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公开(公告)号：US09680432B2
公开(公告)日：2017-06-13
申请号：US15067550
申请日：2016-03-11
申请人： YAMAHA CORPORATION
发明人： Yohei Otani , Masao Noro
CPC分类号： H03F5/00 , H03F1/3264 , H03F1/327 , H03F3/217 , H03F2200/549 , H04R3/00
摘要： A power amplifier includes a class-D amplifier and an input signal supplier. The class-D amplifier includes an input portion and a switching device. The switching device is switched according to an input signal that is input to the input portion so that a current is supplied to a load from a power source via the switching device. The input signal supplier supplies the input signal to the input portion of the class-D amplifier, calculates a virtual output voltage to be output from a virtual power source having a prescribed internal impedance characteristic when a current to flow through the load is output from the virtual power source, and adjust an amplitude of the input signal according to the virtual output voltage.
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公开(公告)号：US20070285156A1
公开(公告)日：2007-12-13
申请号：US11836674
申请日：2007-08-09
申请人： Douglas Roberts , Brett Hertzberg
发明人： Douglas Roberts , Brett Hertzberg
IPC分类号： H03F3/14
CPC分类号： G10H1/0008 , G10H3/187 , G10H2220/061 , H03F1/327 , H03F3/181 , H03F3/183 , H03F5/00 , H03F2200/03 , H03F2200/321 , H03F2200/462 , H03F2200/471 , H03F2200/549 , H03F2200/78
摘要： Methods are provided for solid-state implementation of a vacuum tube replacement device that supplements the functional performance of the target replacement device, i.e., a traditional glass vacuum tube. Example functions may include OEM or user adjustable parameters such as gain and/or frequency response (e.g. transfer function), current and/or voltage saturation thresholds, bias condition, input and/or output impedance, linear-to-non-linear transfer function(s) (e.g. soft clipping parameters), power dissipation, communication protocols, and audio/visual indication parameters such as signal limiting detection, safety, stress, or wear-out conditions, and tube emulation model type to name a few. The methods presented for the vacuum tube replacement device system(s) are equally useful for non-vacuum tube systems such as audio amplifier circuits.
摘要翻译： 提供了用于固态实施真空管更换装置的方法，其补充了目标更换装置即传统的玻璃真空管的功能性能。 示例功能可以包括OEM或用户可调参数，例如增益和/或频率响应（例如传递函数），电流和/或电压饱和阈值，偏置条件，输入和/或输出阻抗，线性到非线性传递函数 （例如软削波参数），功耗，通信协议以及诸如信号限制检测，安全性，应力或磨损条件的音频/视觉指示参数以及管仿真模型类型等等。 提供给真空管更换装置系统的方法对于诸如音频放大器电路的非真空管系统同样有用。
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公开(公告)号：US5805713A
公开(公告)日：1998-09-08
申请号：US761964
申请日：1996-12-10
申请人： Eric K. Pritchard
发明人： Eric K. Pritchard
CPC分类号： H03G7/002 , G10H1/16 , G10H3/187 , H03F1/327 , H03F1/3276 , H03F2200/549
摘要： A solid state emulation of vacuum tube amplifiers and more particularly to the emulation of push-pull output stages. This application focuses on the emulation of grid conduction by the output tubes and their non-linear transconductance.
摘要翻译： 真空管放大器的固态仿真，更具体地涉及推挽输出级的仿真。 该应用集中在输出管及其非线性跨导的电网导通仿真。
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公开(公告)号：US5636284A
公开(公告)日：1997-06-03
申请号：US202369
申请日：1994-02-25
申请人： Eric K. Pritchard
发明人： Eric K. Pritchard
CPC分类号： H03G7/004 , G10H1/16 , G10H3/187 , H03F1/327 , H03F1/3276 , H03G7/00 , H03F2200/549
摘要： Solid state emulations of vacuum tube power amplifier are shown for both high-power and low-power applications. The emulations include the screen grid and power supply effect of compression, the variable output impedance for reacting with a speaker load, power tube distortions, the limiting and bias shifting created by the power tube grids, and the bias shifting of the phase splitter. The high-power disclosure includes a current amplifier which may be linear or switching. The low-power disclosure simulates a vacuum tube amplifier with a speaker load in order to drive a master volume without diminishing the classic distorted tone. It has means to simulate the speaker impedance. The solid state emulation includes a gain control means which produce an unclipped region which may be divided into more or less distortion than one percent and two clipped regions having different output impedances or different frequency characteristics.
