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公开(公告)号：US20020071298A1
公开(公告)日：2002-06-13
申请号：US09911812
申请日：2001-07-24
发明人： John D. Pennell
IPC分类号： H02M001/00
摘要： An AC-to-DC converter obtains phase and amplitude signal information from a displacement transducer that is excited by an AC excitation signal and provides an AC sensor signal indicative of transducer position. The converter includes a first rectifier circuit that receives and sums the AC excitation signal and the AC sensor signal, and rectifies the sum to provide a rectified summed excitation and input signal indicative thereof. A second rectifier circuit receives and rectifies the AC excitation signal, and provides a rectified excitation signal indicative thereof. A summing circuit computes the difference between the rectified summed excitation and input signal and the rectified excitation signal, and provides a signed DC signal indicative of displacement transducer position. Advantageously, the AC-to-DC converter of the present invention performs summing and difference functions directly and provides a signed DC signal representative of the AC amplitude and phase input of the transducer output, thus eliminating the need for an analog-to-digital converter (ADC) and the support of an associated processor.
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公开(公告)号：US20010048123A1
公开(公告)日：2001-12-06
申请号：US09862069
申请日：2001-05-21
发明人： David R. Thomas
IPC分类号： H01L029/80
CPC分类号： H04R1/005
摘要： A high performance unary digital loudspeaker system is disclosed; providing cost-effective and efficient performance, and providing the option to integrate multiple speaker elements or other related circuitry, and comprising a semiconductor substrate (102), an electrode (104) disposed upon the substrate, an insulator element (106) disposed upon the electrode forming a frame of material, an electrically conductive membrane (108) disposed upon the insulator element so as to form a chamber (110) between the electrode and the membrane, the membrane having a flexible support section (112) formed therein, and a control circuit (200) coupled (114, 116) to the membrane and the electrode, and adapted to provide a variable potential therebetween.
摘要翻译： 公开了一种高性能一元数字扬声器系统; 提供成本有效和高效的性能，并且提供集成多个扬声器元件或其他相关电路的选项，并且包括半导体衬底（102），设置在衬底上的电极（104），设置在衬底上的绝缘体元件（106） 形成框架的电极，设置在所述绝缘体元件上以在所述电极和膜之间形成室（110）的导电膜（108），所述膜具有形成在其中的柔性支撑部分（112），以及 控制电路（200）耦合到膜和电极（114,116），并且适于在其间提供可变电位。
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33.发明申请Earphone-type music reproducing device and music reproducing system using the device 审中-公开耳机式音乐再现装置和使用该装置的音乐再现系统公开(公告)号：US20010003542A1
公开(公告)日：2001-06-14
申请号：US09725400
申请日：2000-11-29
发明人： Kazunori Kita
IPC分类号： H04R001/02
CPC分类号： H04R1/1041 , H04R1/005
摘要： An headphone-type music reproducing device and music reproducing system bearable even during a user's exercise for use and capable of reproducing desired music easily and rapidly by manipulating a wristband-type remote control device worn on the user's wrist. In the headphone-type music reproducing device, a memory card which prestores music data is removable set in a headphone body born over the user's ears. A music data decoder provided within the body reproduces a music signal based on the music data stored in the memory card. When a radio transmission/reception unit receives a remote control signal sent by a wristband-type remote control device, the headphone-type music reproducing device reproduces and/or stops music based on the music signal in accordance with the received remote control signal.
摘要翻译： 耳机型音乐再现装置和音乐再现系统即使在用户的使用锻炼期间也可以承受，并且能够通过操纵佩戴在使用者的手腕上的腕带式遥控装置来容易且快速地再现期望的音乐。 在耳机型音乐再现装置中，预先存储音乐数据的存储卡可移动设置在耳机体内，该头戴耳机体在用户的耳朵上。 设置在体内的音乐数据解码器基于存储在存储卡中的音乐数据再现音乐信号。 当无线电发送/接收单元接收到由腕带式遥控装置发送的遥控信号时，耳机式音乐再现装置根据所接收的遥控信号，基于音乐信号再现和/或停止音乐。
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公开(公告)号：US06185627B2
公开(公告)日：2001-02-06
申请号：US09131543
申请日：1998-08-10
申请人： John L. Baker , Mark Rapaich
发明人： John L. Baker , Mark Rapaich
IPC分类号： G06F1310
CPC分类号： H04R1/005 , G11B20/10527
摘要： A method and apparatus for selectively sending a first signal or a second signal to an output signal are described. An electrical characteristic of a device coupled to the output is determined, and, in the event the electrical characteristic is determined to be a predetermined value, the first signal to the output, otherwise, the second signal is sent. A detector coupled to the output of an information handling system detects a characteristic of a device coupled to the output. The characteristic is indicative of the type of signal sent to the output. A first type of signal is sent to the output when the characteristic has a predetermined value and a second type of signal is sent to the output when the characteristic does not have the predetermined value. Whether a speaker is an analog speaker or a digital speaker may be automatically determined, and an appropriate analog or digital signal is sent to the speaker depending upon its type.
