公开(公告)号：US12107560B2

公开(公告)日：2024-10-01

申请号：US17825544

申请日：2022-05-26

申请人： Blackstar Amplification Ltd.

发明人： Paul James Stevens

IPC分类号： H03G3/00 ,  G10H1/06 ,  H03F3/185 ,  H03F3/28 ,  H03F5/00

CPC分类号： H03G3/004 ,  G10H1/06 ,  H03F3/1855 ,  H03F3/28 ,  H03F5/00 ,  G10H2210/311

摘要： Multiple example valve amplifiers are provided. A first example valve amplifier is provided which comprises (i) a valve power amplifier switchable between a high-power mode and a low-power mode and (ii) a loudspeaker simulator circuit, the valve amplifier being configured such that the valve power amplifier drives the loudspeaker simulator circuit in the low-power mode. A second example valve amplifier is provided which comprises a switched-mode power supply, SMPS, system), the SMPS system comprising (i) an SMPS and (ii) circuitry configured to enable an output impedance of the SMPS to be switched between first and second output impedances, the first output impedance being lower than the second output impedance.

公开(公告)号：US09893691B2

公开(公告)日：2018-02-13

申请号：US15386174

申请日：2016-12-21

申请人： Hiroshi Akino

发明人： Hiroshi Akino

IPC分类号： H04R3/06 ,  H03F5/00 ,  H04R19/04 ,  H04R3/00

CPC分类号： H03F5/00 ,  H03F3/30 ,  H03F3/3069 ,  H03F2200/03 ,  H03F2203/30078 ,  H03F2203/30111 ,  H04R3/00 ,  H04R19/04

摘要： In an impedance converter using an electron tube as an active element, output impedance can be made sufficiently low, and the number of circuit elements therefor is decreased and a circuit configuration therefor is made simple. Provided is an impedance converter having an electron tube cathode-follower connected. The impedance converter includes a bias diode that provides a bias voltage to a cathode of the electron tube, high resistance elements that provide a voltage of the bias diode to a grid of the electron tube, a load circuit connected to the electron tube, and a complementary emitter output circuit including two transistors, respective bases of which are connected to one end and the other end of the bias diode.

公开(公告)号：US09685917B1

公开(公告)日：2017-06-20

申请号：US15272264

申请日：2016-09-21

申请人： Tack Ching Wun

发明人： Tack Ching Wun

IPC分类号： H04R27/04 ,  H03F3/181 ,  H03F3/45 ,  H03F3/22 ,  H04R1/10

CPC分类号： H03F3/181 ,  H03F3/22 ,  H03F3/45475 ,  H03F3/68 ,  H03F5/00 ,  H03F2200/03 ,  H03F2203/45112 ,  H04R1/1008 ,  H04R1/1025 ,  H04R1/1041 ,  H04R1/1058 ,  H04R5/033 ,  H04R5/04 ,  H04R2420/07

摘要： A hi-fi headphone device with two speakers, an integrated pentode vacuum tube, and a battery. The battery is electrically connected to direct and bias circuits, to provide proper voltage to the vacuum tube amplifiers, wherein input signal is amplified and output to buffer circuits and impedance is matched between the tube and output speaker terminals.

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

IPC分类号： H03F3/217 ,  H03F5/00 ,  H03F1/32 ,  H04R3/00

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.

公开(公告)号：US09648420B2

公开(公告)日：2017-05-09

申请号：US15164404

申请日：2016-05-25

申请人： Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America

发明人： Dallas Dwight Hickerson ,  Kenneth Dale Finlon

IPC分类号： H03G11/00 ,  H04R3/00 ,  H03F5/00 ,  H03F1/52 ,  H03F3/185 ,  H03F3/45 ,  H03F3/181 ,  H03F3/20 ,  H04R3/12

CPC分类号： H04R3/007 ,  H03F1/52 ,  H03F3/181 ,  H03F3/185 ,  H03F3/20 ,  H03F3/45475 ,  H03F5/00 ,  H03F2200/99 ,  H04R3/00 ,  H04R3/12 ,  H04R2499/13

摘要： An audio power amplifier arrangement includes an audio power amplification integrated circuit having two loudspeaker outputs. A rectifier circuit includes a first diode having a cathode connected to one of the two loudspeaker outputs and an anode connected to a rectifier output node. A second diode has an anode connected to the one loudspeaker output. A first resistor has a first end connected to a cathode of the second diode and a second end connected to the rectifier output node. A capacitor has a first end connected to the rectifier output node and a second end connected to electrical ground. A second resistor has a first end connected to the rectifier output node and a second end connected to electrical ground.

公开(公告)号：US20140176237A1

公开(公告)日：2014-06-26

申请号：US14139907

申请日：2013-12-24

申请人： Samsung Electronics Co., Ltd.

发明人： Jae-cheol LEE ,  Byung-soo KIM ,  Joo-moon YOUN ,  Kee-yeong CHO

IPC分类号： H03F3/02

CPC分类号： H03F3/02 ,  H03F3/181 ,  H03F3/20 ,  H03F5/00

摘要： An electronic device includes an amplifier which is configured to amplify a sound signal and includes a vacuum tube including a heater configured to heat the vacuum tube; a voltage supply which is configured to supply a first voltage and a second voltage which is higher than the first voltage; and a controller which is configured to control the voltage supply to supply the second voltage to the heater in response to supply of a drive voltage to the amplifier being started and to supply the first voltage to the heater if the vacuum tube reaches a predetermined temperature.

