公开(公告)号：US08705771B1

公开(公告)日：2014-04-22

申请号：US11694931

申请日：2007-03-30

申请人： Marcellus R. Chen ,  Ansuya P. Bhatt

发明人： Marcellus R. Chen ,  Ansuya P. Bhatt

IPC分类号： H03F21/00

CPC分类号： H03F3/181 ,  H03F1/0205

摘要： Separate control of the operation of an audio amplifier and a charge pump that synthesizes a negative voltage supply (VSS) for improving the dynamic range of the audio amplifier. The audio amplifier is typically powered by a single positive power supply (VDD) and the charge pump is arranged to synthesize a negative voltage supply rail (VSS) that enables a greater dynamic range for the amplifier's “on” and “shut down” modes of operation. Also, when the audio amplifier enters its shut down mode of operation to create at least some isolation from Line_In audio signals provided at the amplifier's output by other electronic devices, the amplifier's charge pump stays “on” and continues to provide the negative voltage supply rail (VSS). In this way, the greater dynamic range offered by the presence of both the positive and negative voltage rails is provided even if the amplifier is in a shut down mode.

摘要翻译： 独立控制音频放大器和电荷泵的操作，合成负电压源（VSS），以改善音频放大器的动态范围。 音频放大器通常由单个正电源（VDD）供电，并且电荷泵被布置成合成负电压电源轨（VSS），其能够为放大器的“开”和“关”模式提供更大的动态范围 操作。 此外，当音频放大器进入其关闭模式的操作，以便与其他电子设备在放大器的输出处提供的Line_In音频信号进行至少一些隔离时，放大器的电荷泵保持“接通”，并继续提供负电压供电轨 （VSS）。 以这种方式，即使放大器处于关闭模式，也提供由正和负电压轨两者提供的更大的动态范围。

公开(公告)号：US08284962B2

公开(公告)日：2012-10-09

申请号：US11327757

申请日：2006-01-09

申请人： Clifford William Latshaw

发明人： Clifford William Latshaw

IPC分类号： H03F21/00

CPC分类号： H04R3/00

摘要： An Electronic bass register musical instrument tube preamplifier includes an in line signal pre-amplification device in a Class A audio amplifier configuration. The pre-amplification device includes one or more modern thin film capacitors coupled to the output of the preamplifier circuit from the anode of half of a dual triode 12AX7 electron tube and one or more “paper in oil” capacitors. The one or more “paper in oil” capacitors are coupled to bypass and decouple to ground at the anode of half of the dual triode 12AX7 electron tube.

摘要翻译： 电子贝司寄存器乐器管前置放大器包括A类音频放大器配置中的在线信号预放大器件。 预放大装置包括一个或多个现代薄膜电容器，其耦合到来自双三极管12AX7电子管的一半的阳极和一个或多个油在电容器中的前置放大器电路的输出。 在油电容器中的一个或多个纸被耦合以在双重二极管12AX7电子管的一半的阳极处旁路和去耦合到地。

公开(公告)号：US07893764B2

公开(公告)日：2011-02-22

申请号：US12535634

申请日：2009-08-04

申请人： Takashi Handa ,  Toshiro Mayuzumi

发明人： Takashi Handa ,  Toshiro Mayuzumi

IPC分类号： H03F21/00

CPC分类号： H03F3/2173

摘要： Common mode choke coil device includes four coils wound on a core in a same direction. Hot-side outputs of first and second class-D amplifiers are connected to respective ones of first ends of two of the four coils, and first and second hot-side output terminals are connected to respective ones of second ends of the two coils. Ground-side outputs of the first and second class-D amplifiers are connected to respective ones of the first ends of remaining two of the four coils, and first and second ground-side output terminals are connected to respective ones of the second ends of the remaining two coils. Single-end connection is realized by connecting a separate load to each of the class-D amplifiers via the corresponding first (or second) hot-side and ground-side output terminals. BTL connection is realized by connecting a single load to the class-D amplifiers via the first and second hot-side output terminals.

摘要翻译： 共模扼流线圈装置包括沿相同方向缠绕在芯上的四个线圈。 第一和第二D类放大器的热侧输出连接到四个线圈中的两个的第一端的相应的一端，第一和第二热侧输出端连接到两个线圈的相应的第二端。 第一和第二D类放大器的接地端输出连接到四个线圈中的剩余两个的第一端中的相应的一端，第一和第二接地侧输出端连接到 剩下两个线圈。 通过相应的第一（或第二）热侧和接地侧输出端子将单独的负载连接到每个D类放大器来实现单端连接。 通过第一和第二热侧输出端子将单个负载连接到D类放大器来实现BTL连接。

公开(公告)号：US07889001B2

公开(公告)日：2011-02-15

申请号：US12503820

申请日：2009-07-15

申请人： Richard Knight Hester

发明人： Richard Knight Hester

IPC分类号： H03F21/00

CPC分类号： H03F3/217

摘要： Systems and methods for reduced distortion in a class D amplifier are provided. An “ideal” digital output signal is produced. The “ideal” digital output signal is then compared to the actual output signal in an error amplifier. The integrator input is the difference between the output stage waveform and the ideal output stage waveform. The net input to the integrator now comprises the imperfections of the power stage, and the feedback loop drives their average to zero. This error is then amplified and integrated. The integrated signal is than applied to a summer where it is added to the analog input. Then as in the typical Class D amplifier, the integrated signal is compared in an error amplifier to a ramp signal generated from the ramp generator.

