-zero configuration, such that a signal from the first converter is transmitted to the common output while the second converter is reset, and vice versa. The digital-to-analog converter system can generate a radio-frequency analog signal having signals in first and second Nyquist zones simultaneously.

公开(公告)号：US20170299429A1

公开(公告)日：2017-10-19

申请号：US15491729

申请日：2017-04-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Hussam AHMED ,  Jagannathan VENKATARAMAN ,  Sandeep Kesrimal OSWAL ,  Hari Babu TIPPANA ,  Anand Hariraj UDUPA

IPC: G01J1/44 ,  H01L31/107

CPC classification number: G01J1/44 ,  G01J2001/444 ,  G01J2001/446 ,  H01L31/02019 ,  H01L31/107

Abstract: At least some embodiments are directed to a light detection system comprising a photodiode, a transimpedance amplifier (TIA) having a differential output and a differential input coupled across the photodiode, a first bias current source coupled to an anode of the photodiode, and a second bias current source coupled to a cathode of the photodiode. The system also comprises a dynamic control logic coupled to the first and second bias current sources and configured to vary bias currents provided by the first and second bias current sources based on the differential output such that the photodiode is reverse-biased.