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公开(公告)号：CN108604887A
公开(公告)日：2018-09-28
申请号：CN201780008734.6
申请日：2017-01-27
Applicant: 杜比实验室特许公司
IPC: H03F3/217 , H04S7/00 , H04R5/00 , H04R29/00 , H03G3/30 , H03G3/00 , H03F3/68 , H04R5/04 , H02M1/32 , H02M1/42 , H05B37/02 , H02M1/00 , H03F3/181
CPC classification number: H04R5/04 , H02M1/32 , H02M1/4225 , H02M1/4241 , H02M2001/007 , H02M2001/325 , H03F1/301 , H03F3/183 , H03F3/2173 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2200/447 , H03F2200/468 , H03F2203/45512 , H03F2203/45522 , H03F2203/45528 , H03G3/007 , H03G3/3005 , H03G2201/208 , H03G2201/708 , H04R29/007 , H04R2420/05 , H04R2430/01 , H04S7/308 , H05B37/029
Abstract: 一种连续时间D类调制器，在前向路径中具有嵌入式可编程逻辑装置。FPGA经配置以：通过导出用于所述调制器的同步时钟且监测1位PWM信号是否有同步锁定状态而提供同步控制；监测PWM占空比以检测过量状况且降低音频水平以消除硬削波事件；针对后续输出级实施死区带定时；使用可编程延迟线动态地控制所述1位PWM所见的净环路延迟；监测放大器输出状况以提供与所述1位PWM的比较或确定负载特性；监测前端积分器以为了最优失真(THD+N)进行修整。音频放大器的输出电路，其具有：模拟滤波器级，其包括电感器/电容器LC电路；物理连接器，其用于连接扬声器；经调谐谐振电路，其经配置以在所述输出电路上的开放负载的情况下通过提供所述LC电路的自然谐振或所述输出电路中的高频振荡的阻尼而提供用于所述输出电路的低阻抗负载；以及谐振频率检测，其耦合到所述LCR电路的输出以检测自然谐振振荡或所述高频振荡状况中的一个。所述经调谐谐振电路对在所述输出滤波器之后具有反馈的闭环D类放大器提供调制控制。
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公开(公告)号：US20100134184A1
公开(公告)日：2010-06-03
申请号：US12325572
申请日：2008-12-01
Applicant: GEORGE R. SARKEES , LEE V. NAGLE
Inventor： GEORGE R. SARKEES , LEE V. NAGLE
IPC: H03G3/20
CPC classification number: H03G3/3042 , H03G2201/208
Abstract: A hybrid power control system (102) that selectively applies voltage-based gain control and current-based gain control and method (300) of controlling a power amplifier (104) gain are presented. A voltage-based gain control signal (120) is applied to control the gain of the power amplifier when a level output power is indicated by a power contour signal (132). Whether the power amplifier is saturated is identified. A current-based gain control signal (122) is applied to control the gain of the power amplifier when the power amplifier is saturated and a decrease in output power is indicated by the power contour signal.
Abstract translation: 提出了选择性地施加基于电压的增益控制和基于电流的增益控制的混合功率控制系统（102）和控制功率放大器（104）增益的方法（300）。 当功率轮廓信号（132）指示电平输出功率时，施加基于电压的增益控制信号（120）来控制功率放大器的增益。 识别功率放大器是否饱和。 施加基于电流的增益控制信号（122）以在功率放大器饱和时控制功率放大器的增益，并且由功率轮廓信号指示输出功率的降低。
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公开(公告)号：US07859334B2
公开(公告)日：2010-12-28
申请号：US12325572
申请日：2008-12-01
Applicant: George R. Sarkees , Lee V. Nagle
Inventor： George R. Sarkees , Lee V. Nagle
IPC: H03G3/20
CPC classification number: H03G3/3042 , H03G2201/208
Abstract: A hybrid power control system (102) that selectively applies voltage-based gain control and current-based gain control and method (300) of controlling a power amplifier (104) gain are presented. A voltage-based gain control signal (120) is applied to control the gain of the power amplifier when a level output power is indicated by a power contour signal (132). Whether the power amplifier is saturated is identified. A current-based gain control signal (122) is applied to control the gain of the power amplifier when the power amplifier is saturated and a decrease in output power is indicated by the power contour signal.
