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公开(公告)号：US4644102A
公开(公告)日：1987-02-17
申请号：US717534
申请日：1985-03-29
CPC分类号： G06F3/046 , G06F2203/04107
摘要： A digitizing tablet is disclosed in which two multiplexors are connected to alternate conductive loop elements in each plane of elements. The two multiplexors are connected to a differential amplifier. The signals from the differential amplifier are demodulated. The demodulated signal is provided to an integrator. A microprocessor controlled reset switch is connected across the integrator to reset the integrator after the completion of each measurement. Grounded copper strips are used in the space formed within and between the conductive loop elements of the digitizing tablet to shield the loop elements from capacitive interference.
摘要翻译： 公开了一种数字化平板，其中两个多路复用器连接到每个元件平面中的交替导电环形元件。 两个多路复用器连接到差分放大器。 来自差分放大器的信号被解调。 解调信号被提供给积分器。 在整个测量完成后，积分器将微处理器控制的复位开关连接到复位积分器。 在形成在数字化图形输入板的导电回路元件内部和之间的空间中使用接地铜带以屏蔽环路元件免受电容干扰。
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公开(公告)号：US4638119A
公开(公告)日：1987-01-20
申请号：US672310
申请日：1984-11-16
CPC分类号： G06F3/03545
摘要： A position indicating implement is disclosed having a first coil connected to a current source and a second coil inductively coupled with the first coil. A capacitor is connected in series with the second coil so that the current in the first coil induces a phase shifted current in the second coil. A tip extends from the barrel of the position indicating implement of the present invention. The tip is designed for placement on and movement over a digitizing tablet. A switch has been located near the tip so that it is easily accessible to a user's finger while holding the implement.The power source providing an alternating current to the first coil includes a digital switching circuit for producing a step function which approximates a sine wave and lacks any components at the second, third, fourth, fifth and sixth harmonics. The step function is filtered to produce a sine wave for delivery to the first coil. The switch near the tip of the implement may be used as a mouse switch so that the position indicating implement may be used as a mouse to indicate relative position rather than absolute position. Remote signaling may be accomplished by providing a switch in the circuit of the second coil. Calibration of the phase shift between the fields of the two coils may be accomplished by providing a line from the circuit of the second coil.
摘要翻译： 公开了一种位置指示器，其具有连接到电流源的第一线圈和与第一线圈感应耦合的第二线圈。 电容器与第二线圈串联连接，使得第一线圈中的电流在第二线圈中产生相移电流。 尖端从本发明的位置指示器具的筒体延伸出来。 该提示旨在放置在数字化平板电脑上并在其上移动。 开关已经位于尖端附近，使得在握住工具的同时使用者的手指易于接近。 向第一线圈提供交流电的电源包括用于产生近似正弦波并且在第二，第三，第四，第五和第六谐波处缺少任何分量的阶梯函数的数字切换电路。 滤波阶梯函数以产生正弦波以传送到第一线圈。 靠近工具尖端的开关可以用作鼠标开关，使得位置指示器具可以用作鼠标来指示相对位置而不是绝对位置。 远程信号可以通过在第二线圈的电路中提供开关来实现。 可以通过从第二线圈的电路提供线路来实现两个线圈的场之间的相移的校准。
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公开(公告)号：US4963703A
公开(公告)日：1990-10-16
申请号：US381765
申请日：1989-07-18
CPC分类号： G06F3/046
摘要： A digitizing tablet is disclosed in which two sets of circuitous conductive lines form grids each connected at one end to a surrounding conductive loop. All outputs are measured from the conductive loop as a multiplexor sequentially grounds the grids one at a time. The outputs are fed through linear spatial filters which are used to produce intermediate signals which are in turn combined to arrive at raw position signals for a position indicating coil located over the work surface. Separate sets of linear spatial filters may be used to produce two raw position signals differently responsive to tilt which can then be combined to arrive at a true position signal insensitive to tilt.
