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公开(公告)号：US20180176683A1
公开(公告)日：2018-06-21
申请号：US15897177
申请日：2018-02-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lars Risbo , Ryan Erik Lind , Jasjot Singh Chadha
CPC classification number: H04R3/02 , H03F3/185 , H03F3/2173 , H03F3/3022 , H03F3/45192 , H03F2200/03 , H03F2200/351 , H03F2200/411 , H04R3/00
Abstract: A system includes a class D amplifier and a current steering digital-to-analog converter (DAC) directly connected to the class D amplifier. The system also includes a common mode servo circuit coupled to a node interconnecting the current steering DAC to the class D amplifier. The common servo circuit amplifies a difference between a common mode signal determined from the node and a reference voltage and generates a feedback current to the node based on the amplified difference. A feed-forward common-mode compensation circuit is included to reduce an alternating current (AC) ripple from the class D amplifier. The feed-forward common-mode compensation circuit includes first and second resistors coupled to respective outputs of the class D amplifier. A current mirror is coupled to the first and second resistors and is configured to sink a current from the node to ground that approximates a common mode feedback current of the class D amplifier.
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公开(公告)号：US10158942B2
公开(公告)日：2018-12-18
申请号：US15897177
申请日：2018-02-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lars Risbo , Ryan Erik Lind , Jasjot Singh Chadha
Abstract: A system includes a class D amplifier and a current steering digital-to-analog converter (DAC) directly connected to the class D amplifier. The system also includes a common mode servo circuit coupled to a node interconnecting the current steering DAC to the class D amplifier. The common servo circuit amplifies a difference between a common mode signal determined from the node and a reference voltage and generates a feedback current to the node based on the amplified difference. A feed-forward common-mode compensation circuit is included to reduce an alternating current (AC) ripple from the class D amplifier. The feed-forward common-mode compensation circuit includes first and second resistors coupled to respective outputs of the class D amplifier. A current mirror is coupled to the first and second resistors and is configured to sink a current from the node to ground that approximates a common mode feedback current of the class D amplifier.
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公开(公告)号：US10397701B2
公开(公告)日：2019-08-27
申请号：US16175907
申请日：2018-10-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lars Risbo , Ryan Erik Lind , Jasjot Singh Chadha
Abstract: A system includes a class D amplifier and a current steering digital-to-analog converter (DAC) directly connected to the class D amplifier. The system also includes a common mode servo circuit coupled to a node interconnecting the current steering DAC to the class D amplifier. The common servo circuit amplifies a difference between a common mode signal determined from the node and a reference voltage and generates a feedback current to the node based on the amplified difference. A feed-forward common-mode compensation circuit is included to reduce an alternating current (AC) ripple from the class D amplifier. The feed-forward common-mode compensation circuit includes first and second resistors coupled to respective outputs of the class D amplifier. A current mirror is coupled to the first and second resistors and is configured to sink a current from the node to ground that approximates a common mode feedback current of the class D amplifier.
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公开(公告)号：US20190115765A1
公开(公告)日：2019-04-18
申请号：US16039321
申请日：2018-07-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zheren Lai , Jinrong Qian , Sai Bun Wong , Ryan Erik Lind , Alexander Lee McHale
Abstract: A system for charging a battery includes an adapter, and a charger coupled to receive power from the adapter, and to provide a charging current to the battery. The charger includes a power stage with a charge pump to provide the charging current, and a feedback circuit to provide a feedback signal to the adapter. The power stage can be one of: an adjustable current source with voltage clamp, and an adjustable voltage source with current clamp. The charge pump can be implemented as a voltage divider, so that an input adapter current is multiplied by a pre-defined divider ratio to provide the charging current. The charge pump can be one of: single-phase; and multi-phase.
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公开(公告)号：US11152861B2
公开(公告)日：2021-10-19
申请号：US16880452
申请日：2020-05-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Wenliang Chen , Reza Sharifi , Byron Mitchell Reed , Jairo Daniel Olivares , Ryan Erik Lind
Abstract: This disclosure relates to a multiphase converter design with multi-path phase management circuit and output logic. The phase management circuit and output logic can be employed to implement phase adding and shedding operations based on input and output current information and based on control signals for a power stage of the converter. In some examples, the design employs an estimate of an average output current based on a current at an input of the converter for phase control. In additional examples, the design employs cycle-by-cycle current limit and maximum duty-cycle signals to enable phase quickly during load transient. In further examples, the design employs low input and output-current sensed signals for efficient phase shedding and power saving. The design herein improves an overall accuracy of phase adding and shedding, load transient response performance, an operational efficiency and thermal performance of multiphase converter.
