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公开(公告)号：US20230006628A1
公开(公告)日：2023-01-05
申请号：US17674141
申请日：2022-02-17
申请人： Kenichi OSHIMA
发明人： Kenichi OSHIMA
摘要： Equipment that can comfortably hear mixed large sound and small sound at the same time by earphones and headphones is achieved. Level of rise and fall of an input signal waveform is logarithmically compressed and output to limit wave height, and an output signal is taken out from a wave-height-limited signal by eliminating or attenuating harmonic distortion. A limiter 6 limits an amplitude of an input sound signal. The integrator 7 is connected to the output-side of the limiter 6 and logarithmically compresses rise or fall of an output signal waveform from the limiter 6.
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公开(公告)号：US20180152159A1
公开(公告)日：2018-05-31
申请号：US15880580
申请日：2018-01-26
申请人： Yamaha Corporation
发明人： Satoshi UKAI , Mikio MURAMATSU
摘要： A signal processing apparatus includes a level adjuster adjusting a level of an input signal, and a setter calculating an electric charge estimate value being a value obtained by estimating an electric charge amount of a charging and discharging element based on the charging and discharging element to which a predetermined electric charge is supplied and in which the electric charge is held and the electric charge supplied to the charging and discharging element and setting an adjustment coefficient of the level adjuster based on the electric charge estimate value.
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公开(公告)号：US09980068B2
公开(公告)日：2018-05-22
申请号：US14073324
申请日：2013-11-06
CPC分类号： H04R29/001 , H03F1/52 , H03F2200/462 , H03F2200/471 , H03G7/08 , H03G9/005 , H03G11/04 , H04R1/00 , H04R3/002 , H04R3/007 , H04R29/00 , H04R29/003
摘要： A method of estimating diaphragm excursion of an electrodynamic loudspeaker may be performed using audio signals. An audio output signal may be applied to a voice coil of the electrodynamic loudspeaker through an output amplifier to produce sound. A detected voice coil current and a determined voice coil voltage may be applied to a linear adaptive digital loudspeaker model that has a plurality of adaptive loudspeaker parameters. The parameter values of the adaptive loudspeaker parameters may be computed based on the linear adaptive digital loudspeaker model and applied to a non-linear state-space model of the electrodynamic loudspeaker. For the non-linear state-space model, a predetermined non-linear function may be applied to at least one of the plurality of received parameter values to compute at least one non-linearity compensated parameter value of the adaptive loudspeaker parameters, to determine an instantaneous excursion of the diaphragm.
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4.发明授权公开(公告)号：US09743182B2
公开(公告)日：2017-08-22
申请号：US15131940
申请日：2016-04-18
发明人： Jaimin Mehta , Stephen T. Hodapp
CPC分类号： H04R3/04 , H03G5/22 , H03G11/04 , H03H2017/0295 , H03H2210/01 , H04R3/007 , H04R19/005 , H04R19/04
摘要： A system may include control circuitry for detecting a plosive event associated with a microphone transducer and in response to the plosive event, causing restoration of acoustic sense operation of the microphone transducer and a processing circuit associated with the microphone transducer. A system for configuring a filter having at least two frequency response configurations to achieve an effective frequency response configuration intermediate to the at least two frequency response configurations may include control circuitry for rapidly switching between the at least two frequency response configurations such that a weighted average frequency response of the filter corresponds to the effective frequency response configuration.
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5.发明申请公开(公告)号：US20170180856A1
公开(公告)日：2017-06-22
申请号：US15131940
申请日：2016-04-18
发明人： Jaimin MEHTA , Stephen T. HODAPP
CPC分类号： H04R3/04 , H03G5/22 , H03G11/04 , H03H2017/0295 , H03H2210/01 , H04R3/007 , H04R19/005 , H04R19/04
摘要： A system may include control circuitry for detecting a plosive event associated with a microphone transducer and in response to the plosive event, causing restoration of acoustic sense operation of the microphone transducer and a processing circuit associated with the microphone transducer. A system for configuring a filter having at least two frequency response configurations to achieve an effective frequency response configuration intermediate to the at least two frequency response configurations may include control circuitry for rapidly switching between the at least two frequency response configurations such that a weighted average frequency response of the filter corresponds to the effective frequency response configuration.
