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公开(公告)号：US10212500B2
公开(公告)日：2019-02-19
申请号：US15418395
申请日：2017-01-27
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Girault W. Jones , Nathan A. Johanningsmeier
Abstract: An analog to digital conversion circuit receives a transducer output signal and outputs a data bitstream, where a latch or flip flop has an input that receives a clock signal. An AC-DC power converter receives the clock signal and produces a DC voltage which may power the analog to digital conversion circuit. The AC-DC power converter has a rectifier, an energy store and a voltage regulator, charge pump or filter, which draws power from the energy store to produce the DC voltage. A control circuit delays replenishment of the energy store by the rectified clock signal, responsive to the clock signal. Other embodiments are also described and claimed.
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公开(公告)号：US20180220214A1
公开(公告)日：2018-08-02
申请号：US15418395
申请日：2017-01-27
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Girault W. Jones , Nathan A. Johanningsmeier
Abstract: An analog to digital conversion circuit receives a transducer output signal and outputs a data bitstream, where a latch or flip flop has an input that receives a clock signal. An AC-DC power converter receives the clock signal and produces a DC voltage which may power the analog to digital conversion circuit. The AC-DC power converter has a rectifier, an energy store and a voltage regulator, charge pump or filter, which draws power from the energy store to produce the DC voltage. A control circuit delays replenishment of the energy store by the rectified clock signal, responsive to the clock signal. Other embodiments are also described and claimed.
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公开(公告)号：US20180038834A1
公开(公告)日：2018-02-08
申请号：US15417962
申请日：2017-01-27
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Nathan A. Johanningsmeier
Abstract: An excitation signal is produced on a plate of an unknown capacitor and on a plate of a known capacitor. The excitation signal is amplified over time to produce a first output signal, with gain that is proportional to capacitance of the unknown capacitor. The excitation signal is also amplified over time to produce a second output signal, with gain that is proportional to capacitance of the known capacitor. Capacitance of the unknown capacitor is computed using a mathematical function of the first and second output signals and the capacitance of the known capacitor, while being insensitive to amplitude of the excitation signal. Other embodiments are also described and claimed.
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Patent Agency Ranking
公开(公告)号：US09847713B2
公开(公告)日：2017-12-19
申请号：US15070508
申请日：2016-03-15
Applicant: Apple Inc.
Inventor： David C. Breece, III , Roderick B. Hogan , Nathan A. Johanningsmeier
CPC classification number: H02M3/07 , H02M2003/071 , H03F1/0261 , H03F3/183 , H03F3/19 , H03F3/3432 , H03F2200/03
Abstract: A charge pump circuit having first and second input nodes to be coupled to a first power source, and top and bottom output nodes and an intermediate node. The charge pump circuit produces i) a voltage at the top output node that is higher than a voltage of the intermediate node, and ii) a voltage at the bottom output node that is lower than the voltage of the intermediate node. A bias voltage source has i) an input that is to be coupled to a second power source and ii) an output that produces an output voltage, which is a predetermined proportion of an input voltage at the input and that follows the input voltage downward and upward as the input voltage sags and recovers, respectively. The output of the bias voltage source is directly connected to the intermediate node of the output stage. Other embodiments are also described.
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25.发明授权Multi-channel audio system having a shared current sense element for estimating individual speaker impedances using test signals 有权具有用于使用测试信号估计各个扬声器阻抗的共享电流检测元件的多通道音频系统公开(公告)号：US09332343B2
公开(公告)日：2016-05-03
申请号：US14252472
申请日：2014-04-14
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Nathan A. Johanningsmeier
CPC classification number: H04R3/00 , H04R3/007 , H04R29/00 , H04R29/001
Abstract: A programmed data processor obtains a number of input voltage measurements for a number of speaker drivers, respectively, and a sensed shared current being a measure of current in a single power supply rail that is feeding power to each of a number of audio amplifiers while the audio amplifiers are driving the speaker drivers in accordance with a number of audio channel test signals, respectively. The programmed data processor computes an estimate of electrical input impedance of each of the speaker drivers using the input voltage measurement for the speaker driver and using the sensed shared current. Other embodiments are also described and claimed.
