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公开(公告)号：US20150015177A1
公开(公告)日：2015-01-15
申请号：US14222865
申请日：2014-03-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anuj Jain , Mario Marascutti , Wenchao Qu , Michael Edwin Butenhoff
IPC: H02P8/32
CPC classification number: H02P8/12
Abstract: Stepper motor winding current regulation methods and apparatus continuously and bi-directionally sense winding current to determine both the magnitude of the winding current and the slope of a waveform representing the winding current. The magnitude and slope information is used to more precisely control periods of current rise and characteristics of fast and slow current decay during pulse-width modulation (“PWM”) regulation cycles. Winding current rise and decay shaping is based upon the sensed magnitude of the winding current, the magnitude of the winding current regulation set-point ITRIP, whether the sensed winding current is greater than or less than ITRIP at a selected sampling time, whether the sensed winding current is increasing or decreasing when a waveform of the sensed winding current crosses over ITRIP, and whether or not the magnitude of ITRIP changes during a PWM cycle in response to a receipt of a subsequent DAC code.
Abstract translation: 步进电机绕组电流调节方法和设备连续双向检测绕组电流，以确定绕组电流的大小和表示绕组电流的波形的斜率。 幅度和斜率信息用于更精确地控制电流上升的周期和脉冲宽度调制（“PWM”）调节周期期间快速和慢速电流衰减的特性。 绕组电流上升和衰减整形基于感测到的绕组电流的大小，绕组电流调节设定值ITRIP的幅度，无论检测到的绕组电流是否大于或小于选定采样时间的ITRIP，是否检测到 当检测到的绕组电流的波形跨越ITRIP时，绕组电流是增加或减小，以及响应于接收到的后续DAC代码，在PWM周期期间ITRIP的大小是否改变。
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公开(公告)号：US20190158033A1
公开(公告)日：2019-05-23
申请号：US15816369
申请日：2017-11-17
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Seung Bae Lee , Michael Edwin Butenhoff , Sudhir Nagaraj
Abstract: Reducing noise for an amplifier-based system circuit that comprises a first differential input pair and a second differential input pair, a first input stage circuit connected to the first differential input pair, wherein the first input stage is configured with a first transconductance value, a second input stage circuit connected to the second differential input pair, wherein the second input stage is configured with a second transconductance value that is less than the first transconductance value, a transimpedance circuit coupled to the first input stage circuit and the second input stage circuit, and a feedback loop circuit coupled to the transimpedance circuit and to the second differential input pair, wherein the feedback loop circuit is not connected to the first differential input pair.
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公开(公告)号：US20210083607A1
公开(公告)日：2021-03-18
申请号：US17101910
申请日：2020-11-23
Applicant: Texas Instruments Incorporated
Inventor： Michael Edwin Butenhoff , Rakesh Raja , Nicholas James Oborny
Abstract: Enhanced motor power control circuitry is presented herein. In one implementation, a circuit includes power transistor elements in a half-bridge arrangement configured to selectively switch current for a phase of a motor according to control signals applied to corresponding gate terminals. The circuit also includes control circuitry configured to produce the control signals to achieve target states among the power transistor elements. The control signals have ramp rates determined based at least on polarities of the current through the power transistor elements during inactive states.
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公开(公告)号：US20200212830A1
公开(公告)日：2020-07-02
申请号：US16236983
申请日：2018-12-31
Applicant: c/o Texas Instruments Incorporated
Inventor： Michael Edwin Butenhoff , Rakesh Raja , Nicholas James Oborny
Abstract: Enhanced motor power control circuitry is presented herein. In one implementation, a circuit includes power transistor elements in a half-bridge arrangement configured to selectively switch current for a phase of a motor according to control signals applied to corresponding gate terminals. The circuit also includes control circuitry configured to produce the control signals to achieve target states among the power transistor elements. The control signals have ramp rates determined based at least on polarities of the current through the power transistor elements during inactive states.
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公开(公告)号：US09246424B2
公开(公告)日：2016-01-26
申请号：US14222865
申请日：2014-03-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anuj Jain , Mario Marascutti , Wenchao Qu , Michael Edwin Butenhoff
CPC classification number: H02P8/12
Abstract: Stepper motor winding current regulation methods and apparatus continuously and bi-directionally sense winding current to determine both the magnitude of the winding current and the slope of a waveform representing the winding current. The magnitude and slope information is used to more precisely control periods of current rise and characteristics of fast and slow current decay during pulse-width modulation (“PWM”) regulation cycles. Winding current rise and decay shaping is based upon the sensed magnitude of the winding current, the magnitude of the winding current regulation set-point ITRIP, whether the sensed winding current is greater than or less than ITRIP at a selected sampling time, whether the sensed winding current is increasing or decreasing when a waveform of the sensed winding current crosses over ITRIP, and whether or not the magnitude of ITRIP changes during a PWM cycle in response to a receipt of a subsequent DAC code.
