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公开(公告)号：US10374510B2
公开(公告)日：2019-08-06
申请号：US15715975
申请日：2017-09-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yongbin Chu , Jeffrey Anthony Morroni , Yogesh Kumar Ramadass
Abstract: An active electromagnetic interference (EMI) filter includes an amplifier configured to sense noise signals on a power conductor, and drive a cancellation signal onto the power conductor. The cancellation signal is to reduce the amplitude of the noise signals. Some embodiments of the active EMI filter include a high frequency compensation network that improves the high frequency phase margin of the active EMI filter and improves the stability of the active EMI filter at high frequencies. Some embodiments of the active EMI filter include a low frequency compensation capacitor that increases the phase margin of the active EMI filter at low frequencies. Some embodiments of the active EMI filter include low frequency compensation circuitry that increases the low frequency tolerance of the active EMI filter.
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公开(公告)号：US20180226883A1
公开(公告)日：2018-08-09
申请号：US15944833
申请日：2018-04-04
Applicant: Texas Instruments Incorporated
Inventor： Nachiket Venkappayya Desai , Yogesh Kumar Ramadass
CPC classification number: H02M1/36 , H02M3/33507 , H02M3/33523
Abstract: A circuit includes a transformer configured with a primary winding and a secondary winding that are driven from a voltage supplied by a thermoelectric generator (TEG). The circuit includes a bipolar startup stage (BSS) coupled to the transformer to generate an intermediate voltage. The BSS includes a first transistor device coupled in series with the primary winding of the transformer to form an oscillator circuit with an inductance of the secondary winding when the voltage supplied by the TEG is positive. A second transistor device coupled to the secondary winding of the transformer enables the oscillator circuit to oscillate when the voltage supplied by the TEG is negative. After startup, a flyback converter stage can be enabled from the intermediate voltage to generate a boosted regulated output voltage.
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公开(公告)号：US10009022B2
公开(公告)日：2018-06-26
申请号：US15653562
申请日：2017-07-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yogesh Kumar Ramadass
IPC: H03K17/687
CPC classification number: H03K17/687 , H03K17/162 , H03K17/567 , H03K2217/0036
Abstract: Embodiment of the inventive subject matter include an apparatus comprising a first switch, a second switch, a third switch, and a transistor. The first switch is coupled to a first voltage device and the transistor to selectively electrically connect the first voltage device to the transistor to provide a first charge to the transistor. The second switch is coupled to a second voltage device and the transistor to selectively electrically connect the second voltage device to the transistor to remove charge from the transistor. The third switch is coupled to the third voltage device and the transistor to selectively couple the third voltage device to the transistor to provide a second charge to the transistor.
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公开(公告)号：US09748950B2
公开(公告)日：2017-08-29
申请号：US14970694
申请日：2015-12-16
Applicant: Texas Instruments Incorporated
Inventor： Yogesh Kumar Ramadass
IPC: H03K17/60 , H03K17/687
CPC classification number: H03K17/687 , H03K17/162 , H03K17/567 , H03K2217/0036
Abstract: Embodiment of the inventive subject matter include an apparatus comprising a first switch, a second switch, a third switch, and a transistor. The first switch is coupled to a first voltage device and the transistor to selectively electrically connect the first voltage device to the transistor to provide a first charge to the transistor. The second switch is coupled to a second voltage device and the transistor to selectively electrically connect the second voltage device to the transistor to remove charge from the transistor. The third switch is coupled to the third voltage device and the transistor to selectively couple the third voltage device to the transistor to provide a second charge to the transistor.
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公开(公告)号：US20140062256A1
公开(公告)日：2014-03-06
申请号：US14015647
申请日：2013-08-30
Applicant: Texas Instruments Incorporated
Inventor： Dennis Darcy Buss , Yogesh Kumar Ramadass
IPC: H02N2/18
CPC classification number: H02N2/181 , H01L41/1136 , H02N2/188
Abstract: Piezoelectric harvesting devices are disclosed herein. An embodiment of a harvesting device includes a cantilever having a resonant frequency associated therewith, wherein the cantilever vibrates when in the presence of a vibration source, and wherein the harvesting device generates a current upon vibration of the cantilever. The generated current is present at an output. A bias flip circuit is used to tune the resonant frequency of the harvesting device based on measurements of the vibration source that causes the cantilever to vibrate, wherein the bias flip circuit includes a switch that connects and disconnects an inductor to the output.