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Patent Agency Ranking
公开(公告)号：US11079779B2
公开(公告)日：2021-08-03
申请号：US16540808
申请日：2019-08-14
Applicant: Texas Instruments Incorporated
Inventor： Ryan Erik Lind
IPC: H03F1/46 , G05F1/46 , H03F3/45 , H03F1/02 , H02M1/00 , G05F1/575 , G05F1/56 , H02M3/04 , H02M7/04
Abstract: One example includes a transconductor system. The system includes a first transconductance amplifier that generates a control current in response to a first input voltage. The system also includes a second transconductance amplifier that generates an output signal in response to a second input voltage. The system further includes an intermediate amplifier that generates a control voltage in response to the control current and a third input voltage. The control voltage can be provided to the first and second transconductance amplifiers to set a transconductance of each of the first and second transconductance amplifiers to be approximately equal.
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公开(公告)号：US20200266634A9
公开(公告)日：2020-08-20
申请号：US16039321
申请日：2018-07-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zheren Lai , Jinrong Qian , Sai Bun Wong , Ryan Erik Lind , Alexander Lee McHale
Abstract: A system for charging a battery includes an adapter, and a charger coupled to receive power from the adapter, and to provide a charging current to the battery. The charger includes a power stage with a charge pump to provide the charging current, and a feedback circuit to provide a feedback signal to the adapter. The power stage can be one of: an adjustable current source with voltage clamp, and an adjustable voltage source with current clamp. The charge pump can be implemented as a voltage divider, so that an input adapter current is multiplied by a pre-defined divider ratio to provide the charging current. The charge pump can be one of: single-phase; and multi-phase.
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公开(公告)号：US10199999B1
公开(公告)日：2019-02-05
申请号：US15808002
申请日：2017-11-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ryan Erik Lind
Abstract: One example includes a transconductor system. The system includes a first transconductance amplifier that generates a control current in response to a first input voltage. The system also includes a second transconductance amplifier that generates an output signal in response to a second input voltage. The system further includes an intermediate amplifier that generates a control voltage in response to the control current and a third input voltage. The control voltage can be provided to the first and second transconductance amplifiers to set a transconductance of each of the first and second transconductance amplifiers to be approximately equal.
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公开(公告)号：US11641126B2
公开(公告)日：2023-05-02
申请号：US16039321
申请日：2018-07-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zheren Lai , Jinrong Qian , Sai Bun Wong , Ryan Erik Lind , Alexander Lee McHale
Abstract: A system for charging a battery includes an adapter, and a charger coupled to receive power from the adapter, and to provide a charging current to the battery. The charger includes a power stage with a charge pump to provide the charging current, and a feedback circuit to provide a feedback signal to the adapter. The power stage can be one of: an adjustable current source with voltage clamp, and an adjustable voltage source with current clamp. The charge pump can be implemented as a voltage divider, so that an input adapter current is multiplied by a pre-defined divider ratio to provide the charging current. The charge pump can be one of: single-phase; and multi-phase.
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公开(公告)号：US11463005B2
公开(公告)日：2022-10-04
申请号：US16859467
申请日：2020-04-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Huijuan Li , Ronnie Antone Bean , Benjamin McCue , Ryan Erik Lind
Abstract: In some examples, a converter circuit can be configured to operate in a buck-boost mode. The converter circuit can include a ramp generator that can be configured to generate first and second ramp signals that at least partially overlap respective portions of a buck-boost region during each intermediate clock cycle between clock cycles of a clock signal. By generating the first and second ramp signals during each intermediate clock cycle, first and second drivers can be provided to toggle switches of a power stage, such that an output voltage provided by the power stage can be averaged out over clock cycles of the clock signal to allow for a gradual transition between buck and boost modes of operation of the converter circuit. In some examples, the converter circuit can be configured to operate in a test mode and can be configured to implement trimming of a ramp signal.
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