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1. 发明授权

US10469042B1 Audio amplifier circuit 有权
公开(公告)号：US10469042B1
公开(公告)日：2019-11-05
申请号：US15979166
申请日：2018-05-14
申请人： Ralph R. Karsten
发明人： Ralph R. Karsten
IPC分类号： H03F3/38 , H03F3/217 , H03F1/30 , H03F3/28
摘要： Apparatus and associated methods relating to the amplification of an audio signal. In particular, such application is performed by using an audio to pulse train converter configured to convert an analog audio signal to a complementary train of pulses having a duty cycle indicative of the level of the analog audio signal. The audio to pulse train converter can be a class-D amplifier, a sigma-delta amplifier, self-oscillating amplifier, or any other audio amplifier that is configured to provide complementary pulse trains each having a duty cycle that is representative of the input audio signal. The complementary pulse trains are directed to a circlotron that is configured to provide an amplified version of the audio signal at two output nodes. The amplifier circuit may further include one or more low pass filters and/or output reference resistors. Two similar circuits can be configured together to provide stereo audio amplification.

2. 发明申请

US20150280667A1 Programmable Vacuum Tube Bias Control 审中-公开
标题翻译：可编程真空管偏压控制
公开(公告)号：US20150280667A1
公开(公告)日：2015-10-01
申请号：US14229847
申请日：2014-03-29
申请人： Norman George Matthews
发明人： Norman George Matthews
IPC分类号： H03G3/00 , H03F3/28 , H03F3/181
CPC分类号： H03F3/181 , H03F1/307 , H03F3/28 , H03F2200/03 , H03F2200/321 , H03F2200/462 , H03F2200/471
摘要： This invention provides a way for the user of an amplifier to select the class of operation of the output power tubes. A microprocessor monitors the bias conditions and makes the necessary adjustments to set the amplifier in the user selected class of operation. In one embodiment of this invention the user selects the class of operation via a switch. The microprocessor calculates where the plate current should be per the selected class and adjusts the grid voltage until the proper plate current is achieved.
摘要翻译：本发明提供一种用于放大器的用户选择输出功率管的操作类别的方法。微处理器监控偏置条件，并进行必要的调整，以将放大器设置在用户选择的操作类别中。在本发明的一个实施例中，用户通过开关选择操作类别。微处理器根据所选类别计算板电流的位置，并调整电网电压，直到达到正确的电流电流。

3. 发明授权

US08541733B2 Laser light detection circuit 有权
标题翻译：激光检测电路
公开(公告)号：US08541733B2
公开(公告)日：2013-09-24
申请号：US13087101
申请日：2011-04-14
申请人： Rui Kurihara , Takahiro Kawashima
发明人： Rui Kurihara , Takahiro Kawashima
IPC分类号： H03F3/08 , H01J40/14 , H03F3/45 , H03F3/28
CPC分类号： G11B7/126 , G11B7/005 , H01S5/06832
摘要： The invention provides a laser light detection circuit that prevents a peak output occurring when the circuit switches between the operation stop mode and the operation mode so as to prevent the breakdown or malfunction of the next-connected circuit. A laser light detection circuit has a differential amplifier that amplifies and outputs a signal corresponding to the intensity of laser light, a drive transistor having a base to which the output of the differential amplifier is applied, a second constant-current source connected to the emitter of the drive transistor, an output transistor having a base connected to the emitter of the drive transistor, a bypass transistor connected between the emitter of the drive transistor and the ground, and a control circuit. The control circuit forms a bypass current route from the second constant-current source to the ground through the bypass transistor by turning on the bypass transistor when the circuit switches from the operation stop mode to the operation mode.
摘要翻译：本发明提供了一种激光检测电路，其防止当电路在操作停止模式和操作模式之间切换时出现峰值输出，以防止下一个连接电路的故障或故障。激光检测电路具有放大并输出与激光强度相对应的信号的差分放大器，具有施加了差分放大器的输出的基极的驱动晶体管，连接到发射极的第二恒流源驱动晶体管的输出晶体管，其基极连接到驱动晶体管的发射极，连接在驱动晶体管的发射极与地之间的旁路晶体管和控制电路。当电路从操作停止模式切换到操作模式时，通过接通旁路晶体管，控制电路通过旁路晶体管形成从第二恒定电流源到地的旁路电流路径。