Abstract translation: 本文公开了压电收获装置。 收获装置的实施例包括具有与其相关联的共振频率的悬臂，其中当存在振动源时悬臂振动，并且其中收获装置在悬臂振动时产生电流。 产生的电流存在于输出端。 偏置翻转电路用于基于导致悬臂振动的振动源的测量来调谐收获装置的谐振频率，其中偏置翻转电路包括将电感器连接到输出端的开关。
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Patent Agency Ranking
公开(公告)号：US20250023461A1
公开(公告)日：2025-01-16
申请号：US18899286
申请日：2024-09-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yongbin Chu , Yogesh Kumar Ramadass
Abstract: In some examples, a circuit includes an amplifier, a resistor, and a damping network. The amplifier has an amplifier output and first and second amplifier inputs. The first amplifier input is adapted to be coupled to a first terminal, and the second amplifier input is configured to receive a reference voltage. The resistor is coupled between the amplifier output and the first amplifier input. The damping network is coupled between the amplifier output and the first terminal.
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公开(公告)号：US20240413800A1
公开(公告)日：2024-12-12
申请号：US18808183
申请日：2024-08-19
Applicant: Texas Instruments Incorporated
Inventor： Shailendra Kumar Baranwal , Yogesh Kumar Ramadass , Yinglai Xia
Abstract: Described embodiments include an audio amplifier circuit that includes a first amplifier having a differential first amplifier input adapted to be coupled to an audio input source, a multiplexer having first and second mux inputs, a control input and a mux output. The first mux input is coupled to the differential amplifier output. There is a signal generator having a generator input coupled to the mux output. There is also a driver circuit having a driver circuit input and a driver circuit output, the driver circuit input coupled to the generator output, and a second amplifier having a first error input coupled to a current sense terminal that is configured to provide a voltage proportional to a current supplied from a power supply terminal, and a second error input coupled to a current limit terminal configured to provide a reference voltage proportional to a current limit value.
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公开(公告)号：US12095429B2
公开(公告)日：2024-09-17
申请号：US17461495
申请日：2021-08-30
Applicant: Texas Instruments Incorporated
Inventor： Shailendra Kumar Baranwal , Yogesh Kumar Ramadass , Yinglai Xia
CPC classification number: H03F3/2171 , H03F1/0205 , H04R3/00 , H03F2200/03
Abstract: Described embodiments include an audio amplifier circuit that includes a first amplifier having a differential first amplifier input adapted to be coupled to an audio input source, a multiplexer having first and second mux inputs, a control input and a mux output. The first mux input is coupled to the differential amplifier output. There is a signal generator having a generator input coupled to the mux output. There is also a driver circuit having a driver circuit input and a driver circuit output, the driver circuit input coupled to the generator output, and a second amplifier having a first error input coupled to a current sense terminal that is configured to provide a voltage proportional to a current supplied from a power supply terminal, and a second error input coupled to a current limit terminal configured to provide a reference voltage proportional to a current limit value.
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公开(公告)号：US12034378B2
公开(公告)日：2024-07-09
申请号：US17985190
申请日：2022-11-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Orlando Lazaro , Yogesh Kumar Ramadass , Nan Xing
CPC classification number: H02M7/4835 , H02M3/07 , H02M1/0095
Abstract: A method includes charging a capacitor of a power inverter to a direct current (DC) input voltage from an input terminal of the power inverter. The capacitor has first and second terminals. The method also includes providing a first voltage at an output terminal of the power inverter at a first time by controlling one of either: an output switch that selectively couples the output terminal to either the first terminal or the second terminal; or a set of input switches that selectively couple the first and second terminals to either the input terminal or a ground terminal. The method further includes providing a second voltage at the output terminal at a second time by controlling the other of the output switch or the set of input switches.
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公开(公告)号：US20240079958A1
公开(公告)日：2024-03-07
申请号：US18506337
申请日：2023-11-10
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ashish Kumar , Haoquan Zhang , Yogesh Kumar Ramadass
Abstract: In one example, an apparatus comprises: a primary side bridge coupled between a power input and a first ground terminal, the primary side bridge having first switching terminals coupled to first capacitor terminals; and a secondary side bridge coupled between a power output and a second ground terminal, the secondary side bridge having second switching terminals coupled to second capacitor terminals.
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