Abstract translation: 提出了选择性地施加基于电压的增益控制和基于电流的增益控制的混合功率控制系统（102）和控制功率放大器（104）增益的方法（300）。 当功率轮廓信号（132）指示电平输出功率时，施加基于电压的增益控制信号（120）来控制功率放大器的增益。 识别功率放大器是否饱和。 施加基于电流的增益控制信号（122）以在功率放大器饱和时控制功率放大器的增益，并且由功率轮廓信号指示输出功率的降低。
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公开(公告)号：US20050206447A1
公开(公告)日：2005-09-22
申请号：US10803771
申请日：2004-03-18
Applicant: Ryo Yamazaki , William Noellert
Inventor： Ryo Yamazaki , William Noellert
CPC classification number: H03F1/52 , H03G3/004 , H03G3/3047 , H03G2201/103 , H03G2201/206 , H03G2201/208 , H03G2201/307 , H03G2201/708
Abstract: When a power amplifier control loop operates near or in saturation, the quality of the output signal can be degraded and an over current condition can occur. To prevent this, the output signal of the power amplifier is detected, converted to digital, and then converted into the frequency spectrum by means of a Fast Fourier Transform. The spectral characteristics of the output signal are analyzed to determine if the power amplifier control loop is approaching or operating in saturation mode. This determination is made by looking at the power of the output signal at various frequencies. If the output at these frequencies exceeds a threshold value, the power amplifier control loop is approaching saturation. In this situation, the output of the power amplifier can be adjusted to prevent loop saturation. This can be accomplished by reducing the supply voltage to the power amplifier or adjusting the bias voltage.
Abstract translation: 当功率放大器控制回路在接近或饱和状态下工作时，输出信号的质量可能会下降，可能会出现过电流状态。 为了防止这种情况，功率放大器的输出信号被检测，转换为数字，然后通过快速傅里叶变换转换成频谱。 分析输出信号的频谱特性，以确定功率放大器控制环路是否接近或在饱和模式下工作。 通过查看各种频率的输出信号的功率来进行该确定。 如果这些频率的输出超过阈值，则功率放大器控制回路接近饱和。 在这种情况下，可以调节功率放大器的输出，以防止环路饱和。 这可以通过降低功率放大器的电源电压或调整偏置电压来实现。
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5.发明公开
公开(公告)号：EP3408936A2
公开(公告)日：2018-12-05
申请号：EP17703640.7
申请日：2017-01-27
Applicant: Dolby Laboratories Licensing Corporation
Inventor： VOGEL, Erich H , BUTLER, JOEL A. , REVELLI, Luca
IPC: H03F3/217 , H04S7/00 , H04R5/00 , H04R29/00 , H03G3/30 , H03G3/00 , H03F3/68 , H04R5/04 , H02M1/32 , H02M1/42 , H05B37/02 , H02M1/00 , H03F3/181
CPC classification number: H04R5/04 , H02M1/32 , H02M1/4225 , H02M1/4241 , H02M2001/007 , H02M2001/325 , H03F1/301 , H03F3/183 , H03F3/2173 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2200/447 , H03F2200/468 , H03F2203/45512 , H03F2203/45522 , H03F2203/45528 , H03G3/007 , H03G3/3005 , H03G2201/208 , H03G2201/708 , H04R29/007 , H04R2420/05 , H04R2430/01 , H04S7/308 , H05B37/029
Abstract: An integrated cinema amplifier a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides power to drive a plurality of channels corresponding to speaker feeds to a plurality of speakers. The amplifier has a front panel having an LED array with each LED associated with a respective channel or group of channels of the multi-channel amplifier, and a control unit configured to light the LEDs according to display patterns based on operating status or error conditions of the amplifier.
