公开(公告)号：US20220209730A1

公开(公告)日：2022-06-30

申请号：US17136073

申请日：2020-12-29

Applicant: Texas Instruments Incorporated

Inventor： Vadim Valerievich Ivanov ,  Munaf Hussain Shaik ,  Srinivas Kumar Pulijala ,  Patrick Forster ,  Jerry Lee Doorenbos

IPC: H03F3/45 ,  H03M1/38 ,  H03M1/66

Abstract: Disclosed is a system that comprises an operational amplifier with adjustable operational parameters and a trimming module. The trimming module can adjust the operational parameters of the op-amp based on a memory value to compensate for an offset voltage of the op-amp. The trimming module can comprise successive approximation register (SAR) logic that controls the memory value. The SAR logic can be configured to detect a given memory value that causes an output voltage of the op-amp to be within a predetermined voltage interval when applying a predetermined common mode voltage to inverting and non-inverting inputs of the op-amp.

公开(公告)号：US12068730B2

公开(公告)日：2024-08-20

申请号：US17307327

申请日：2021-05-04

Applicant: Texas Instruments Incorporated

Inventor： Vadim Valerievich Ivanov ,  Munaf Hussain Shaik ,  Srinivas Kumar Pulijala ,  Patrick Forster ,  Jerry Lee Doorenbos

IPC: H03F3/45 ,  H03M1/38 ,  H03M1/66 ,  H03F3/21

CPC classification number: H03F3/45475 ,  H03M1/38 ,  H03M1/66 ,  H03F3/211 ,  H03F2200/129

Abstract: Disclosed is a system comprising a plurality of operational amplifiers, each operational amplifier having individually adjustable operational parameters, and a trimming circuit. The trimming circuit includes successive approximation register (SAR) logic that determines associated memory values. The trimming circuit changes the adjustable operational parameters of each operation amplifier based on the associated memory values.

公开(公告)号：US10461771B2

公开(公告)日：2019-10-29

申请号：US16054877

申请日：2018-08-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jerry Lee Doorenbos ,  Keith Eric Sanborn ,  Srikanth Vellore Avadhanam Ramamurthy ,  Mina Raymond Naguib Nashed ,  Dwight David Griffin

IPC: H03M3/00

Abstract: In some examples, a sigma-delta analog-to-digital converter (ADC), comprises a first set of switches configured to receive a first voltage signal; a second set of switches coupled to the first set of switches at a first node and a second node, the second set of switches configured to receive a second voltage signal; an integrator including a first input sampling capacitor coupled to the first node and a second input sampling capacitor coupled to the second node, wherein the integrator configured to generate a first output signal. The sigma-delta ADC further comprises a comparator coupled to the integrator and configured to generate a second output signal based on the first output signal; and a controller unit having a first counter, a second counter, and a processor, the controller unit coupled to the first and second sets of switches, the integrator, and the comparator.

公开(公告)号：US20220360239A1

公开(公告)日：2022-11-10

申请号：US17307327

申请日：2021-05-04

Applicant: Texas Instruments Incorporated

Inventor： Vadim Valerievich Ivanov ,  Munaf Hussain Shaik ,  Srinivas Kumar Pulijala ,  Patrick Forster ,  Jerry Lee Doorenbos

IPC: H03F3/45 ,  H03M1/38 ,  H03M1/66

Abstract: Disclosed is a system comprising a plurality of operational amplifiers, each operational amplifier having individually adjustable operational parameters, and a trimming circuit. The trimming circuit includes successive approximation register (SAR) logic that determines associated memory values. The trimming circuit changes the adjustable operational parameters of each operation amplifier based on the associated memory values.