摘要翻译： 提供了D类放大器减少失真的系统和方法。 产生“理想”数字输出信号。 然后将“理想”数字输出信号与误差放大器中的实际输出信号进行比较。 积分器输入是输出级波形与理想输出级波形之间的差异。 现在，积分器的净输入包括功率级的缺陷，反馈回路驱动其平均值为零。 然后将该误差放大并集成。 集成信号比应用于加到模拟输入的夏天。 然后如在典型的D类放大器中，积分信号在误差放大器中与从斜坡发生器产生的斜坡信号进行比较。

公开(公告)号：US07626456B2

公开(公告)日：2009-12-01

申请号：US12121143

申请日：2008-05-15

申请人： Pietro Antonio Paolo Calö ,  Philippe Sirito-Olivier ,  Mario Chiricosta

发明人： Pietro Antonio Paolo Calö ,  Philippe Sirito-Olivier ,  Mario Chiricosta

IPC分类号： H03F21/00

CPC分类号： H03F1/3211

摘要： An overdrive control system includes a voltage controlled current source to deliver a compensation current, and being between a first voltage reference and an internal node, which is connected to an output terminal. The voltage controlled current source has a control terminal connected to an output terminal of an adding block, which has a positive input connected to an input terminal. At least one clamping block is between the output terminal and a second voltage reference, and is connected to a negative input of the adding block. The voltage controlled current source delivers its compensation current to the output terminal when a voltage signal on the input terminal has an higher value than a voltage signal on the output terminal, and forces an output voltage signal to follow an input voltage signal to an extent that depends on a clamping voltage provided by the clamping block.

摘要翻译： 超速控制系统包括用于传送补偿电流的电压控制电流源，以及连接到输出端子的第一电压基准和内部节点之间。 压控电流源具有连接到加法块的输出端子的控制端子，其具有连接到输入端子的正输入端。 至少一个钳位块位于输出端和第二参考电压之间，并连接到加法块的负输入端。 当输入端子上的电压信号值高于输出端子上的电压信号时，电压控制电流源将其补偿电流输出到输出端子，并迫使输出电压信号跟随输入电压信号， 取决于夹紧块提供的钳位电压。

公开(公告)号：US20090232332A1

公开(公告)日：2009-09-17

申请号：US12046338

申请日：2008-03-11

申请人： Ulrich Horbach ,  Jaye Waas

发明人： Ulrich Horbach ,  Jaye Waas

IPC分类号： H03F21/00

CPC分类号： H03F3/217

摘要： The invention relates to a class-D audio amplifier. The class-D audio amplifier is configured in a current feedback mode as a voltage-controlled current source and a passive inductor/capacitor (LC) reconstruction filter. A portion of the passive LC reconstruction filter is situated in a feedback loop to an error amplifier.

摘要翻译： 本发明涉及一种D类音频放大器。 D类音频放大器配置为电流反馈模式，作为压控电流源和无源电感/电容（LC）重构滤波器。 无源LC重构滤波器的一部分位于误差放大器的反馈回路中。

公开(公告)号：US20090220110A1

公开(公告)日：2009-09-03

申请号：US12041414

申请日：2008-03-03

申请人： Seyfollah Bazarjani ,  Guoqing Miao ,  Joseph R. Fitzgerald ,  Prajakt V. Kulkarni ,  Justin Joseph Rosen Gagne ,  Gene H. McAllister ,  Jeffrey Hinrichs ,  Jan Paul van der Wagt

发明人： Seyfollah Bazarjani ,  Guoqing Miao ,  Joseph R. Fitzgerald ,  Prajakt V. Kulkarni ,  Justin Joseph Rosen Gagne ,  Gene H. McAllister ,  Jeffrey Hinrichs ,  Jan Paul van der Wagt

IPC分类号： H03F21/00

CPC分类号： H03F1/0222 ,  H03F1/0211 ,  H03F2200/03 ,  H03G3/30 ,  H03G3/3005 ,  H03G3/32

摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.