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Patent Agency Ranking6.发明申请
公开(公告)号：WO2017132583A2
公开(公告)日：2017-08-03
申请号：PCT/US2017/015459
申请日：2017-01-27
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： HEALY, Andrew , VOGEL, Erich H. , POULAIN, Andrew M. , LONG, Gregory J. , BUTLER, Joel A. , LUCE, Angela S. , REVELLI, Luca , NURMUKHANOV, Dossym , COOK, Tanner , TRAVERSO M., Marcelo
IPC: H04R5/04
CPC classification number: H04R5/04 , H03F1/301 , H03F3/183 , H03F3/2173 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2200/447 , H03F2200/468 , H03F2203/45512 , H03F2203/45522 , H03F2203/45528 , H03G3/3005 , H03G2201/208 , H03G2201/708 , H04R29/007 , H04R2420/05 , H04R2430/01 , H04S7/308 , H05B37/029
Abstract: An integrated cinema amplifier a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides power to drive a plurality of channels corresponding to speaker feeds to a plurality of speakers. The amplifier has a front panel having an LED array with each LED associated with a respective channel or group of channels of the multi-channel amplifier, and a control unit configured to light the LEDs according to display patterns based on operating status or error conditions of the amplifier.
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公开(公告)号：WO2010065243A3
公开(公告)日：2010-09-16
申请号：PCT/US2009063841
申请日：2009-11-10
Applicant: MOTOROLA INC , SARKEES GEORGE R , NAGLE LEE V
Inventor： SARKEES GEORGE R , NAGLE LEE V
CPC classification number: H03G3/3042 , H03G2201/208
Abstract: A hybrid power control system (102) that selectively applies voltage-based gain control and current-based gain control and method (300) of controlling a power amplifier (104) gain are presented. A voltage-based gain control signal (120) is applied to control the gain of the power amplifier when a level output power is indicated by a power contour signal (132). Whether the power amplifier is saturated is identified. A current-based gain control signal (122) is applied to control the gain of the power amplifier when the power amplifier is saturated and a decrease in output power is indicated by the power contour signal.
Abstract translation: 呈现了选择性地施加基于电压的增益控制和基于电流的增益控制的混合电力控制系统（102）以及控制功率放大器（104）增益的方法（300）。 当由功率轮廓信号（132）指示电平输出功率时，施加基于电压的增益控制信号（120）以控制功率放大器的增益。 识别功率放大器是否饱和。 当功率放大器饱和时，基于电流的增益控制信号（122）被用于控制功率放大器的增益，并且由功率轮廓信号指示输出功率的减小。
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8.发明申请
公开(公告)号：WO2017132594A2
公开(公告)日：2017-08-03
申请号：PCT/US2017/015476
申请日：2017-01-27
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： HEALY, Andrew , VOGEL, Erich H. , POULAIN, Andrew M. , LONG, Gregory J. , BUTLER, Joel A. , LUCE, Angela S. , REVELLI, Luca , NURMUKHANOV, Dossym , COOK, Tanner , TRAVERSO M., Marcelo
IPC: H03F3/217
CPC classification number: H04R5/04 , H03F1/301 , H03F3/183 , H03F3/2173 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2200/447 , H03F2200/468 , H03F2203/45512 , H03F2203/45522 , H03F2203/45528 , H03G3/3005 , H03G2201/208 , H03G2201/708 , H04R29/007 , H04R2420/05 , H04R2430/01 , H04S7/308 , H05B37/029
Abstract: A continuous time Class-D modulator with an embedded programmable logic device in a forward path. The FPGA is configured to provide synchronization control by deriving a synchronization clock for the modulator and monitoring a 1-bit PWM signal for sync-lock status; monitoring the PWM duty cycle to detect overage conditions and lowering audio levels to eliminate hard-clipping events; implementing dead-band timing for subsequent output stages; dynamically controlling the net loop delay seen by the 1-bit PWM using programmable delay lines; monitoring amplifier output conditions to provide comparison with the 1-bit PWM or determine load characteristics; monitoring a front-end integrator to trim for optimal distortion (THD+N). An output circuit of an audio amplifier having an analog filter stage comprising an inductor/capacitor (LC) circuit, a physical connector for connecting a speaker, a tuned resonant circuit configured to provide a low-impedance load for the output circuit in the event of an open load on the output circuit by providing damping of a natural resonance of the LC circuit or of high-frequency oscillations in the output circuit, and a resonant frequency detection coupled to the output of the LCR circuit to detect one of a natural resonance oscillation or the high- frequency oscillation condition. The tuned resonant circuit provides modulation control to a closed-loop Class D amplifier with feedback after the output filter.