Abstract translation: 编程数据处理器分别为多个扬声器驱动器获得多个输入电压测量值，并且感测到的共享电流是单个电源轨道中的电流测量，该电源轨道将功率馈送到多个音频放大器中的每一个，同时 音频放大器分别根据多个音频通道测试信号驱动扬声器驱动器。 编程数据处理器使用扬声器驱动器的输入电压测量并使用感测到的共享电流来计算每个扬声器驱动器的电输入阻抗的估计。 还描述和要求保护其他实施例。
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26.发明授权Multi-channel audio system having a shared current sense element for estimating individual speaker impedances 有权具有用于估计各个扬声器阻抗的共享电流检测元件的多声道音频系统公开(公告)号：US09247345B2
公开(公告)日：2016-01-26
申请号：US14252461
申请日：2014-04-14
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Nathan A. Johanningsmeier
CPC classification number: H04R29/001 , H04R3/12
Abstract: A programmed data processor receives input voltage measurements for a number of speaker drivers, wherein each of the voltage measurements may be a sensed or estimated sequence of time-domain samples of a respective speaker driver input voltage that is over a different time frame. The processor obtains a sensed shared current, being a measure of current in a single power supply rail that is feeding power to each of a number of audio amplifiers, while the audio amplifiers are driving the speaker drivers in accordance with a number of audio channel signals, respectively. The processor computes an estimate of electrical input impedance for each of the speaker drivers using the sensed shared current and the input voltage measurements. Other embodiments are also described and claimed.
Abstract translation: 编程数据处理器接收多个扬声器驱动器的输入电压测量值，其中每个电压测量可以是在不同时间帧上的相应扬声器驱动器输入电压的感测或估计的时域样本序列。 处理器获得感测到的共享电流，其是在单个电源轨中的电流测量，该电源轨正在向多个音频放大器中的每一个供电，同时音频放大器根据多个音频通道信号驱动扬声器驱动器 ， 分别。 处理器使用感测到的共享电流和输入电压测量来计算每个扬声器驱动器的电输入阻抗的估计。 还描述和要求保护其他实施例。
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公开(公告)号：US08942410B2
公开(公告)日：2015-01-27
申请号：US13731973
申请日：2012-12-31
Applicant: Apple Inc.
Inventor： Christopher R. Wilk , Martin E. Johnson , Patrick Kessler , Nathan A. Johanningsmeier
CPC classification number: H04R9/025 , H04R2499/11
Abstract: An electronic device having an enclosure having a top panel and a bottom panel. An electromagnet is mounted within the enclosure, the electromagnet having a core portion attached to the top panel and a coil connected to the core portion. An attractor plate is attached to the bottom panel, the attractor plate forming part of a magnetic circuit of the electromagnet such that when an electrical audio signal is applied to the electromagnet, the bottom panel vibrates and produces a sound. A permanent magnet is further attached to the core portion, the permanent magnet is configured to create a bias in the magnetic circuit so as to modify a distortion in the sound.
Abstract translation: 一种具有外壳的电子设备，其具有顶板和底板。 电磁铁安装在外壳内，电磁铁具有连接到顶板的芯部和连接到芯部的线圈。 吸引板附接到底板，吸引板形成电磁体的磁路的一部分，使得当电磁音频信号被施加到电磁体时，底板振动并产生声音。 永久磁铁进一步附着于芯部，永久磁铁被配置为在磁路中产生偏置，以便改变声音的失真。
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公开(公告)号：US20140185859A1
公开(公告)日：2014-07-03
申请号：US13731973
申请日：2012-12-31
Applicant: APPLE INC.
Inventor： Christopher R. Wilk , Martin E. Johnson , Patrick Kessler , Nathan A. Johanningsmeier
IPC: H04R9/02
CPC classification number: H04R9/025 , H04R2499/11
Abstract: An electronic device having an enclosure having a top panel and a bottom panel. An electromagnet is mounted within the enclosure, the electromagnet having a core portion attached to the top panel and a coil connected to the core portion. An attractor plate is attached to the bottom panel, the attractor plate forming part of a magnetic circuit of the electromagnet such that when an electrical audio signal is applied to the electromagnet, the bottom panel vibrates and produces a sound. A permanent magnet is further attached to the core portion, the permanent magnet is configured to create a bias in the magnetic circuit so as to modify a distortion in the sound.
Abstract translation: 一种具有外壳的电子设备，其具有顶板和底板。 电磁铁安装在外壳内，电磁铁具有连接到顶板的芯部和连接到芯部的线圈。 吸引板附接到底板，吸引板形成电磁体的磁路的一部分，使得当电磁音频信号被施加到电磁体时，底板振动并产生声音。 永久磁铁进一步附着于芯部，永久磁铁被配置为在磁路中产生偏置，以便改变声音的失真。
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