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公开(公告)号：US20140266420A1
公开(公告)日：2014-09-18
申请号：US14214437
申请日：2014-03-14
申请人： DockOn AG
发明人： Forrest Brown , Patrick Rada , Alexandre Dupuy
CPC分类号： H01P5/19 , H01Q7/00 , H01Q21/0075 , H03D1/08 , H03D1/18 , H03D7/02 , H03D7/12 , H03D7/165 , H03D7/166 , H03D11/04 , H03D11/08 , H03D2200/0043 , H03D2200/0098 , H03F1/08 , H03F3/04 , H03F3/191 , H03F2200/165 , H03F2200/294 , H03G11/04
摘要： A logarithmic amplifier (LDA) is described that includes an amplifier configured to oscillate a modulated input signal, a feedback establishing a 180 degree phase shift between the amplifier input and the output and maintaining oscillation of the input signal, a parallel resonant circuit connected to the amplifier output causing the amplifier to resonate at or around a center frequency, and a controller connected to the amplifier input cyclically terminating oscillation of the input signal each time a pre-determined threshold of current is detected, the controller including a low pass filter configured to generate a second output signal having a repetition frequency. The LDA may be used for AM with or without a PLL and/or a superhetrodyne. The LDA may be implemented as a mixer and used for phase demodulation. The LDA may be used for phase demodulation. The LDA may be used in place of a low noise amplifier.
摘要翻译： 描述了对数放大器（LDA），其包括被配置为振荡调制输入信号的放大器，在放大器输入和输出之间建立180度相移并保持输入信号的振荡的反馈，并联谐振电路 放大器输出使得放大器在中心频率处或周围谐振，以及连接到放大器输入端的控制器，每当检测到电流的预定阈值时循环地终止输入信号的振荡，则控制器包括低通滤波器， 产生具有重复频率的第二输出信号。 LDA可用于具有或不具有PLL和/或超临界的AM。 LDA可以实现为混频器并用于相位解调。 LDA可用于相位解调。 可以使用LDA代替低噪声放大器。
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公开(公告)号：US20130033316A1
公开(公告)日：2013-02-07
申请号：US13552326
申请日：2012-07-18
申请人： Noboru Sasho , Naoto Yoshikawa
发明人： Noboru Sasho , Naoto Yoshikawa
CPC分类号： H03G1/0088 , H03G3/3036 , H03H11/245
摘要： An automatic step variable attenuator includes: a step variable attenuator attenuating a received signal of an electric wave signal in an attenuation amount corresponding to a control signal in a step-like style; a detector disposed in parallel with the step variable attenuator for input of the received signal of the electric wave signal, and converting an electric power of the received signal thus inputted into an intensity signal representing an intensity of the received signal; and a comparator portion generating the control signal corresponding to a result of comparison for differences between the intensity signal obtained from the detector and plural threshold values, and outputting the control signal thus generated to the step variable attenuator.
摘要翻译： 一种自动步进可变衰减器包括：步进可变衰减器，以阶梯状的方式衰减对应于控制信号的衰减量的电波信号的接收信号; 检测器，与所述阶跃式可变衰减器并联设置，用于输入所述电波信号的接收信号;以及将所输入的接收信号的电功率转换成表示所述接收信号强度的强度信号; 以及比较器部分，生成对应于从检测器获得的强度信号与多个阈值之间的差异的比较结果的控制信号，并将由此产生的控制信号输出到阶跃可变衰减器。
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公开(公告)号：US07515012B2
公开(公告)日：2009-04-07
申请号：US11360307
申请日：2006-02-22
发明人： Martin J. Vogel
CPC分类号： A61N1/3787 , A61N1/37229 , H03J5/02 , H03J2200/10 , H03L5/02
摘要： An automatic tuning system for a magnetic field generating tuned circuit includes a processor configured to maintain the resonant frequency of a tuned circuit equal to a reference frequency. The tuned circuit is driven by a power amplifier whose output provides an amplified signal at the reference frequency. The tuned circuit includes a magnetic field generating inductor and a bank of individually switchable capacitors controlled by the processor capable of adding and removing the respective capacitances to and from the tuned circuit. The inductor includes a Faraday shield to shield the tuned circuit from the influence of electric fields. In an embodiment of the invention, the variable capacitor is in the form of a diode variable capacitor (varicap) in parallel circuit relationship with the tuned circuit capacitor and the inductor. In an alternate embodiment the inductor and a fixed capacitor are in series circuit relationship with the varicap in parallel circuit relationship with the fixed capacitor and the tuning sequence relies on a phase locked loop using the phase of a reference frequency signal and the phase of the inductor voltage as control parameters.