摘要翻译： 一种提高音频系统功耗效率的系统和方法。 实质上，该技术是根据由音量控制模块指示的音量水平和/或响应于检测到的输入特性来调节从电源传递到模拟部分（例如功率放大器）的功率 音频信号。 因此，以这种方式，模拟部分以与其正在处理的信号的电平相关的方式操作。 此外，该系统和方法还涉及一种调整数字信号和模拟信号的动态范围的技术，以改善系统的整体动态范围，而不需要消耗附加功率。

公开(公告)号：US20090060228A1

公开(公告)日：2009-03-05

申请号：US12202360

申请日：2008-09-01

申请人： Daniel L. Chieng ,  Douglas D. Gephardt ,  Jeffrey M. Klaas ,  Adam Zaharias

发明人： Daniel L. Chieng ,  Douglas D. Gephardt ,  Jeffrey M. Klaas ,  Adam Zaharias

IPC分类号： H03F21/00 ,  G06F3/00

CPC分类号： G06F3/162

摘要： Systems and methods for “shadowing” a target codec to provide additional features that are not available in the target codec. In one embodiment, an audio amplification system includes a High Definition Audio (HDA) bus, and an HDA controller, a conventional HDA codec and a shadow HDA codec coupled to the HDA bus. The conventional codec receives audio data and commands from the HDA controller via the bus and processes them to generate an output audio signal. The shadow codec snoops the audio data and commands on the HDA bus that are targeted to the conventional codec. The shadow codec processes the snooped audio data and commands to generate a second audio output. The shadow codec does not communicate with the HDA controller and is transparent to the controller. The shadow codec does not request enumeration from the HDA controller and does not receive an address from the HDA controller.

摘要翻译： 用于“遮蔽”目标编解码器以提供目标编解码器中不可用的附加功能的系统和方法。 在一个实施例中，音频放大系统包括高清晰度音频（HDA）总线和HDA控制器，传统的HDA编解码器和耦合到HDA总线的影子HDA编解码器。 常规编解码器经由总线从HDA控制器接收音频数据和命令，并处理它们以产生输出音频信号。 影子编解码器侦听HDA总线上的传统编解码器的音频数据和命令。 影子编解码器处理窥探的音频数据和命令以产生第二个音频输出。 影子编解码器不与HDA控制器通信，对控制器是透明的。 影子编解码器不要求来自HDA控制器的枚举，也不会从HDA控制器接收地址。

公开(公告)号：US20090060208A1

公开(公告)日：2009-03-05

申请号：US11845484

申请日：2007-08-27

申请人： Davis Y. Pan ,  Shiufun Cheung ,  Darby Edward Hadley ,  Ryo Maiguma ,  Takao Nakayama ,  Bruce C. Po ,  Katsumi Tomida ,  Petr Vicherek ,  Tobe Z. Barksdale ,  Ronald A. Fowler

发明人： Davis Y. Pan ,  Shiufun Cheung ,  Darby Edward Hadley ,  Ryo Maiguma ,  Takao Nakayama ,  Bruce C. Po ,  Katsumi Tomida ,  Petr Vicherek ,  Tobe Z. Barksdale ,  Ronald A. Fowler

IPC分类号： H04R5/00 ,  H03F21/00 ,  H04B1/00

CPC分类号： H04S7/30 ,  H04R2499/13

摘要： A vehicle audio system that includes a source of audio signals, which may include both entertainment audio signals and announcement audio signals, speakers for radiating audio signals, and spatial enhancement circuitry comprising circuitry to avoid applying spatial enhancement processing to the announcement audio signals.

摘要翻译： 包括音频信号源的车载音频系统，其可以包括娱乐音频信号和通告音频信号，用于辐射音频信号的扬声器，以及包括用于避免对通告音频信号应用空间增强处理的电路的空间增强电路。

公开(公告)号：US20080310654A1

公开(公告)日：2008-12-18

申请号：US12122074

申请日：2008-05-16

申请人： DIRK T. JAMBOR ,  Helmut Butz

发明人： DIRK T. JAMBOR ,  Helmut Butz

IPC分类号： H03F21/00

CPC分类号： H03G5/04 ,  H03G5/025

摘要： A circuit for processing sound signals includes an input amplifier for amplifying an input signal, wherein the amplified input signal is supplied to an output amplifier unchanged via a primary path configured as a bypass line and processed via one or several secondary paths configured as a circuit for processing the amplified input signal for amplifying and outputting the processed signal, wherein respective signal portions of the amplified input signal, which are supplied to the output amplifier via the primary path and the secondary path(s), can each be adjusted with an adjusting device, and wherein the secondary path includes a corresponding equalizing filter for filtering a corresponding frequency range with a dynamic circuit for optionally dynamically changing frequency, amplitude and phase depending on the signal and concurrent with a static control.

摘要翻译： 一种用于处理声音信号的电路包括用于放大输入信号的输入放大器，其中放大的输入信号通过被配置为旁路线路的主路径不变地被提供给输出放大器，并经由被配置为电路 处理放大的输入信号以放大和输出处理的信号，其中经由主路径和次路径提供给输出放大器的经放大的输入信号的各个信号部分可以各自用调整装置 ，并且其中所述次路径包括相应的均衡滤波器，用于使用动态电路对相应的频率范围进行滤波，用于根据信号和静态控制并行地选择性地动态地改变频率，幅度和相位。