摘要翻译： 显示了真空管功率放大器的固态仿真，适用于大功率和低功耗应用。 模拟包括屏幕网格和压缩的电源效应，用于与扬声器负载反应的可变输出阻抗，功率管失真，由功率管栅极产生的限制和偏移移位以及相分离器的偏置偏移。 高功率公开包括可以是线性或开关的电流放大器。 低功率公开模拟具有扬声器负载的真空管放大器，以便驱动主音量而不减少经典失真音。 它具有模拟扬声器阻抗的手段。 固态仿真包括增益控制装置，该增益控制装置产生可被分成多于或大于1％的失真的未剪切区域，以及具有不同输出阻抗或不同频率特性的两个限幅区域。
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5.发明授权
公开(公告)号：US4439742A
公开(公告)日：1984-03-27
申请号：US299565
申请日：1981-09-04
申请人： Jack C. Sondermeyer
发明人： Jack C. Sondermeyer
CPC分类号： H03G11/002 , H03F1/327 , H03F1/3276 , H03G7/001 , H03F2200/549
摘要： Circuitry is provided for simulating a combination of vacuum tube clipping and soft cross-over characteristics in a transistor power amplifier circuit. A first circuit includes a biasing network for assuring that the transistor amplifier saturates in response to high level input signals. A second circuit includes a biasing network for providing sufficient bias current to maintain the transistor in an active, rather than cutoff, operating region when the first circuit fails to provide the needed bias at times when the instantaneous input signal level is low but average or peak input levels are high. A combining circuit provides the higher of the bias values to the amplifier, to assure that the amplifier saturates for particular high level inputs yet operates at a modified, linear mode for low level inputs, thus simulating a compression characteristic of vacuum tube amplifiers.
摘要翻译： 提供电路用于模拟晶体管功率放大器电路中真空管限幅和软交叉特性的组合。 第一电路包括用于确保晶体管放大器响应于高电平输入信号饱和的偏置网络。 第二电路包括偏置网络，用于提供足够的偏置电流，以在第一电路在瞬时输入信号电平低但平均或峰值时不能提供所需的偏置时将晶体管保持在有效而不是截止操作区域 输入电平很高。 组合电路为放大器提供较高的偏置值，以确保放大器对于特定的高电平输入饱和，然后在修改的线性模式下对低电平输入进行操作，从而模拟真空管放大器的压缩特性。
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公开(公告)号：US20160268986A1
公开(公告)日：2016-09-15
申请号：US15067550
申请日：2016-03-11
申请人： YAMAHA CORPORATION
发明人： Yohei OTANI , Masao NORO
IPC分类号： H03F5/00
CPC分类号： H03F5/00 , H03F1/3264 , H03F1/327 , H03F3/217 , H03F2200/549 , H04R3/00
摘要： A power amplifier includes a class-D amplifier and an input signal supplier. The class-D amplifier includes an input portion and a switching device. The switching device is switched according to an input signal that is input to the input portion so that a current is supplied to a load from a power source via the switching device. The input signal supplier supplies the input signal to the input portion of the class-D amplifier, calculates a virtual output voltage to be output from a virtual power source having a prescribed internal impedance characteristic when a current to flow through the load is output from the virtual power source, and adjust an amplitude of the input signal according to the virtual output voltage.