公开(公告)号：US10305507B1

公开(公告)日：2019-05-28

申请号：US15982670

申请日：2018-05-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jerry Lee Doorenbos ,  Keith Eric Sanborn ,  Mina Raymond Naguib Nashed ,  Srikanth Vellore Avadhanam Ramamurthy ,  Dwight David Griffin

IPC: H03M3/00

Abstract: A first-order sigma-delta analog-to-digital converter includes an input terminal, an integrator circuit, a comparator, and control circuitry. The input terminal is configured to receive a unipolar input signal to be digitized. The integrator circuit is coupled to the input terminal. The comparator is coupled to an output of the integrator circuit. The control circuitry is coupled to the integrator circuit and the comparator. The control circuitry is configured to equalize time that an output signal generated by the integrator circuit is greater than zero and time that the output signal generated by the integrator circuit is less than zero during digitization of the unipolar input signal.

公开(公告)号：US11881825B2

公开(公告)日：2024-01-23

申请号：US17136073

申请日：2020-12-29

Applicant: Texas Instruments Incorporated

Inventor： Vadim Valerievich Ivanov ,  Munaf Hussain Shaik ,  Srinivas Kumar Pulijala ,  Patrick Forster ,  Jerry Lee Doorenbos

IPC: H03F3/45 ,  H03M1/66 ,  H03M1/38

CPC classification number: H03F3/45475 ,  H03M1/38 ,  H03M1/66 ,  H03F2200/375

Abstract: Disclosed is a system that comprises an operational amplifier with adjustable operational parameters and a trimming module. The trimming module can adjust the operational parameters of the op-amp based on a memory value to compensate for an offset voltage of the op-amp. The trimming module can comprise successive approximation register (SAR) logic that controls the memory value. The SAR logic can be configured to detect a given memory value that causes an output voltage of the op-amp to be within a predetermined voltage interval when applying a predetermined common mode voltage to inverting and non-inverting inputs of the op-amp.

公开(公告)号：US09195341B2

公开(公告)日：2015-11-24

申请号：US14180404

申请日：2014-02-14

Applicant: Texas Instruments Incorporated

Inventor： Baboo Vikrhamsingh Gowreesunker ,  Ranga Seshu Paladugu ,  Jerry Lee Doorenbos

IPC: G06F3/045 ,  G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/0418 ,  G06F3/044

Abstract: Touch screen controllers and methods are presented for removing charger noise and other high frequency noise from touch screens in the presence of aliasing in which a digital low pass filter rejects the high frequency noise, a noise tracker determines whether noise is being aliased into the low pass filter pass band, and a noise shaper artificially induces or modifies aliasing in the system by adjusting an analog-to-digital converter sampling frequency and/or a panel scan frequency to try to move the aliased noise outside the low pass filter pass band.

Abstract translation: 提供了触摸屏控制器和方法，用于在存在数字低通滤波器拒绝高频噪声的混叠的情况下从触摸屏去除充电器噪声和其它高频噪声，噪声跟踪器确定噪声是否被混叠成低通 滤波器通带，并且噪声整形器通过调整模数转换器采样频率和/或面板扫描频率来人为地诱导或修改系统中的混叠，以尝试将低通滤波器通带外的混叠噪声移动。

公开(公告)号：US20150234519A1

公开(公告)日：2015-08-20

申请号：US14180404

申请日：2014-02-14

Applicant: Texas Instruments Incorporated

Inventor： Baboo Vikrhamsingh Gowreesunker ,  Ranga Seshu Paladugu ,  Jerry Lee Doorenbos

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/0418 ,  G06F3/044

Abstract: Touch screen controllers and methods are presented for removing charger noise and other high frequency noise from touch screens in the presence of aliasing in which a digital low pass filter rejects the high frequency noise, a noise tracker determines whether noise is being aliased into the low pass filter pass band, and a noise shaper artificially induces or modifies aliasing in the system by adjusting an analog-to-digital converter sampling frequency and/or a panel scan frequency to try to move the aliased noise outside the low pass filter pass band.

Abstract translation: 提供了触摸屏控制器和方法，用于在存在数字低通滤波器拒绝高频噪声的混叠的情况下从触摸屏去除充电器噪声和其它高频噪声，噪声跟踪器确定噪声是否被混叠成低通 滤波器通带，并且噪声整形器通过调整模数转换器采样频率和/或面板扫描频率来人为地诱导或修改系统中的混叠，以尝试将低通滤波器通带外的混叠噪声移动。