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公开(公告)号：US20190131931A1
公开(公告)日：2019-05-02
申请号：US16119115
申请日：2018-08-31
Applicant: NXP B.V.
Inventor： Maarten van Dommelen , Frédéric Chalet , Benno Krabbenborg
CPC classification number: H03F1/0205 , H03F1/0227 , H03F3/181 , H03F3/183 , H03F3/217 , H03F2200/03 , H03F2200/102 , H03F2200/321 , H03K5/133 , H03K2005/00241 , H04R3/00
Abstract: A method and operates for generating a boost control signal for a DC-DC-booster is described. An audio signal may be received comprising a plurality of audio sample values. The audio signal may be delayed for a delay time. A maximum-delayed-value of the audio sample values during the delay time may be determined. The boost control signal may be generated from the maximum of the non-delayed audio signal sample value and the maximum-delayed-value.
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Patent Agency Ranking
公开(公告)号：US20140340147A1
公开(公告)日：2014-11-20
申请号：US14258687
申请日：2014-04-22
Applicant: NXP B.V.
Inventor： Han Martijn Schuurmans , Maarten van Dommelen
CPC classification number: H03G3/301 , G07C9/00309 , G07C9/00571 , G07C2009/00634 , G07C2009/00777 , G07C2009/00793 , H03F1/305 , H03F3/187 , H03F3/2171 , H03F3/45 , H03F3/45071 , H03F3/45973 , H03F2200/03 , H03F2203/45528 , H03F2203/45588
Abstract: A true ground amplifier circuit in which a voltage sensor senses the output voltage and generates a binary output which indicates whether the output is above or below a threshold. A variable gain feedback system generates a feedback signal for combination with the digital input, thereby to provide offset cancellation. The variable gain is reduced over time to provide offset cancellation during an initial period of time of operation of the amplifier circuit. This provides offset cancellation during a start-up period, for example.
Abstract translation: 一种真正的地面放大器电路，其中电压传感器感测输出电压并产生指示输出是否高于或低于阈值的二进制输出。 可变增益反馈系统产生用于与数字输入组合的反馈信号，从而提供抵消消除。 随着时间的推移，可变增益被减小以在放大器电路的初始操作时间期间提供偏移消除。 例如，这在启动期间提供偏移消除。
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公开(公告)号：US10008994B2
公开(公告)日：2018-06-26
申请号：US15480645
申请日：2017-04-06
Applicant: NXP B.V.
Inventor： Marco Berkhout , Lûtsen Ludgerus Albertus Hendrikus Dooper , Maarten van Dommelen , Han Martijn Schuurmans
CPC classification number: H03G3/3015 , H03F1/0227 , H03F1/26 , H03F3/185 , H03F3/217 , H03F3/2175 , H03F2200/03 , H03F2200/102 , H03F2200/351 , H03F2200/372 , H03G3/3089 , H03M3/506
Abstract: An audio amplifier system is described comprising: a variable gain audio processor for processing digital audio signal, a digital to analog converter coupled to the audio processor, and configured to receive the processed digital audio signal, a variable gain amplifier having an input coupled to the output of the digital to analog converter and operably connected to a power supply, a controller coupled to the variable gain audio processor and the variable gain amplifier and configured to switch the audio amplifier system between a first operating mode having a first power supply voltage value and a second operating mode having a second higher power supply voltage value; wherein the controller is operable in the first operating mode to set the audio amplifier system gain to a desired gain value and in the second operating mode to maintain the desired gain value.
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公开(公告)号：US09154098B2
公开(公告)日：2015-10-06
申请号：US14258687
申请日：2014-04-22
Applicant: NXP B.V.
Inventor： Han Martijn Schuurmans , Maarten van Dommelen
CPC classification number: H03G3/301 , G07C9/00309 , G07C9/00571 , G07C2009/00634 , G07C2009/00777 , G07C2009/00793 , H03F1/305 , H03F3/187 , H03F3/2171 , H03F3/45 , H03F3/45071 , H03F3/45973 , H03F2200/03 , H03F2203/45528 , H03F2203/45588
Abstract: A true ground amplifier circuit in which a voltage sensor senses the output voltage and generates a binary output which indicates whether the output is above or below a threshold. A variable gain feedback system generates a feedback signal for combination with the digital input, thereby to provide offset cancellation. The variable gain is reduced over time to provide offset cancellation during an initial period of time of operation of the amplifier circuit. This provides offset cancellation during a start-up period, for example.
Abstract translation: 一种真正的地面放大器电路，其中电压传感器感测输出电压并产生指示输出是否高于或低于阈值的二进制输出。 可变增益反馈系统产生用于与数字输入组合的反馈信号，从而提供抵消消除。 随着时间的推移，可变增益被减小以在放大器电路的初始操作时间期间提供偏移消除。 例如，这在启动期间提供偏移消除。
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公开(公告)号：US10454424B2
公开(公告)日：2019-10-22
申请号：US16119115
申请日：2018-08-31
Applicant: NXP B.V.
Inventor： Maarten van Dommelen , Frédéric Chalet , Benno Krabbenborg
Abstract: A method and operates for generating a boost control signal for a DC-DC-booster is described. An audio signal may be received comprising a plurality of audio sample values. The audio signal may be delayed for a delay time. A maximum-delayed-value of the audio sample values during the delay time may be determined. The boost control signal may be generated from the maximum of the non-delayed audio signal sample value and the maximum-delayed-value.
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公开(公告)号：US20170294888A1
公开(公告)日：2017-10-12
申请号：US15480645
申请日：2017-04-06
Applicant: NXP B.V.
Inventor： Marco Berkhout , Lûtsen Ludgerus Albertus Hendrikus Dooper , Maarten van Dommelen , Han Martijn Schuurmans
CPC classification number: H03G3/3015 , H03F1/0227 , H03F1/26 , H03F3/185 , H03F3/217 , H03F3/2175 , H03F2200/03 , H03F2200/102 , H03F2200/351 , H03F2200/372 , H03G3/3089 , H03M3/506
Abstract: An audio amplifier system is described comprising: a variable gain audio processor for processing digital audio signal, a digital to analog converter coupled to the audio processor, and configured to receive the processed digital audio signal, a variable gain amplifier having an input coupled to the output of the digital to analog converter and operably connected to a power supply, a controller coupled to the variable gain audio processor and the variable gain amplifier and configured to switch the audio amplifier system between a first operating mode having a first power supply voltage value and a second operating mode having a second higher power supply voltage value; wherein the controller is operable in the first operating mode to set the audio amplifier system gain to a desired gain value and in the second operating mode to maintain the desired gain value.
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