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1. 发明授权

US11783984B2 Inductor apparatus optimized for low power loss in class-D audio amplifier applications and method for making the same 有权
公开(公告)号：US11783984B2
公开(公告)日：2023-10-10
申请号：US16436522
申请日：2019-06-10
申请人： Crestron Electronics, Inc.
发明人： Robert N. Buono
IPC分类号： H01F17/04 , H01F41/02 , H01F41/061 , H03F3/217 , H03H7/01
CPC分类号： H01F17/045 , H01F41/0206 , H01F41/061 , H03F3/217 , H03H7/0115 , H01F2017/046 , H03F2200/03 , H03F2200/333
摘要： An inductor is provided, comprising: a first ferrite core piece and a second ferrite core piece, each of which are made of substantially similar materials, exhibit desired electromagnetic properties, and which are fashioned in a substantially similar manner and shape, and wherein each of the first and second ferrite core pieces comprises a substantially planar mating surface, a center post, and a wire core assembly channel, and wherein a first substantially planar mating surface of the first ferrite core piece is adapted to planarly mate with a second substantially planar mating surface of the second ferrite core piece; and a wire core assembly adapted to be substantially self-locating and self-centering about a first or second center post when located in a respective first or second wire core assembly channel.

2. 发明申请

US20190222182A1 Class D Amplifier 审中-公开
公开(公告)号：US20190222182A1
公开(公告)日：2019-07-18
申请号：US16363300
申请日：2019-03-25
申请人： Yamaha Corporation
发明人： Takeshi TOGAWA , Masao NORO
IPC分类号： H03F3/217
CPC分类号： H03F3/217 , H03F2200/03 , H03F2200/171 , H03F2200/333 , H03F2200/351
摘要： A class D amplifier includes a self-oscillating class D amplification circuit that is driven by an output current signal; and a voltage-current converting circuit that outputs an output current signal in response to an input signal voltage and an output signal voltage from a feedback signal voltage.

3. 发明申请

US20170179883A1 MULTIMODE VOLTAGE CONTROLLED OSCILLATOR 审中-公开
公开(公告)号：US20170179883A1
公开(公告)日：2017-06-22
申请号：US15187710
申请日：2016-06-20
申请人： QUALCOMM Incorporated
发明人： Jun Tan
IPC分类号： H03B5/12 , H03F3/24 , H03G3/30 , H03F3/19
CPC分类号： H03B5/1243 , H03B5/00 , H03B5/12 , H03B5/1212 , H03B5/1215 , H03B5/1228 , H03B5/1265 , H03B5/1296 , H03B2200/009 , H03F3/19 , H03F3/24 , H03F3/245 , H03F2200/165 , H03F2200/171 , H03F2200/294 , H03F2200/333 , H03F2200/451 , H03G3/3042 , H03L7/099
摘要： Features and advantages of the present disclosure include a multimode voltage controlled oscillator (VCO). In one embodiment, a circuit comprises a VCO, first and second transistors, and first and second capacitive attenuators. The first and second transistors are cross coupled through the attenuators. In a first mode, the first and second transistors are turned off, and the capacitive attenuators attenuate a signal on output terminals of the VCO at control inputs of the first and second transistors. In another mode, the first and second transistors are turned on, and the capacitive attenuation is reduced or turned off so that control inputs of the first and second transistors receive signals on the outputs of the VCO.

4. 发明授权

US09531330B2 Low noise amplifier for multiple channels 有权
公开(公告)号：US09531330B2
公开(公告)日：2016-12-27
申请号：US14718328
申请日：2015-05-21
申请人： Analog Devices, Inc.
发明人： Howard R. Samuels
IPC分类号： H03F3/68 , H03F1/26 , G01P15/125 , G01P15/18 , H03F3/45 , H03F3/04 , G01P15/08
CPC分类号： H03F1/26 , G01P15/125 , G01P15/18 , G01P2015/082 , H03F3/04 , H03F3/45071 , H03F3/45475 , H03F3/68 , H03F2200/129 , H03F2200/171 , H03F2200/261 , H03F2200/333 , H03F2203/45512 , H03F2203/45544
摘要： An amplifier system has an amplifier for amplifying a plurality of input signals from a plurality of different channels, and a plurality of demodulators each operatively coupled with the amplifier for receiving amplified input signals from the amplifier. Each demodulator is configured to demodulate a single amplified input channel signal from a single channel of the plurality of different channels. The system thus also has a plurality of filters, coupled with each of the demodulators, for mitigating the noise.

