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1.发明授权公开(公告)号：US10917050B2
公开(公告)日：2021-02-09
申请号：US16194039
申请日：2018-11-16
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Evan D Ragsdale , Kavitha Srinivasan
Abstract: A power converter produces power at a greater voltage than provided by a power source, while drawing power from the power source, wherein the power converter has a variable input current limit or a variable input power limit. One or more audio amplifiers are configured into i) drawing power from the power source bypassing the power converter and ii) drawing power from the power converter, according to audio signal amplitude, during audio playback and in accordance with an audio signal being amplified. A load of each amplifier is determined for when the amplifier is drawing power from the power source bypassing the power converter. The variable input limit of the power converter is adjusted in accordance with the determined load, during the audio playback. Other aspects are also described and claimed.
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公开(公告)号：US09967664B1
公开(公告)日：2018-05-08
申请号：US15601931
申请日：2017-05-22
Applicant: Apple Inc.
Inventor： Yang Boon Quek , Scott P. Porter , Roderick B. Hogan , Hongdan Tao , Suzanne C. Brown , Christopher Wilk , Nathan A. Johanningsmeier
CPC classification number: H04R3/007 , G01K7/00 , G01S17/08 , H04R9/025 , H04R9/06 , H04R23/008 , H04R29/001 , H04R2499/11 , H04R2499/15
Abstract: A micro speaker assembly including a micro speaker having a top plate, a bottom plate parallel to the top plate, a magnet assembly coupled to one of the top plate or the bottom plate, a compliant member positioned between the magnet assembly and the top plate or the bottom plate, the compliant member operable to be displaced in response to an acoustic input, and a voice coil coupled to the compliant member. The assembly further including an optical sensor coupled to the micro speaker, the optical sensor having a light emitter and a light detector, the light emitter and the light detector being fixedly coupled to the top plate or the bottom plate, and the optical sensor being operable to produce a displacement signal corresponding to a displacement of the compliant member and a temperature signal corresponding to a temperature of the magnet assembly.
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公开(公告)号：US20160241957A1
公开(公告)日：2016-08-18
申请号：US14839228
申请日：2015-08-28
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Scott P. Porter , Ruchir M. Dave
IPC: H04R3/00
Abstract: A common plate is formed in a moveable element of a device, the device having an actuator coupled to drive the moveable element. A first plate and the common plate together form a first capacitance, while a second plate and the common plate together form a second capacitance, both of which varies as a function of displacement of the moveable element. A measurement circuit has an input coupled to the first plate, while an excitation voltage source has an output coupled to the second plate. A guard voltage source has an output coupled to a conductive portion of the device. Other embodiments are also described and claimed.
Abstract translation: 公共板形成在装置的可移动元件中，该装置具有联接以驱动可移动元件的致动器。 第一板和公共板一起形成第一电容，而第二板和公共板一起形成第二电容，两者均作为可移动元件的位移的函数而变化。 测量电路具有耦合到第一板的输入，而激励电压源具有耦合到第二板的输出。 保护电压源具有耦合到该器件的导电部分的输出。 还描述和要求保护其他实施例。
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公开(公告)号：US11166106B2
公开(公告)日：2021-11-02
申请号：US16889630
申请日：2020-06-01
Applicant: Apple Inc.
Inventor： Michael B. Nussbaum , Roderick B. Hogan , Todd K. Moyer
IPC: H04R9/06 , H03F3/217 , H03K19/094 , H04R1/10 , H03K5/156
Abstract: A hearable has an audio amplifier circuit coupled to a speaker as a load. The amplifier circuit has current source drive, which attenuates electromagnetically coupled noise of the speaker. In other instances, the amplifier circuit has a first amplifier mode and a second amplifier mode, wherein in the first amplifier mode the amplifier circuit becomes configured to drive the speaker as a voltage source, and in the second amplifier mode the amplifier circuit becomes configured to drive the speaker as a current source. Control logic varies the amplifier circuit between i) the first amplifier mode for larger amplitudes of the audio signal, and ii) the second amplifier mode for smaller amplitudes of the audio signal. Other aspects are also described and claimed.
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公开(公告)号：US09826308B2
公开(公告)日：2017-11-21
申请号：US14839228
申请日：2015-08-28
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Scott P. Porter , Ruchir M. Dave
Abstract: A common plate is formed in a moveable element of a device, the device having an actuator coupled to drive the moveable element. A first plate and the common plate together form a first capacitance, while a second plate and the common plate together form a second capacitance, both of which varies as a function of displacement of the moveable element. A measurement circuit has an input coupled to the first plate, while an excitation voltage source has an output coupled to the second plate. A guard voltage source has an output coupled to a conductive portion of the device. Other embodiments are also described and claimed.