摘要翻译： 功率放大器包括D类放大器和输入信号供应器。 D类放大器包括输入部分和开关装置。 开关装置根据输入到输入部分的输入信号进行切换，使得电流经由开关装置从电源提供给负载。 输入信号供给器将输入信号提供给D类放大器的输入部分，当从该D型放大器输出的电流流过负载时，计算出从具有规定的内部阻抗特性的虚拟电源输出的虚拟输出电压 虚拟电源，并根据虚拟输出电压调整输入信号的幅度。
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公开(公告)号：US20130034249A1
公开(公告)日：2013-02-07
申请号：US13564310
申请日：2012-08-01
申请人： Bruce Keir
发明人： Bruce Keir
IPC分类号： H03F99/00
CPC分类号： H03F1/327 , G10H3/187 , H03F2200/549 , H03G5/025 , H03G5/165
摘要： A solid-state audio power amplifier providing an instantaneous maximum output voltage capability in excess of its long term power output capability, in which the input signal is supplied from analogue or digital signal processor. The signal processor is arranged to limit the long term power output of the solid-state amplifier in a non-linear amplitude and frequency dependant manner
摘要翻译： 一种固态音频功率放大器，其提供超过其长期功率输出能力的瞬时最大输出电压能力，其中输入信号由模拟或数字信号处理器提供。 信号处理器被布置成以非线性的幅度和频率依赖的方式来限制固态放大器的长期功率输出
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公开(公告)号：US20090058530A1
公开(公告)日：2009-03-05
申请号：US11846923
申请日：2007-08-29
申请人： Mitchell E. Margolis
发明人： Mitchell E. Margolis
CPC分类号： H03F1/327 , H03F3/183 , H03F2200/03 , H03F2200/541 , H03F2200/549
摘要： The invention is a high-power transconductance circuit (HVTC) comprising three direct-coupled stages which can be substituted for a final-stage power-amplifying vacuum tube in an audio amplifier. The HVTC consists of an input stage, a driver stage, an output stage, and a power conditioner. The input to the HVTC is a composite signal consisting of an AC component and a DC component. The input stage conditions the input composite signal for input to the driver stage. The driver stage transforms the input composite signal into the driving signal for the output stage. The output stage utilizes one or more power transistors to drive a load. The power conditioner supplies regulated power to the HVTC. The input composite signal is direct-coupled through the input stage and the driver stage to the output stage.
摘要翻译： 本发明是一种高功率跨导电路（HVTC），其包括三个直接耦合级，其可替代音频放大器中的最后级功率放大真空管。 HVTC由输入级，驱动级，输出级和功率调节器组成。 HVTC的输入是由AC分量和DC分量组成的复合信号。 输入级将输入的复合信号输入到驱动级。 驱动级将输入复合信号转换为输出级的驱动信号。 输出级利用一个或多个功率晶体管驱动负载。 电源调节器为HVTC提供稳压电源。 输入复合信号通过输入级和驱动级直接耦合到输出级。
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公开(公告)号：US07286060B2
公开(公告)日：2007-10-23
申请号：US11203077
申请日：2005-08-12
IPC分类号： G08B5/00
CPC分类号： G10H3/187 , G10H1/0008 , G10H2220/061 , H03F1/327 , H03F3/183 , H03F2200/03 , H03F2200/321 , H03F2200/462 , H03F2200/471 , H03F2200/549 , H03F2200/78
摘要： A vacuum tube replacement device includes an indicator. The indicator can be arranged to provide audible and/or visual indication of system performance, function, status, or any other desired indication. The vacuum tube replacement device is pin-for-pin compatible with standard vacuum tube circuit pin configurations. The replacement device may be a solid-state tube emulator device, a traditional glass envelope vacuum tube device, or some other hybrid device. The visual indicator is equally useful for non-vacuum tube replacement devices such as audio amplifier circuits.
摘要翻译： 真空管更换装置包括指示器。 指示器可以被布置成提供系统性能，功能，状态或任何其他期望指示的可听和/或可视指示。 真空管更换装置是针对引脚与标准真空管电路引脚配置兼容的。 更换装置可以是固态管仿真器装置，传统的玻璃管真空管装置或其他混合装置。 视觉指示器对于诸如音频放大器电路的非真空管替换装置同样有用。
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公开(公告)号：US06895096B1
公开(公告)日：2005-05-17
申请号：US09557090
申请日：2000-04-21
申请人： John P. DeLuca
发明人： John P. DeLuca
CPC分类号： H03F3/181 , H03F3/22 , H03F17/00 , H03F2200/549
摘要： A audio amplifier employs microchannel plate for multiplying input electrons to produce output electrons at a rate corresponding to an audio input signal. The MCP may have a segment input source, segmented input and output electrodes or a segmented anode for allowing independent amplification of multiple input channels.
摘要翻译： 音频放大器采用微通道板来乘以输入电子，以对应于音频输入信号的速率产生输出电子。 MCP可以具有段输入源，分段输入和输出电极或分段阳极，用于允许多个输入通道的独立放大。
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