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公开(公告)号：US20110093104A1
公开(公告)日：2011-04-21
申请号：US12978763
申请日：2010-12-27
申请人： Barry A. Blesser
发明人： Barry A. Blesser
CPC分类号： H04R5/04 , G10H2210/281 , H04S1/002
摘要： An apparatus and method simulates more accurately the natural statistics of a physical reverberation process. A new filter design is provided having a comb shaped group delay. Gain minimums at a plurality of frequencies are combined with a delay line to create a constant reverberation time independent of frequency while allowing for temporal spreading. In addition, the connection topology between the plurality of energy transmission networks is temporally randomized to facilitate energy distribution within the reverberation apparatus. Both the temporal and spectral responses are actively changed on each iteration of the energy recirculation. By making the response have a high echo density and a lack of spectral coloration in the decay, the illusion of a natural process is enhanced.
摘要翻译： 一种装置和方法可以更准确地模拟物理混响过程的自然统计。 提供了具有梳状组延迟的新型滤波器设计。 在多个频率处的增益最小值与延迟线组合以产生与频率无关的恒定混响时间，同时允许时间扩展。 此外，多个能量传输网络之间的连接拓扑被时间上随机化，以便于混响装置内的能量分配。 在能量再循环的每次迭代时，时间和光谱响应都被主动地改变。 通过使响应具有高的回波密度和衰减中的光谱着色不足，增强了自然过程的幻觉。
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公开(公告)号：US07860591B2
公开(公告)日：2010-12-28
申请号：US11331402
申请日：2006-01-12
申请人： Barry A. Blesser
发明人： Barry A. Blesser
IPC分类号： G06F17/00
CPC分类号： H04R5/04 , G10H2210/281 , H04S1/002
摘要： An apparatus and method simulates more accurately the natural statistics of a physical reverberation process. A new filter design is provided having a comb shaped group delay. Gain minimums at a plurality of frequencies are combined with a delay line to create a constant reverberation time independent of frequency while allowing for temporal spreading. In addition, the connection topology between the plurality of energy transmission networks is temporally randomized to facilitate energy distribution within the reverberation apparatus. Both the temporal and spectral responses are actively changed on each iteration of the energy recirculation. By making the response have a high echo density and a lack of spectral coloration in the decay, the illusion of a natural process is enhanced.
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公开(公告)号：US4694471A
公开(公告)日：1987-09-15
申请号：US859318
申请日：1986-05-05
申请人： Barry A. Blesser
发明人： Barry A. Blesser
摘要： A digital data communications system transmits digital data over a telephone line using frequency multiplexing for the different channels. Each channel includes a receiver and a transmitter coupled to the telephone line at spaced points. Each transmitter includes an FSK modulator, a bandpass filter of controllable bandwidth centered about 5 kHz with its bandwidth controlled by a bandwidth select signal related to the bandwidth needed to transmit data over that channel. A mixer combines the output of the bandpass filter with a local oscillator signal of frequency related to the selected channel to provide a difference frequency signal that is applied to a lowpass filter having a cutoff at 3 kHz that is coupled to the telephone line. Each receiver includes a lowpass filter having a cutoff at 3 kHz that couples the line to a mixer. The mixer combines the input signal with a local oscillator signal of frequency related to that of an associated transmitter to provide a receiver intermediate frequency signal at 5 kHz that is applied to a bandpass filter of controllable bandwidth that receives a bandwidth select signal. The bandwidth select signal controlls the bandwidth in accordance with the frequency of the receiver local oscillator so as to be the same as the bandwidth selected at the transmitter for that particular frequency channel. The output of the bandpass filter is coupled to an FSK demodulator that provides the digital data on its output corresponding to that applied at the input of the associated transmitter.
