公开(公告)号：US4403112A

公开(公告)日：1983-09-06

申请号：US265045

申请日：1981-05-18

申请人： Richard Modafferi

发明人： Richard Modafferi

IPC分类号： H04R1/22 ,  H04R1/28 ,  H04R3/14

CPC分类号： H04R3/04 ,  H04R1/227 ,  H04R3/14 ,  H04R1/2819 ,  H04R1/288

摘要： An audio speaker system is disclosed providing improved fidelity of performance from overdamped woofer drivers in small sealed enclosures. At least two woofer drivers are employed, and are driven electrically in such a manner that the phase difference in the electrical signals to the two drivers, or sets of drivers if more than two are employed, will be near zero at the lowest bass frequency and will increase to a value up to 180 degrees at the highest bass frequency which is generally taken as the woofer-midrange crossover frequency. This aforementioned phase difference in the electrical signal inputs to two sets of woofers common to one sealed enclosure improves over prior art by providing increased low-bass acoustic output, less acoustic wave interference between the woofers and the midrange drivers, and a smoother input impedance characteristic in the bass frequency region.

摘要翻译： 公开了一种音频扬声器系统，其在小密封外壳中提供了来自过阻尼低音扬声器驱动器的性能的改进的保真度。 使用至少两个低音扬声器驱动器，并且以这样的方式被驱动，即使用两个驱动器的电信号的相位差或者使用两个以上的驱动器组的相位差将在最低低音频率处接近零，并且 将在最高低音频率下增加到高达180度的值，通常将其作为低音扬声器 - 中频交叉频率。 对于一个密封外壳共同的两组低音单元的电信号输入的上述相位差通过提供增加的低低音声输出，低音扬声器和中频驱动器之间较少的声波干扰以及更平滑的输入阻抗特性而改进了现有技术 在低音频率区域。

公开(公告)号：US09485043B1

公开(公告)日：2016-11-01

申请号：US15164978

申请日：2016-05-26

申请人： Richard Modafferi

发明人： Richard Modafferi

IPC分类号： H04H20/88 ,  H04H20/71 ,  H03F3/181

CPC分类号： H04H20/88 ,  H03C5/00 ,  H03F3/187 ,  H03F3/245 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/324 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2203/45138 ,  H03F2203/45526 ,  H03F2203/45536 ,  H04H20/49

摘要： A modulation system for AM stereo transmission wherein in a combination of amplitude modulation and phase modulation allows a pair of unique audio channel signals to be modulated onto an AM carrier. When a monophonic audio signal is provided, there is no phase modulation present. However, when a first audio signal (e.g., a “right” channel) differs from a second audio signal (e.g., a “left” audio channel), phase modulation occurs simultaneously with amplitude modulation. The modulation system accepts non-matrixed audio signals and produces quadrature modulation compatible with the industry standard C-QUAM system.

摘要翻译： 用于AM立体声传输的调制系统，其中在幅度调制和相位调制的组合中，允许将一对唯一的音频信道信号调制到AM载波上。 当提供单声道音频信号时，不存在相位调制。 然而，当第一音频信号（例如，“右”声道）与第二音频信号（例如，“左”音频声道）不同时），相位调制与幅度调制同时发生。 调制系统接受非矩阵音频信号，并产生与行业标准C-QUAM系统兼容的正交调制。

公开(公告)号：US3984635A

公开(公告)日：1976-10-05

申请号：US557272

申请日：1975-03-11

申请人： Mioljub R. Nestorovic ,  Richard Modafferi

发明人： Mioljub R. Nestorovic ,  Richard Modafferi

IPC分类号： H04R1/24 ,  H04R1/26 ,  H04R3/14 ,  H04R1/28

CPC分类号： H04R1/24 ,  H04R1/26 ,  H04R3/14

摘要： An audio speaker system that provides enhanced fidelity of sound reproduction in the bass acoustic frequency range, by comprising a usual driven primary radiator, a pair of conductors for connecting the primary radiator to its energy source, a driven auxiliary radiator connected to that pair of conductors via a reactive network, both radiators being acoustically coupled by being housed in a closed cabinet common to both of them except for the respective separate diaphragm openings for each of said radiators, and the respective function and value of the individual component elements of said network relative to one another and the volume of the cabinet are such as to have the system operate on the bass-reflex principle.