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公开(公告)号：WO2010065243A2
公开(公告)日：2010-06-10
申请号：PCT/US2009/063841
申请日：2009-11-10
Applicant: MOTOROLA, INC. , SARKEES, George R., , NAGLE, Lee V.,
Inventor： SARKEES, George R., , NAGLE, Lee V.,
CPC classification number: H03G3/3042 , H03G2201/208
Abstract: A hybrid power control system (102) that selectively applies voltage-based gain control and current-based gain control and method (300) of controlling a power amplifier (104) gain are presented. A voltage-based gain control signal (120) is applied to control the gain of the power amplifier when a level output power is indicated by a power contour signal (132). Whether the power amplifier is saturated is identified. A current-based gain control signal (122) is applied to control the gain of the power amplifier when the power amplifier is saturated and a decrease in output power is indicated by the power contour signal.
Abstract translation: 提出了选择性地施加基于电压的增益控制和基于电流的增益控制的混合功率控制系统（102）和控制功率放大器（104）增益的方法（300）。 当功率轮廓信号（132）指示电平输出功率时，施加基于电压的增益控制信号（120）来控制功率放大器的增益。 识别功率放大器是否饱和。 施加基于电流的增益控制信号（122）以在功率放大器饱和时控制功率放大器的增益，并且由功率轮廓信号指示输出功率的降低。
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公开(公告)号：KR1020090118458A
公开(公告)日：2009-11-18
申请号：KR1020080044257
申请日：2008-05-14
Applicant: 유수엽
Inventor： 유수엽
CPC classification number: H04R3/002 , H02J3/12 , H03G3/20 , H03G2201/208
Abstract: PURPOSE: A power supply unit of a variable load active type amplifier is provided to obtain a maximum output from a speaker by outputting the maximum output corresponding to a resistance value of a speaker load. CONSTITUTION: A power supply unit(400) of a variable load active type amplifier includes a power converting part(411,412), a data table(420), and a control part(430). The power converting part converts a power supplied from a power supply part(100) into a necessary power according to a control signal. The data table stores a supply power data corresponding to a load resistance value of a speaker(300) connected to an amplifier(200). The control part receives the load resistance value. The control part accesses the supply power data corresponding to the load resistance value from the data table. The control part outputs a control signal to the power converting part in order to supply the supply power data to a load.
Abstract translation: 目的：提供可变负载有源放大器的电源单元，通过输出与扬声器负载的电阻值对应的最大输出，从扬声器获得最大输出。 构成：可变负载有源放大器的电源单元（400）包括功率转换部（411,412），数据表（420）和控制部（430）。 功率转换部根据控制信号将从电源部（100）供给的电力转换成必需的电力。 数据表存储与连接到放大器（200）的扬声器（300）的负载电阻值对应的供电电力数据。 控制部接收负载电阻值。 控制部件从数据表访问与负载电阻值对应的供电电力数据。 控制部分向电力转换部分输出控制信号，以将供电功率数据提供给负载。
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