摘要翻译： 描述用于向输出信号选择性地发送第一信号或第二信号的方法和装置。 确定耦合到输出的设备的电气特性，并且在电特性被确定为预定值的情况下，向输出提供第一信号，否则发送第二信号。 耦合到信息处理系统的输出的检测器检测耦合到输出的设备的特性。 该特性表示发送到输出端的信号的类型。 当特性具有预定值并且当特性不具有预定值时将第二类型的信号发送到输出时，将第一类型的信号发送到输出。 可以自动确定扬声器是模拟扬声器还是数字扬声器，并且根据其类型将适当的模拟或数字信号发送到扬声器。
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公开(公告)号：US5912978A
公开(公告)日：1999-06-15
申请号：US979754
申请日：1997-11-26
CPC分类号： H04R1/005
摘要： A loudspeaker comprises a yoke; one or more vibration driving coils disposed so as to interact magnetically with the yoke when an electrical current flows through the coils; and one or more signal amplifying devices mounted on or near the yoke, the amplifying devices being operable to receive an input audio signal, to amplify the input signal to generate an amplified signal, and to supply the amplified signal to the vibration driving coils.
摘要翻译： 扬声器包括一个轭; 一个或多个振动驱动线圈，其设置成当电流流经线圈时与轭铁磁耦合; 以及安装在磁轭上或附近的一个或多个信号放大装置，放大装置可操作以接收输入音频信号，放大输入信号以产生放大信号，并将放大的信号提供给振动驱动线圈。
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公开(公告)号：US5886656A
公开(公告)日：1999-03-23
申请号：US653427
申请日：1996-05-24
摘要： A microphone device having input terminals for receiving an input analog signal and output terminals to produce an output digital signal. The microphone device includes a converter circuit having input terminals coupled to the input terminals of the microphone device and an output terminal coupled to the output terminals of the microphone and an output terminal coupled to the output terminals of the microphone device. The device includes an analog input interface having input terminals corresponding to the input terminals of the microphone device and first and second output terminals to produce an amplified analog voltage signal, a converter circuit having first and second input terminals corresponding respectively to the first and the second output terminals of the analog input interface and an output terminal to produce a digital voltage signal and a parallel to serial digital output interface having an input terminal corresponding to the output terminal of the converter circuit and output terminals corresponding to the output terminals of the microphone device. The converter circuit desirably includes a signal modulator circuit having an input terminal coupled to the input terminals of the converter circuit and an output terminal to produce an intermediate digital voltage signal and a signal sampler circuit having an input terminal corresponding to the output terminal of the signal modulator circuit and an output terminal corresponding to the output terminal of the converter circuit.
摘要翻译： 麦克风装置具有用于接收输入模拟信号的输入端和输出端以产生输出数字信号。 麦克风装置包括转换器电路，其具有耦合到麦克风装置的输入端的输入端和耦合到麦克风的输出端的输出端和耦合到麦克风装置的输出端的输出端。 该装置包括模拟输入接口，其具有与麦克风装置的输入端相对应的输入端和第一和第二输出端以产生放大的模拟电压信号;转换器电路，具有分别对应于第一和第二输入端的第一和第二输入端 模拟输入接口的输出端和输出端产生数字电压信号和并行到串行数字输出接口，其具有对应于转换器电路的输出端的输入端和与麦克风装置的输出端对应的输出端 。 转换器电路理想地包括信号调制器电路，其具有耦合到转换器电路的输入端的输入端和产生中间数字电压信号的输出端和具有对应于信号的输出端的输入端的信号采样电路 调制器电路和对应于转换器电路的输出端的输出端子。
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公开(公告)号：US5592559A
公开(公告)日：1997-01-07
申请号：US920888
申请日：1992-07-28
申请人： Ryutaro Takahashi , Toru Hayase
发明人： Ryutaro Takahashi , Toru Hayase
CPC分类号： H04L25/4902 , H04R1/005 , H04R3/00
摘要： A speaker driving circuit including a switch which switches the supplying of current to a speaker on and off by using a binary pulse-density-modulated (PDM) signal produced by .DELTA..SIGMA.-modulating a digital audio signal from a digital low-pass filter. For example, when the PDM signal is "1", the switch causes the output current of the direct-current power source to flow to the voice coil. On the other hand, when the PDM signal is "0", the switch stops the current to flow to the voice coil. This switch may be replaced with a switch which switches the direction of current flowing through the voice coil. The diaphragm of the speaker is driven by controlling the supplying of current in such a manner. With this arrangement, since a D/A converter for a digital audio signal is not required, there is no need to install an amplification circuit for an analog signal. Thus, the speaker driving circuit has a simplified structure but is capable of driving the speaker stably.