Abstract translation: 步进电机绕组电流调节方法和设备连续双向检测绕组电流，以确定绕组电流的大小和表示绕组电流的波形的斜率。 幅度和斜率信息用于更精确地控制电流上升的周期和脉冲宽度调制（“PWM”）调节周期期间快速和慢速电流衰减的特性。 绕组电流上升和衰减整形基于感测到的绕组电流的大小，绕组电流调节设定值ITRIP的幅度，无论检测到的绕组电流是否大于或小于选定采样时间的ITRIP，是否检测到 当检测到的绕组电流的波形跨越ITRIP时，绕组电流是增加或减小，以及响应于接收到的后续DAC代码，在PWM周期期间ITRIP的大小是否改变。
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Patent Agency Ranking
公开(公告)号：US20230010450A1
公开(公告)日：2023-01-12
申请号：US17368360
申请日：2021-07-06
Applicant: Texas Instruments Incorporated
Inventor： Shyamsunder Balasubramanian , Michael Edwin Butenhoff , Toshio Yamanaka , Luis Eduardo Ossa
Abstract: An example apparatus includes a level shifter having a first supply input, a gate driver having a second supply input coupled to the first supply input and adapted to be coupled to a cathode of a diode, the gate driver having an output adapted to be coupled to a control terminal of a switch, and a current source circuit having an input and an output, the input adapted to be coupled to a power supply and the output adapted to be coupled to the first supply input, the second supply input and to a capacitor.
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公开(公告)号：US10979045B2
公开(公告)日：2021-04-13
申请号：US16205576
申请日：2018-11-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Michael Edwin Butenhoff , Rakesh Raja , Anuj Jain
IPC: H03K17/687
Abstract: A transistor, e.g., field effect transistor FET, ringing adjustment circuit and method comprising the measuring of a voltage from a transistor (e.g., a node of a FET) during the transistor turning on and turning off, determining the voltage oscillation in the measured voltage by performing a derivative function on the measured voltage and detecting a switch in a voltage change rate from positive to negative or negative to positive, and comparing the voltage change rate after the detected switch to adjust drive current applied to the transistor to optimize efficiency while minimizing voltage oscillation and ringing.
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公开(公告)号：US09791521B2
公开(公告)日：2017-10-17
申请号：US14670078
申请日：2015-03-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Michael Edwin Butenhoff , Keith Ryan Green , Anuj Jain
CPC classification number: G01R33/0023 , G01R33/072
Abstract: A method for verifying an operation of a Hall-effect sensor without an applied magnetic field. The method can include providing a bias signal to a first pair of terminals of a Hall-effect element, applying a Hall current signal to a second pair of terminals of the Hall-effect element, measuring a Hall output voltage across the second pair of terminals and comparing the measured Hall output voltage to an expected Hall output voltage that would be provided by a corresponding applied magnetic field.
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公开(公告)号：US11764664B2
公开(公告)日：2023-09-19
申请号：US17368360
申请日：2021-07-06
Applicant: Texas Instruments Incorporated
Inventor： Shyamsunder Balasubramanian , Michael Edwin Butenhoff , Toshio Yamanaka , Luis Eduardo Ossa
Abstract: An example apparatus includes a level shifter having a first supply input, a gate driver having a second supply input coupled to the first supply input and adapted to be coupled to a cathode of a diode, the gate driver having an output adapted to be coupled to a control terminal of a switch, and a current source circuit having an input and an output, the input adapted to be coupled to a power supply and the output adapted to be coupled to the first supply input, the second supply input and to a capacitor.
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公开(公告)号：US11722126B2
公开(公告)日：2023-08-08
申请号：US17463001
申请日：2021-08-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: A system includes a level shifter coupled to a voltage source, a first transistor, and a second transistor. The system also includes a first current source coupled to the first transistor and the second transistor and configured to bias the first transistor and the second transistor. The system includes a slew detector coupled to the voltage source and to the first current source, where the slew detector is configured to detect a change in voltage of the voltage source, and further configured to provide current to the first current source responsive to detecting the change. The system also includes a second current source coupled in parallel to the first current source, where the second current source is configured to provide current to the first current source responsive to a control signal.
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