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Patent Agency Ranking
公开(公告)号：US20150382104A1
公开(公告)日：2015-12-31
申请号：US14315863
申请日：2014-06-26
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Girault W. Jones , Nathan A. Johanningsmeier
IPC: H04R3/00
CPC classification number: H04R3/00 , H04R2420/09 , H04R2499/13
Abstract: A method for audio signal processing, where an audio amplifier drives a load through a connector, using 1) an input audio signal, and 2) a signal from a return pin of the connector. Output headroom of the audio amplifier is automatically detected, while the amplifier is driving the load. A variable resistor circuit that is coupled to provide variable resistance between the return pin of the connector and a ground plane, is automatically adjusted, in response to the detected output headroom of the amplifier. Other embodiments are also described and claimed.
Abstract translation: 一种用于音频信号处理的方法，其中音频放大器通过连接器驱动负载，使用1）输入音频信号，以及2）来自所述连接器的返回引脚的信号。 当放大器驱动负载时，自动检测音频放大器的输出净空。 响应于检测到的放大器的输出净空，自动调整耦合以提供连接器的返回引脚和接地平面之间的可变电阻的可变电阻器电路。 还描述和要求保护其他实施例。
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公开(公告)号：US20150349464A1
公开(公告)日：2015-12-03
申请号：US14641276
申请日：2015-03-06
Applicant: APPLE INC.
Inventor： Roderick B. Hogan , Joseph C. Curcio , Nathan Johanningsmeier
IPC: H01R13/6471 , H01R24/58
CPC classification number: H01R13/7039 , H01R24/58 , H01R2107/00 , H04R1/1041 , H04R2420/05 , H04R2420/09
Abstract: An audio jack may include two contacts to electrically connect to a ground contact of an audio plug in order to detect that a metallic audio plug is inserted into the audio jack. A first of these two contacts may be grounded to form a current return path that generates a ground voltage at the ground contact of the audio plug. The second of these two contacts may be repurposed after the detection to sense the ground voltage. The sensed ground voltage may be added to right and left audio signals. The net voltages provided to the audio plug may be right and left audio signals that include the sensed ground voltage minus the actual ground voltage at the ground contact of the audio plug. This may remove the ground voltage from the net audio output signals, which may reduce crosstalk.
Abstract translation: 音频插孔可以包括两个触点，以电连接到音频插头的接地触点，以便检测金属音频插头插入到音频插孔中。 这两个触点中的第一个可以接地以形成在音频插头的接地触点处产生接地电压的电流返回路径。 这两个触点中的第二个可以在检测到之后重新利用以检测接地电压。 感测的接地电压可以被添加到右和左音频信号。 提供给音频插头的净电压可以是包括感测到的接地电压减去音频插头的接地触点的实际接地电压的右和左音频信号。 这可能会从网络音频输出信号中消除接地电压，这可能会降低串扰。
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8.发明申请MULTI-CHANNEL AUDIO SYSTEM HAVING A SHARED CURRENT SENSE ELEMENT FOR ESTIMATING INDIVIDUAL SPEAKER IMPEDANCES 有权具有用于估计个人扬声器影响的共享电流感应元件的多声道音频系统公开(公告)号：US20150296292A1
公开(公告)日：2015-10-15
申请号：US14252461
申请日：2014-04-14
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Nathan A. Johanningsmeier
IPC: H04R3/00
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：US20200351593A1
公开(公告)日：2020-11-05
申请号：US16889630
申请日：2020-06-01
Applicant: Apple Inc.
Inventor： Michael B. Nussbaum , Roderick B. Hogan , Todd K. Moyer
IPC: H04R9/06 , H03F3/217 , H03K19/094 , H04R1/10 , H03K5/156
Abstract: A hearable has an audio amplifier circuit coupled to a speaker as a load. The amplifier circuit has current source drive, which attenuates electromagnetically coupled noise of the speaker. In other instances, the amplifier circuit has a first amplifier mode and a second amplifier mode, wherein in the first amplifier mode the amplifier circuit becomes configured to drive the speaker as a voltage source, and in the second amplifier mode the amplifier circuit becomes configured to drive the speaker as a current source. Control logic varies the amplifier circuit between i) the first amplifier mode for larger amplitudes of the audio signal, and ii) the second amplifier mode for smaller amplitudes of the audio signal. Other aspects are also described and claimed.
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公开(公告)号：US20200106406A1
公开(公告)日：2020-04-02
申请号：US16195546
申请日：2018-11-19
Applicant: Apple Inc.
Inventor： Roderick B. Hogan , Troy A. Murphy , Nathan A. Johanningsmeier
Abstract: An audio amplifier has a first H bridge and a second H bridge, to drive a speaker as a load. The second H bridge drives the speaker through resistors for increased output impedance. Control logic operates the first H bridge as a class D amplifier for larger amplitudes of audio signal, and operates the second H bridge as a class D amplifier for smaller amplitudes of audio signal. Other aspects are also described and claimed.
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