摘要翻译： 一种扬声器驱动电路，其包括通过使用由DELTA SIGMA产生的二进制脉冲密度调制（PDM）信号来切换向扬声器提供电流的开关，该信号由数字低通滤波器调制数字音频信号。 例如，当PDM信号为“1”时，开关使直流电源的输出电流流到音圈。 另一方面，当PDM信号为“0”时，开关停止电流流向音圈。 该开关可以用切换流过音圈的电流的方向的开关代替。 通过以这种方式控制电流的供给来驱动扬声器的振膜。 利用这种布置，由于不需要用于数字音频信号的D / A转换器，因此不需要安装用于模拟信号的放大电路。 因此，扬声器驱动电路具有简化的结构，但能够稳定地驱动扬声器。
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公开(公告)号：US5400414A
公开(公告)日：1995-03-21
申请号：US678351
申请日：1992-02-14
CPC分类号： G03B21/56 , H04N5/642 , H04R1/02 , H04R17/005 , H04R1/005
摘要： An electromechanical transducer made of a piezo-polymer film is presented. The film is transparent and is applied to a television screen, glass pane of a framed picture, or the like. The piezo-polymer film is arranged to provide a plurality of loudspeakers of a television apparatus which can be controlled by a digital audio signal.
摘要翻译： PCT No.PCT / EP89 / 01076 Sec。 371日期：1992年2月14日 102（e）1992年2月14日PCT PCT 1989年9月26日PCT公布。 第WO90 / 03711号公报 日期：1990年04月5日。介绍了一种由压电聚合物膜制成的机电换能器。 这部电影是透明的，并且被应用于电视屏幕，框架图片的玻璃板等。 压电聚合物膜被布置成提供可以由数字音频信号控制的电视设备的多个扬声器。
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公开(公告)号：US5347587A
公开(公告)日：1994-09-13
申请号：US956358
申请日：1992-10-05
CPC分类号： H03F3/2175 , H04R1/005 , H04R3/00 , H03F2200/331
摘要： A speaker driving device applies a constant voltage of a constant voltage source to a pair of voice coils alternatively by switching the direction of applying the constant voltage based on a binary PDM signal. A .DELTA..SIGMA. modulator produces the binary PDM signal by .DELTA..SIGMA.-modulating a digital audio signal from a digital low-pass filter. The constant voltage is applied to a first voice coil in one direction and is applied to a second voice coil in the reverse direction by switching the direction of applying the constant voltage. The first and second voice coils forms the pair of voice coils. This arrangement causes a current to flow through the first and second voice coils in opposite directions and a diaphragm of a speaker to be driven in two directions opposite to each other. As a result, the speaker is driven more efficiently. Moreover, since the switching of the direction of applying the constant voltage is performed by changing the connections between the constant voltage source and the pair of voice coils, a switching circuit with a simplified structure is used.
摘要翻译： 扬声器驱动装置通过基于二进制PDM信号切换施加恒定电压的方向，将恒定电压源的恒定电压交替地施加到一对音圈。 DELTA SIGMA调制器通过DELTA SIGMA产生二进制PDM信号，从数字低通滤波器调制数字音频信号。 恒定电压在一个方向施加到第一音圈，并且通过切换施加恒定电压的方向在相反方向上施加到第二音圈。 第一和第二音圈形成一对音圈。 这种布置使得电流在相反的方向上流过第一和第二音圈，并且扬声器的振膜在彼此相反的两个方向上被驱动。 因此，扬声器的驱动效率更高。 此外，由于通过改变恒压源与一对音圈之间的连接来进行施加恒定电压的方向的切换，所以使用具有简化结构的开关电路。
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公开(公告)号：US4422182A
公开(公告)日：1983-12-20
申请号：US354702
申请日：1982-03-04
申请人： Hideyuki Kenjyo
发明人： Hideyuki Kenjyo
CPC分类号： H04R1/005 , H04R23/008
摘要： A digital microphone for directly supplying a digital signal which designates the displacement of a diaphragm is disclosed. A cylindrical reflecting mirror is provided integrally with the diaphragm and reflects a band-shaped light beam to an array of photo electro transducers. A binary code pattern is formed in the surface of the mirror. The light beam is modulated by a variation of relative position of the code pattern and the light beam. The modulated light beam is transduced into the digital signal by the array of photo electro transducers.
摘要翻译： 公开了一种用于直接提供指定隔膜的位移的数字信号的数字麦克风。 圆柱形反射镜与隔膜一体设置，并将带状光束反射到光电换能器阵列。 在镜子的表面形成二进制代码图案。 光束被代码图案和光束的相对位置的变化调制。 调制光束通过光电转换器阵列转换成数字信号。
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