摘要翻译： 用于磁场产生调谐电路的自动调谐系统包括被配置为将调谐电路的谐振频率保持为等于参考频率的处理器。 调谐电路由功率放大器驱动，功率放大器的输出以参考频率提供放大信号。 调谐电路包括磁场产生电感器和由处理器控制的可分开开关电容器组，能够将调谐电路的相应电容加到和去除。 电感器包括法拉第屏蔽，用于屏蔽调谐电路免受电场的影响。 在本发明的一个实施例中，可变电容器是与调谐电路电容器和电感器并联电路的二极管可变电容器（变容二极管）的形式。 在替代实施例中，电感器和固定电容器与变容二极管的串联电路与固定电容器并联电路的关系，并且调谐序列依赖于使用参考频率信号的相位和电感的相位的锁相环 电压作为控制参数。
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公开(公告)号：US20080211597A1
公开(公告)日：2008-09-04
申请号：US12034619
申请日：2008-02-20
IPC分类号： H03G11/04
CPC分类号： H04B1/30
摘要： A filter circuit including first and second real filters of a zero-IF scheme. The first and second real filters receive an I component and a Q component separated from a reception signal, respectively; and a switch section for producing a complex filter by switchably connecting the first and second real filters through interconnection elements. The switch section further receiving a switching signal for connecting the first and second real filters, thereby switching from the zero-IF scheme to a low-IF scheme.
摘要翻译： 一种滤波电路，包括零中频方案的第一和第二实数滤波器。 第一和第二实际滤波器分别接收与接收信号分离的I分量和Q分量; 以及用于通过互连元件可转换地连接第一和第二实际滤波器来产生复数滤波器的开关部分。 开关部分还接收用于连接第一和第二实际滤波器的切换信号，从而从零中频方案切换到低中频方案。
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公开(公告)号：US07015769B2
公开(公告)日：2006-03-21
申请号：US10429427
申请日：2003-05-05
CPC分类号： A61N1/025 , A61N1/37229 , A61N1/3787 , H03J5/02 , H03J2200/10 , H03L5/02
摘要： An automatic tuning system for a magnetic field generating tuned circuit includes a processor configured to maintain the resonant frequency of a tuned circuit equal to a reference frequency. The tuned circuit is driven by a power amplifier whose output provides an amplified signal at the reference frequency. The tuned circuit includes a magnetic field generating inductor and a bank of individually switchable capacitors controlled by the processor capable of adding and removing the respective capacitances to and from the tuned circuit. The inductor includes a Faraday shield to shield the tuned circuit from the influence of electric fields. A power sense circuit monitors the power delivered by the power amplifier to the tuned circuit and the processor sequentially switches the capacitors in a binary progression format to achieve maximum power delivery indicative of conforming the resonant frequency of the tuned circuit to the reference frequency. In an alternate embodiment of the invention, the inductor includes a plurality of taps that provide individually selectable inductance values available for use in the process of conforming the resonant frequency of the tuned circuit to the reference frequency. In further alternate embodiments, the variable capacitor is in the form of a motor driven variable capacitor and the tuning sequence relies on a phase locked loop using the phase of a reference frequency signal and the phase of the inductor current as control parameters.
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