4. 发明申请

US20120152089A1 Amplifier with selectable master control 有权
标题翻译：具有可选主控制功能的放大器
公开(公告)号：US20120152089A1
公开(公告)日：2012-06-21
申请号：US12928842
申请日：2010-12-21
申请人： Randall C. Smith
发明人： Randall C. Smith
IPC分类号： G10H3/10 , H03F3/28
CPC分类号： H03F3/28 , G10H3/187 , H03G1/0011 , H03G1/0088
摘要： An amplifier for electric guitar including a Cut control for attenuating high frequencies whose operation is expanded via a switch to alternately function as a Master Volume control.
摘要翻译：一种用于电吉他的放大器，包括用于衰减高频的切割控制，其操作通过开关扩展，以交替地用作主音量控制。

5. 发明申请

US20110043278A1 METHOD AND APPARATUS FOR BIASING AN AMPLIFIER 有权
标题翻译：用于放大放大器的方法和装置
公开(公告)号：US20110043278A1
公开(公告)日：2011-02-24
申请号：US12546456
申请日：2009-08-24
申请人： Charles C. Adams
发明人： Charles C. Adams
IPC分类号： H03F3/02 , H03F3/28
CPC分类号： H03F3/181 , H03F1/307 , H03F3/28 , H03F3/3001 , H03F3/45475 , H03F2200/321 , H03F2200/537 , H03F2200/541
摘要： An apparatus and method for biasing each amplifier of an amplification stage provides that the voltage across each current sensing element of each amplifier of the amplification stage is measured. For each pair of voltage measurements taken, a sum and difference is calculated, where the sum is processed to determine minima peaks and the difference is averaged. A portion of the sum term and the average of the difference term are summed to yield the individual bias current conducted by a first amplifier of the amplification stage. The difference between a portion of the sum term and the average of the difference term is calculated to yield the individual bias current conducted by the second amplifier of the amplification stage. The bias current conducted by the first and second amplifiers may then be individually modified manually, or conversely, may be modified automatically based upon the bias current measurements taken.
摘要翻译：用于偏置放大级的每个放大器的装置和方法提供了测量放大级的每个放大器的每个电流感测元件上的电压。对于每对电压测量，计算和和差，其中处理总和以确定最小峰值，并且将差值进行平均。求和项的一部分和差项的平均值相加以产生由放大级的第一放大器传导的各个偏置电流。计算和项的一部分和差项的平均值之间的差异，以产生由放大级的第二放大器传导的各个偏置电流。然后可以手动地单独地修改由第一和第二放大器传导的偏置电流，或者相反地，可以基于所采取的偏置电流测量自动地修改。

6. 发明申请

US20060273852A1 Amplifiers 审中-公开
标题翻译：放大器
公开(公告)号：US20060273852A1
公开(公告)日：2006-12-07
申请号：US11431938
申请日：2006-05-10
申请人： Chun-Jen ("Kevin") Chen , Kevin Morris
发明人： Chun-Jen ("Kevin") Chen , Kevin Morris
IPC分类号： H03F3/28
CPC分类号： H03F3/24 , H03F1/02 , H03F1/0205 , H03F1/0261 , H03F3/217 , H04L27/361
摘要： A class E amplifier circuit comprises a first class E amplifier connected to receive a first signal and operable to amplify the first signal and to output such an amplified first signal and a second class E amplifier connected to receive a second signal related to the first signal, and operable to amplify the second signal and to output such an amplified second signal. The circuit also comprises a combiner having first and second inputs connected to receive amplified signals from the first and second class E amplifiers respectively, and phase shift means operable to introduce a phase shift between signals for combination at the combiner.
摘要翻译： E类放大器电路包括连接以接收第一信号并且可操作以放大第一信号并输出这种放大的第一信号的第一类E放大器和连接以接收与第一信号相关的第二信号的第二类E放大器，并且可操作以放大第二信号并输出这种放大的第二信号。电路还包括具有第一和第二输入的组合器，其分别接收来自第一和第二类E放大器的放大信号;以及相移装置，用于在组合器之间引入用于组合的信号之间的相移。