摘要翻译： 数字数据通信系统通过电话线通过不同频道的频率复用来发送数字数据。 每个通道包括一个接收器和一个在间隔的点处耦合到电话线的发射器。 每个发射机包括FSK调制器，以5kHz为中心的可控带宽的带通滤波器，其带宽由与通过该信道发送数据所需的带宽相关的带宽选择信号控制。 混频器将带通滤波器的输出与与所选频道相关的频率的本地振荡器信号组合，以提供施加到耦合到电话线的具有3kHz截止频率的低通滤波器的差频信号。 每个接收器包括具有3kHz截止频率的低通滤波器，将该线路耦合到混频器。 混频器将输入信号与与相关发射机相关的频率的本地振荡器信号组合，以提供5kHz的接收机中频信号，其被施加到接收带宽选择信号的可控带宽的带通滤波器。 带宽选择信号根据接收机本地振荡器的频率控制带宽，以便与在该特定频率信道的发射机处选择的带宽相同。 带通滤波器的输出耦合到FSK解调器，该FSK解调器在其输出端提供对应于在相关发射机的输入端施加的数字数据的数字数据。
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公开(公告)号：US07860590B2
公开(公告)日：2010-12-28
申请号：US11331370
申请日：2006-01-12
申请人： Barry A. Blesser
发明人： Barry A. Blesser
CPC分类号： H04R5/04 , G10H2210/281 , H04S1/002
摘要： An apparatus and method simulates more accurately the natural statistics of a physical reverberation process. A new filter design is provided having a comb shaped group delay. Gain minimums at a plurality of frequencies are combined with a delay line to create a constant reverberation time independent of frequency while allowing for temporal spreading. In addition, the connection topology between the plurality of energy transmission networks is temporally randomized to facilitate energy distribution within the reverberation apparatus. Both the temporal and spectral responses are actively changed on each iteration of the energy recirculation. By making the response have a high echo density and a lack of spectral coloration in the decay, the illusion of a natural process is enhanced.
摘要翻译： 一种装置和方法可以更准确地模拟物理混响过程的自然统计。 提供了具有梳状组延迟的新型滤波器设计。 在多个频率处的增益最小值与延迟线组合以产生与频率无关的恒定混响时间，同时允许时间扩展。 此外，多个能量传输网络之间的连接拓扑被时间上随机化，以便于混响装置内的能量分配。 在能量再循环的每次迭代时，时间和光谱响应都被主动地改变。 通过使响应具有高的回波密度和衰减中的光谱着色不足，增强了自然过程的幻觉。
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公开(公告)号：US07062337B1
公开(公告)日：2006-06-13
申请号：US09922816
申请日：2001-08-06
申请人： Barry A. Blesser
发明人： Barry A. Blesser
CPC分类号： H04R5/04 , G10H2210/281 , H04S1/002
摘要： An apparatus and method simulates more accurately the natural statistics of a physical reverberation process. A new filter design is provided having a comb shaped group delay. Gain minimums at a plurality of frequencies are combined with a delay line to create a constant reverberation time independent of frequency while allowing for temporal spreading. In addition, the connection topology between the plurality of energy transmission networks is temporally randomized to facilitate energy distribution within the reverberation apparatus. Both the temporal and spectral responses are actively changed on each iteration of the energy recirculation. By making the response have a high echo density and a lack of spectral coloration in the decay, the illusion of a natural process is enhanced.
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公开(公告)号：US4181820A
公开(公告)日：1980-01-01
申请号：US898889
申请日：1978-04-21
申请人： Barry A. Blesser , Karl-Otto Bader
发明人： Barry A. Blesser , Karl-Otto Bader
CPC分类号： G10K15/12
摘要： An electronic reverberation apparatus, for producing artificial reverberation on a purely electronic basis with a digital computer, comprises a plurality of loops having different delay times and adapted to form sound repetitions of diminishing intensity. Some of the loops have short delay times and have an all-pass characteristic. Others of the loops have long delay times. The loops are provided with tappings each of which has a particular delay time associated with it. The delay times of the tappings themselves and the sums, differences and quotients of these delay times are in a non-harmonic relationship to one another. Each tapping feeds a corresponding damping element whereby the output from each successive tapping is reduced such that the reduction in energy corresponds to an exponential function, and a delayed and repeated combination of unreverberated input signals is fed to an output from the loop circuit. For naturalness the output of each reverberation delay unit is randomly damped.
摘要翻译： 一种用于利用数字计算机在纯电子的基础上产生人造混响的电子混响装置包括具有不同延迟时间的多个回路，并适于形成强度下降的声音重复。 一些环路具有短延迟时间并具有全通特性。 其他的循环有很长的延迟时间。 这些环路提供有每个具有与其相关联的特定延迟时间的触发。 触发本身的延迟时间以及这些延迟时间的和，差和商数彼此之间是非谐波关系。 每个抽头馈送相应的阻尼元件，由此减小每个连续抽头的输出，使得能量的减少对应于指数函数，并且将来自回路电路的输出的未经滤波的输入信号的延迟和重复的组合馈送到输出。 为了自然而然，每个混响延迟单元的输出是随机衰减的。
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