摘要翻译： 电子设备包括放大器，其被配置为放大声音信号，并且包括：真空管，其包括被配置为加热所述真空管的加热器; 被配置为提供高于第一电压的第一电压和第二电压的电压源; 以及控制器，被配置为控制电压供应以响应于向正在启动的放大器提供驱动电压而向加热器提供第二电压，并且如果真空管达到预定温度则将第一电压提供给加热器。

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。

公开(公告)号：US5705950A

公开(公告)日：1998-01-06

申请号：US601758

申请日：1996-02-15

申请人： Brent K. Butler

发明人： Brent K. Butler

IPC分类号： H03F1/32 ,  H03F3/181 ,  H03F5/00 ,  H03F1/34

CPC分类号： H03F1/327 ,  H03F3/181 ,  H03F5/00

摘要： In this hybrid amplifier circuit the vacuum tube is direct coupled or DC coupled to the output of a solid state amplifier in a cathode follower configuration. An automatically operative bypass component, such as a Zener diode, LED, transistor junction or relay, diverts the signal output of the solid state amplifier around the vacuum tube stage when bias conditions or other vacuum tube operating conditions signify that the vacuum tube is still warming up or for some reason inoperative. Thus the hybrid circuit produces amplification at full volume and at low distortion even while the vacuum tube is warming up. The vacuum tube provides a desirable warming coloration to the sound that may be user adjusted by controlling the level of closed loop feedback within the circuit. Lower total harmonic distortion is achieved in a pentode vacuum tube device by direct coupling the screen and control grids. Lower voltage use of power pentodes wired in nonconventional "triode mode" is achieved.

摘要翻译： 在该混合放大器电路中，真空管直接耦合或直流耦合到阴极跟随器配置中的固态放大器的输出端。 当偏置条件或其他真空管工作条件表示真空管仍然变暖时，诸如齐纳二极管，LED，晶体管结或继电器之类的自动操作旁路部件会将固态放大器的信号输出转向真空管级 或由于某种原因不起作用。 因此，混合电路即使在真空管正在升温时也以全体积和低失真产生放大。 真空管提供对声音的期望的加热着色，其可以通过控制电路内的闭环反馈的水平而被用户调整。 通过直接耦合屏幕和控制网格，在五极管真空管装置中实现较低的总谐波失真。 实现了以非常规“三极管模式”连接的功率五极管的较低电压使用。

公开(公告)号：US3922616A

公开(公告)日：1975-11-25

申请号：US47231974

申请日：1974-05-22

申请人： US ARMY

发明人： WEINER MAURICE

IPC分类号： H03F5/00 ,  H03F3/54

CPC分类号： H03F5/00

摘要： A p -i-n semiconductor diode is used as the target for an electron-bombarded semiconductor amplifier. In such amplifiers, a form of evacuated electron tube has a conventional cathode, heater, and grid. However, the tube has the semiconductor diode target in place of the more conventional anode. A high beamaccelerating potential between the cathode and the target causes a high-velocity electron beam to bombard the target, which has its outer layer thin enough to permit the electrons to pass through to the intrinsic region of the diode, where the electrons generate electron-hole pairs. The semiconductor diode target is connected in series with an output load and a source of target bias potential that draws a current of the newly-created electron-hole pairs across the output load. The grid modulates the electron beam, which, in turn controls the current across the output load.

摘要翻译： 使用p + + i-n +半导体二极管作为电子轰击半导体放大器的目标。 在这种放大器中，抽真空的电子管的形式具有常规的阴极，加热器和电网。 然而，管具有半导体二极管靶，代替较传统的阳极。 阴极和靶之间的远光加速电位使得高速电子束轰击靶，其外层薄到足以允许电子通过二极管的本征区域，其中电子产生 电子 - 空穴对。 半导体二极管靶与输出负载和目标偏置电位的源串联连接，该源的目标偏置电位在输出负载上吸引新产生的电子 - 空穴对的电流。 电网调制电子束，电子束又控制输出负载上的电流。

公开(公告)号：US3908170A

公开(公告)日：1975-09-23

申请号：US53075474

申请日：1974-12-09

申请人： PHILCO FORD CORP

发明人： BUHLER FREDERICK T

IPC分类号： H03F5/00 ,  H04N5/14

CPC分类号： H03F5/00 ,  H04N5/148

摘要： A high performance video amplifier employs a vacuum tube output stage and a transistor driver. A complementary pair of transistors is series connected into the tube cathode circuit and the pair is driven by a differential driver amplifier. The video input is applied to one input of the differential amplifier and the other input is connected to a cathode current sensing resistor to stabilize the amplifier.

摘要翻译： 高性能视频放大器采用真空管输出级和晶体管驱动器。 互补的晶体管对被串联连接到管阴极电路中，并且该对由差分驱动放大器驱动。 视频输入被应用于差分放大器的一个输入端，另一个输入端连接到阴极电流检测电阻器来稳定放大器。