5. 发明授权

US09473087B2 Class-D amplifier circuits 有权
标题翻译： D类放大器电路
公开(公告)号：US09473087B2
公开(公告)日：2016-10-18
申请号：US14521191
申请日：2014-10-22
申请人： Wolfson Microelectronics Ltd.
发明人： John Paul Lesso , Toru Ido
IPC分类号： H03F3/38 , H03F3/217 , H03F1/02
CPC分类号： H03F3/2171 , H03F1/0211 , H03F3/187 , H03F3/217 , H03F2200/165 , H03F2200/171 , H03F2200/333 , H03F2200/351 , H03G1/0088
摘要： Methods and apparatus for Class-D amplifier circuits with improved power efficiency. The circuit has an output stage with at least first and second switches and a modulator that receives an input signal to be amplified, SIN, and a first clock signal fSW. The modulator controls the duty cycles of the first and second switches, within a switching cycle based on the input signal, wherein the switching cycle has a switching frequency based on the first clock signal. A frequency controller controls the frequency of the first clock signal in response to an indication of the amplitude of the input signal so as to provide a first switching frequency at a first input signal amplitude and a second, lower, switching frequency at a second, lower, input signal amplitude. A lower switching frequency can be tolerated at low signal amplitudes and varying the switching frequency in this way thus maintains stability whilst reducing switching power losses.
摘要翻译：具有提高功率效率的D类放大器电路的方法和装置。电路具有至少具有第一和第二开关的输出级和接收要被放大的输入信号SIN和第一时钟信号fSW的调制器。调制器基于输入信号在开关周期内控制第一和第二开关的占空比，其中开关周期具有基于第一时钟信号的开关频率。频率控制器响应于输入信号的幅度的指示来控制第一时钟信号的频率，以便提供第一输入信号幅度的第一开关频率和在第二输入信号幅度下的第二，较低开关频率，输入信号幅度。在低信号幅度下可以容忍较低的开关频率，并且以这种方式改变开关频率，从而在降低开关功率损耗的同时保持稳定性。

6. 发明授权

US09379679B2 Self-oscillating class-D amplifier and self-oscillating frequency control method for self-oscillating class-D amplifier 有权
标题翻译：自振D类放大器和自振荡D类放大器的自振频率控制方法
公开(公告)号：US09379679B2
公开(公告)日：2016-06-28
申请号：US14356148
申请日：2012-11-02
申请人： Yamaha Corporation
发明人： Masao Noro
IPC分类号： H03F3/38 , H03F3/217 , H03L7/081 , H03K5/00
CPC分类号： H03F3/217 , H03F2200/333 , H03K2005/00032 , H03L7/0812
摘要： A self-oscillation frequency varying element for varying the self-oscillation frequency of a self-oscillation loop of a self-oscillating class-D amplifier is placed in the self-oscillation loop. Frequency comparison, cycle comparison, or phase comparison is performed between a self-oscillation signal of the self-oscillating class-D amplifier or a signal corresponding to the self-oscillation signal and a reference frequency signal having a prescribed reference frequency. Alternatively, information corresponding to a frequency or a cycle of a self-oscillation signal of the self-oscillating class-D amplifier or a signal corresponding to the self-oscillation signal is compared with information corresponding to a prescribed reference frequency or reference cycle. The self-oscillation frequency varying element is controlled in accordance with a result of the comparison, whereby the frequency of the self-oscillation signal or the signal corresponding to the self-oscillation signal is caused to follow the frequency of the reference frequency signal.
摘要翻译：用于改变自振荡D类放大器的自振荡环路的自振频率的自振频率变化元件置于自振荡环路中。在自振荡D类放大器的自振荡信号或与自振荡信号相对应的信号和具有规定参考频率的参考频率信号之间进行频率比较，周期比较或相位比较。或者，将与自振荡D类放大器的自振荡信号的频率或周期相对应的信息或对应于自振荡信号的信号与对应于规定的参考频率或参考周期的信息进行比较。根据比较结果控制自振频率变化元件，从而使自振荡信号的频率或与自振荡信号对应的信号跟随参考频率信号的频率。

7. 发明授权

US09319247B2 Method and device for broadband high isolation coupling 有权
标题翻译：宽带高隔离耦合的方法和装置
公开(公告)号：US09319247B2
公开(公告)日：2016-04-19
申请号：US14418841
申请日：2012-10-17
申请人： Rohde & Schwarz GmbH & Co. KG
发明人： Nenad Stojaković , Reiner Franke
IPC分类号： H04L25/02 , H03F1/42 , H03F3/38 , H04L25/08
CPC分类号： H04L25/0266 , H03F1/42 , H03F3/38 , H03F2200/333 , H03F2200/429 , H04L25/0268 , H04L25/085
摘要： An isolation coupler comprises a frequency splitter (36) for splitting an input signal (1) into a low frequency partial signal (2) and a high frequency partial signal (4) and a first isolating transformer (33) for transforming a signal derived from the high frequency partial signal (4) in a transformed high frequency partial signal (5). Moreover it may include a modulator (21) for modulating the low frequency partial signal (2) with a modulation signal (6) resulting in a modulated low frequency partial signal (7) and a second isolating transformer (34) for transforming a signal derived from the modulated low frequency partial signal (7) in a transformed low frequency partial signal (8).
摘要翻译：隔离耦合器包括用于将输入信号（1）分成低频部分信号（2）和高频部分信号（4）的分频器（36）和用于变换从变换的高频部分信号（5）中的高频部分信号（4）。此外，它可以包括用调制信号（6）调制低频部分信号（2）的调制器（21），该调制信号（6）产生调制的低频部分信号（7）和用于变换所产生的信号的第二隔离变压器（34）在变换的低频部分信号（8）中从调制的低频部分信号（7）获得。