摘要翻译： 一种音频扬声器系统，其通过包括通常的驱动初级辐射器，用于将初级辐射器与其能量源连接的一对导体，连接到该对导体的从动辅助散热器，在低音声频范围内提高声音再现的保真度 通过无功网络，两个散热器通过容纳在两个共同的闭合柜中而声耦合，除了用于每个所述辐射器的相应的单独的隔膜开口，以及所述网络相关的各个部件的相应功能和值 彼此之间，柜体的数量是使系统按低音反射原理运行。

公开(公告)号：US10701487B1

公开(公告)日：2020-06-30

申请号：US16452486

申请日：2019-06-25

申请人： Richard Modafferi

发明人： Richard Modafferi

IPC分类号： H04R3/04 ,  H04R3/12 ,  H04R3/14 ,  H04R1/22

摘要： Crossover networks modified to render audible colorations or frequency/phase emphases observed in some crossover networks of the prior art. Circuit topologies of prior art crossover networks are modified such that an additional pole appears in the transfer functions of one or more low-frequency pass crossover filters. In addition, the characteristic input impedance of one branch of the modified crossover network is reduced, typically to a value of approximately one-half the design characteristic impedance of the unmodified crossover networks.

公开(公告)号：US4918394A

公开(公告)日：1990-04-17

申请号：US328110

申请日：1989-03-23

申请人： Richard Modafferi

发明人： Richard Modafferi

IPC分类号： H03F1/30 ,  H03F5/00

CPC分类号： H03F5/00 ,  H03F1/30

摘要： The present invention is an audio frequency power amplifier input circuit having improved vacuum tube circuit topology. The improved circuit includes a direct current feedback circuit within the input circuitry which stabilizes the operating point of a phase inverter. The feedback circuit maintains optimum operation of the circuit despite variations in tube characteristics or supply voltages. Another aspect of the improved circuit comprises a low impedance phase inverter which improves the drive capability of the phase inverter to push-pull power output vacuum-tube grids.

摘要翻译： 本发明是具有改进的真空管电路拓扑的音频功率放大器输入电路。 改进的电路包括输入电路内的直流反馈电路，其稳定相位逆变器的工作点。 尽管管特性或电源电压有所变化，反馈电路保持电路的最佳操作。 改进电路的另一方面包括一个低阻抗相位逆变器，其提高了相位逆变器推拉功率输出真空管栅极的驱动能力。

公开(公告)号：US4771466A

公开(公告)日：1988-09-13

申请号：US108365

申请日：1987-10-13

申请人： Richard Modafferi

发明人： Richard Modafferi

IPC分类号： H04R3/14

CPC分类号： H04R3/14

摘要： A loudspeaker system includes at least two loudspeaker drivers, together with an electrical crossover network having filter circuits with at least two separate mutually exclusive frequency passbands. The filter circuits comprising the crossover network each possess brick-wall amplitude responses, i.e., passbands with very high band-edge amplitude vs. frequency response slops, on the order of 100 dB/octave in the better embodiments. The high passband band-edge slopes, which are realized by the inclusion of transmission zeros in the separate crossover filter transfer functions, takes together with further appropriate crossover filter transfer function synthesis causes the separate loudspeaker drivers comprising the loudspeaker system to function independently of one another in their contribution to total system acoustic output. It is shown that the loudspeaker system permits an accurate approximation to the ideal delay function in acoustic space, while minimizing acoustic wave interference among drivers operating in adjacent frequency band, and also reducing overall system nonlinear distortion.

摘要翻译： 扬声器系统包括至少两个扬声器驱动器，以及具有至少两个分离的相互排斥的频率通带的滤波器电路的电气交叉网络。 包括交叉网络的滤波器电路在更好的实施例中各具有砖壁幅度响应，即具有非常高的带边缘幅度对频率响应斜率的通带，大约为100dB /倍频程。 通过在单独的交叉滤波器传递函数中包含传输零点来实现的高通带带边缘斜率与进一步适当的交叉滤波器传递函数合成一起导致包括扬声器系统的单独扬声器驱动器彼此独立地起作用 在他们对总体系声学输出的贡献。 显示了扬声器系统允许在声学空间中精确地逼近理想的延迟函数，同时最小化在相邻频带中操作的驱动器之间的声波干扰，并且还减少了整个系统的非线性失真。