7. 发明授权

US06937093B2 Cathode-coupled pentode valve amplifier with servo offset controlled push-pull output stage 失效
标题翻译：具有伺服偏移控制推挽输出级的阴极耦合五极管放大器
公开(公告)号：US06937093B2
公开(公告)日：2005-08-30
申请号：US10752966
申请日：2004-01-07
申请人： Terence D. Tekushan
发明人： Terence D. Tekushan
IPC分类号： H03F3/183 , H03F3/28 , H03F3/30
CPC分类号： H03F3/181 , H03F3/28 , H03F2200/541
摘要： An amplifier is described including a pair of cathode-coupled pentode vacuum tubes. A first pentode of the pair includes a control grid configured to receive an input signal. A second pentode of the pair includes a control grid configured to be coupled to an input reference signal. A cascaded voltage regulator includes a first stage configured to generate a plate reference voltage for providing voltage to a plate of each pentode. The regulator includes a second stage configured to generate a screen reference voltage based on the plate reference voltage for providing voltage to a screen grid of each pentode. The amplifier can also include a push-pull output stage having a servo circuit configured to adjust the control bias signal for one of a pair of vacuum tubes included in the stage until the plate currents in the pair of tubes are substantially equal.
摘要翻译：描述了包括一对阴极耦合的五极管真空管的放大器。该对的第一个五极管包括配置成接收输入信号的控制网格。该对的第二个五极管包括被配置为耦合到输入参考信号的控制网格。级联电压调节器包括第一级，其被配置为产生用于向每个五极管的板提供电压的板参考电压。调节器包括第二级，其被配置为基于板参考电压产生屏幕参考电压，用于向每个五极管的屏幕栅格提供电压。放大器还可以包括推挽输出级，其具有被配置为调整包括在级中的一对真空管中的一个中的控制偏置信号的伺服电路，直到该对管中的板电流基本相等。

8. 发明授权

US5604461A Transformerless output vacuum tube audio amplifier 失效
标题翻译：无变压器输出真空管音频放大器
公开(公告)号：US5604461A
公开(公告)日：1997-02-18
申请号：US589731
申请日：1996-01-22
申请人： Bruce M. Rozenblit
发明人： Bruce M. Rozenblit
IPC分类号： H03F1/02 , H03F3/181 , H03F3/28 , H03F3/30 , H03F1/36
CPC分类号： H03F3/30 , H03F1/02 , H03F3/181 , H03F3/28
摘要： An audio amplifier including a series connected vacuum tube output stage for driving an audio loudspeaker. The preferred amplifier uses the output signal as a floating reference for an intermediate stage to prevent output stage degeneration for producing balanced push-pull drive signals, thereby eliminating the need for an output transformer or AC coupling.
摘要翻译：一种音频放大器，包括用于驱动音频扬声器的串联的真空管输出级。优选的放大器将输出信号用作中间级的浮置参考，以防止输出级退化以产生平衡的推挽驱动信号，从而无需输出变压器或AC耦合。