8. 发明授权

US09246465B2 Mixer 有权
标题翻译：混合器
公开(公告)号：US09246465B2
公开(公告)日：2016-01-26
申请号：US14525758
申请日：2014-10-28
申请人： NXP B.V.
发明人： Robert Hendrikus Margaretha van Veldhoven
IPC分类号： G06G7/12 , G06F7/44 , H03H7/075 , H03D7/12 , H03D7/14 , H03F3/45 , H03F3/72
CPC分类号： H03H7/075 , H03D7/125 , H03D7/1441 , H03D7/1466 , H03D2200/0074 , H03D2200/0086 , H03F3/45071 , H03F3/72 , H03F2200/333
摘要： A mixer comprising a ladder having at least two resistances arranged in series and an input configured to receive an input signal and apply it across the ladder, said ladder including an output arrangement comprising at least three branches, a first branch branching from a first end of the ladder, a second branch branching from between the at least two resistances and a third branch branching from a second end of the ladder, opposite the first end, each branch including a switch for controlling a connection between its branch and an output.
摘要翻译：一种混合器，包括具有串联布置的至少两个电阻的梯子和被配置为接收输入信号并将其施加到梯子上的输入端，所述梯形图包括输出装置，所述输出装置包括至少三个分支，第一分支从第一端梯子，从所述至少两个电阻之间分支的第二分支和从所述梯子的第二端分支的与所述第一端相对的第三分支，每个分支包括用于控制其分支和输出之间的连接的开关。

9. 发明授权

US09246446B2 Chopper amplifier 有权
标题翻译：斩波放大器
公开(公告)号：US09246446B2
公开(公告)日：2016-01-26
申请号：US14248452
申请日：2014-04-09
申请人： Takeshi Nagahisa
发明人： Takeshi Nagahisa
IPC分类号： H03F1/02 , H03F3/185 , H03F3/393 , H03F3/45
CPC分类号： H03F3/185 , H03F3/393 , H03F3/45995 , H03F2200/271 , H03F2200/333
摘要： A chopper amplifier includes a chopper modulator to modulate a certain detection signal and a bias voltage by a certain control signal and output a chopper modulation signal, a first differential amplifier to differentially amplify the chopper modulation signal from the chopper modulator and output a differential modulation signal, a chopper demodulator to demodulate the differential modulation signal from the first differential amplifier by the control signal and output a demodulation signal, a second differential amplifier to extract a detection signal component from the demodulation signal, and a plurality of filters connected at an input terminal of the second differential amplifier and having different cutoff frequencies from each other relative to the demodulation signal.
摘要翻译：斩波放大器包括斩波调制器，用于通过一定的控制信号调制特定的检测信号和偏置电压，并输出斩波调制信号;第一差分放大器，对斩波调制器的斩波调制信号进行差分放大，并输出差分调制信号，斩波解调器，用于通过控制信号解调来自第一差分放大器的差分调制信号，并输出解调信号;第二差分放大器，从解调信号中提取检测信号分量;以及多个滤波器，连接在输入端的第二差分放大器，并且相对于解调信号具有彼此不同的截止频率。

10. 发明申请

US20150237445A1 AUDIO SIGNAL CORRECTION AND CALIBRATION FOR A ROOM ENVIRONMENT 审中-公开
标题翻译：音频信号校正和室内环境校准
公开(公告)号：US20150237445A1
公开(公告)日：2015-08-20
申请号：US14706251
申请日：2015-05-07
申请人： AMX LLC
发明人： Fawad Nackvi
IPC分类号： H04R3/04
CPC分类号： H04R3/04 , A61F2002/765 , H03F1/06 , H03F3/181 , H03F3/189 , H03F3/66 , H03F2200/333 , H03F2200/348 , H03F2200/429 , H03F2200/451 , H03F2203/45264 , H03G5/165 , H04R1/20 , H04R1/22 , H04R1/227 , H04R1/24 , H04R1/26 , H04R9/18 , H04R11/14 , H04R15/02 , H04R17/10 , H04R25/353 , H04R25/48 , H04R25/558 , H04R2201/028 , H04R2205/021 , H04R2205/026 , H04R2227/005 , H04S7/307 , H04S2400/07
摘要： Disclosed are an apparatus and method of processing an audio signal to optimize audio for a room environment. One example method of operation may include recording the audio signal generated within a particular room environment and processing the audio signal to create an original frequency response based on the audio signal. The method may also include identifying a target sub-region of the frequency response which has a predetermined area percentage of a total area under a curve generated by the frequency response, determining whether the target sub-region is a narrow energy region, creating a filter to adjust the frequency response, and applying the filter to the audio signal.
摘要翻译：公开了一种处理音频信号以优化房间环境的音频的装置和方法。操作的一个示例方法可以包括记录在特定房间环境内生成的音频信号并处理音频信号以基于音频信号创建原始频率响应。该方法还可以包括识别频率响应的目标子区域，其具有由频率响应产生的曲线下的总面积的预定面积百分比，确定目标子区域是否为窄能区域，创建过滤器以调整频率响应，并将滤波器应用于音频信号。

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