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公开(公告)号：US09912312B2
公开(公告)日：2018-03-06
申请号：US14182850
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Gautham Kamath , John Christopher Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: A controller of a boost converter may be configured to dynamically adjust conditions within the boost converter by monitoring conditions in the boost converter. For example, the controller may determine an current inductance value for an inductor of the boost converter by monitoring a current through the inductor. When the inductance value of the inductor is known, a slope compensation value may be used in determining a transition time between charging the inductor of the boost converter and discharging the inductor.
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公开(公告)号：US09673762B2
公开(公告)日：2017-06-06
申请号：US14920698
申请日：2015-10-22
Applicant: Cirrus Logic, Inc.
Inventor： Lingli Zhang , Huan Wang , Yongjie Cheng , Christian Larsen
CPC classification number: H03F3/185 , H03F1/0205 , H03F1/305 , H03F3/2171 , H03F2200/03 , H03F2200/351 , H03F2200/375
Abstract: A variable ramp up/down gain in a pre-power stage block of an audio amplifier may be used to reduce audible pops and clicks output by the audio amplifier. A controller may adjust the variable ramp up/down gain during operation of the audio amplifier. The variable ramp up/down gain may be implemented as a pulse width modulation (PWM) modulator/generator with a ramp-up and ramp-down gain under control of the controller. The variable ramp up/down gain smooths transitions of the offset between a pre-power stage block and a feedback loop and thus can reduce audible pops and clicks by reducing the offset that is amplified in the power stage block of the audio amplifier.
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公开(公告)号：US08970258B2
公开(公告)日：2015-03-03
申请号：US13830047
申请日：2013-03-14
Applicant: Cirrus Logic, Inc.
Inventor： Dan Shen , Johann Gaboriau , Lingli Zhang , Christian Larsen
CPC classification number: H02M1/08
Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node.
Abstract translation: 根据本公开的实施例，系统和方法可以包括在其栅极端子处耦合到输入信号电压的开关，用于控制耦合在其非门的驱动器件的栅极端子的栅极电压的输入信号电压 轨道电压和输出节点之间的端子。 系统和方法还可以包括具有第一端子和第二端子的二极管，二极管耦合到开关的非栅极端子，使得当开关被使能时，第一端子电连接到开关的栅极端子 驱动器装置和第二端子电耦合到输出节点。
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公开(公告)号：US09912238B1
公开(公告)日：2018-03-06
申请号：US14182939
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Gautham D. Kamath , John Christopher Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: During operation of a boost converter conditions may exist that result in a reverse current through the boost converter, such as when a load drop from the boost converter occurs. During the reverse current period, inductance value determinations made during a forward current period may be used to estimate a magnitude of the reverse current and this estimate used by a controller to control the boost converter and return the boost converter to normal operation. The controller may control the boost converter by changing a ratio of charging and discharging time for an inductor of the boost converter, decreasing a bandwidth of the boost converter, and/or increasing a resistance of the boost converter.
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公开(公告)号：US09520782B2
公开(公告)日：2016-12-13
申请号：US14182798
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham Kamath , John Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。
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Patent Agency Ranking
6.发明申请AMPLIFIER WITH ADJUSTABLE RAMP UP/DOWN GAIN FOR MINIMIZING OR ELIMINATING POP NOISE 有权具有可调节RAMP UP / DOWN增益的放大器，用于最小化或消除POP噪声公开(公告)号：US20160118949A1
公开(公告)日：2016-04-28
申请号：US14920698
申请日：2015-10-22
Applicant: Cirrus Logic, Inc.
Inventor： Lingli Zhang , Huan Wang , Yongjie Cheng , Christian Larsen
CPC classification number: H03F3/185 , H03F1/0205 , H03F1/305 , H03F3/2171 , H03F2200/03 , H03F2200/351 , H03F2200/375
Abstract: A variable ramp up/down gain in a pre-power stage block of an audio amplifier may be used to reduce audible pops and clicks output by the audio amplifier. A controller may adjust the variable ramp up/down gain during operation of the audio amplifier. The variable ramp up/down gain may be implemented as a pulse width modulation (PWM) modulator/generator with a ramp-up and ramp-down gain under control of the controller. The variable ramp up/down gain smooths transitions of the offset between a pre-power stage block and a feedback loop and thus can reduce audible pops and clicks by reducing the offset that is amplified in the power stage block of the audio amplifier.
Abstract translation: 可以使用音频放大器的功率前级块中的可变斜坡上升/下降增益来减少由音频放大器输出的声音弹出和喀哒声。 控制器可以在音频放大器的操作期间调节可变斜坡上升/下降增益。 可变斜坡上升/下降增益可以实现为在控制器的控制下具有斜升和斜降增益的脉宽调制（PWM）调制器/发生器。 可变斜坡上升/下降增益平滑了功率前级块和反馈回路之间的偏移的转换，并且因此可以通过减小在音频放大器的功率级块中放大的偏移来减少可听见的声音和咔嗒声。
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公开(公告)号：US20140266126A1
公开(公告)日：2014-09-18
申请号：US13830047
申请日：2013-03-14
Applicant: CIRRUS LOGIC, INC.
Inventor： Dan Shen , Johann Gaboriau , Lingli Zhang , Christian Larsen
IPC: H02M1/08
CPC classification number: H02M1/08
Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node.
Abstract translation: 根据本公开的实施例，系统和方法可以包括在其栅极端子处耦合到输入信号电压的开关，用于控制耦合在其非门的驱动器件的栅极端子的栅极电压的输入信号电压 轨道电压和输出节点之间的端子。 系统和方法还可以包括具有第一端子和第二端子的二极管，二极管耦合到开关的非栅极端子，使得当开关被使能时，第一端子电连接到开关的栅极端子 驱动器装置和第二端子电耦合到输出节点。
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公开(公告)号：US20170063318A1
公开(公告)日：2017-03-02
申请号：US15350431
申请日：2016-11-14
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham D. Kamath , John C. Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。
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公开(公告)号：US20150030183A1
公开(公告)日：2015-01-29
申请号：US14182798
申请日：2014-02-18
Applicant: CIRRUS LOGIC, INC.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham Kamath , John Tucker , Christian Larsen
IPC: H03G3/00
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。
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公开(公告)号：US09742370B2
公开(公告)日：2017-08-22
申请号：US15350431
申请日：2016-11-14
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham D. Kamath , John C. Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
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