9. 发明授权

US5302912A Push-pull audio amplifier with crossover distortion compensation 失效
标题翻译：推挽音频放大器，具有交叉失真补偿
公开(公告)号：US5302912A
公开(公告)日：1994-04-12
申请号：US060089
申请日：1993-05-10
申请人： Alan M. Grant
发明人： Alan M. Grant
IPC分类号： H03F1/32 , H03F3/28 , H03F3/26
CPC分类号： H03F1/3217 , H03F3/28
摘要： A high-performance, distortion-free, audio push-pull amplifier has a class A driver stage that drives a class B push-pull output stage that is coupled to a load through a transformer that has a center tap primary with screen taps. The driver tube cathodes are coupled to the output tube grids. The driver tube plates are tied to the screen taps on the output transformer primary. These taps are also coupled to the output tube screen grids. At low power levels the driver stage drives the load through the output transformer. As power level rises the power stage supplies more and more of the output power. This circuit avoids notch or crossover distortion at low power levels.
摘要翻译：高性能，无失真的音频推挽放大器具有A类驱动级，可驱动B类推挽输出级，通过具有屏幕抽头的中心抽头主变压器耦合到负载。驱动管阴极耦合到输出管网。驱动器管板连接到输出变压器初级的屏幕抽头上。这些抽头也耦合到输出管屏幕网格。在低功率级别，驱动级通过输出变压器驱动负载。随着功率电平的上升，功率级提供越来越多的输出功率。该电路可以在低功率电平下避免陷波或交叉失真。

10. 发明授权

US4644289A Variable power amplifier for audio frequency signals and method 失效
标题翻译：可变功率放大器用于音频信号和方法
公开(公告)号：US4644289A
公开(公告)日：1987-02-17
申请号：US677228
申请日：1984-12-03
申请人： Bruce L. Kennedy , Joseph K. Beller , Roger A. Modjeski
发明人： Bruce L. Kennedy , Joseph K. Beller , Roger A. Modjeski
IPC分类号： H03G3/22 , H03F3/28 , H03F3/68
CPC分类号： H03G3/22
摘要： A variable power amplifier having a constant current differential amplifier driving a cascaded driving amplifier, a variable power amplifier including a vacuum tube for selectively amplifying output signals wherein the drive of the variable power amplifier is determined by the plate shunt resistive loading of the vacuum tube, a push-pull amplifier including an output transformer operatively coupled to the variable power amplifier and to an amplifier output terminal to amplify and apply to the amplifier output terminal a selectively amplified output signal, and a variable damping circuit including a sensing element for sensing the loading on the output tranformer and a circuit for defining a feedback loop for producing a feedback signal having magnitude and polarity which are determined by the sensing element and wherein the variable damping circuit includes a circuit for applying the feedback signal as an input to the constant current differential amplifier to control the current level thereof as a function of the loading on the output transformer as sensed by the sensing element and wherein the plate current resistive loading of the vacuum tube in the variable power amplifier determines the drive thereof to limit the power of the selectively amplified output signals applied to the amplifier output terminal as shown. The combination of a preamplifier having pluggable modules for providing controlled output signals and a variable power amplifier is shown. A method for processing audio frequency electrical signals is also shown.
摘要翻译：一种具有驱动级联驱动放大器的恒流差动放大器的可变功率放大器，包括用于选择性地放大输出信号的真空管的可变功率放大器，其中可变功率放大器的驱动由真空管的板分流电阻负载确定，推挽放大器，其包括可操作地耦合到可变功率放大器的输出变压器和放大器输出端子，以放大并应用到放大器输出端子上的选择性放大的输出信号，以及可变阻尼电路，其包括用于感测负载的感测元件输出变压器和用于定义反馈回路的电路，用于产生由感测元件确定的具有大小和极性的反馈信号，并且其中可变阻尼电路包括用于将反馈信号作为输入施加到恒定电流差动器的电路放大器来控制当前的电平作为由感测元件感测的输出变压器上的负载的函数，并且其中可变功率放大器中的真空管的板电流电阻负载决定其驱动以限制施加到该功率放大器的选择性放大的输出信号的功率放大器输出端子如图所示。示出了具有用于提供受控输出信号的可插拔模块的前置放大器和可变功率放大器的组合。还示出了用于处理音频电信号的方法。

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