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公开(公告)号：US5272663A
公开(公告)日：1993-12-21
申请号：US878842
申请日：1992-05-05
CPC分类号： H03H9/02976 , H03H21/0005
摘要： Method and apparatus for adaptive filtering a first signal to produce a second signal that approximates a desired signal including an acoustic charge transport type programmable transversal filter (PTF) having a number of taps where each tap corresponds to an associated delayed first signal and each tap having means for providing a variable tap weight to modify the filter response. The first signal is coupled to the PTF and the output of the PTF produces the second signal. A summer compares the output of the PTF and the desired signal to produce an error signal. A programmable delay line has time delays programmable to integer multiples of the PTF tap spacing to provide a delayed version of the first signal, and a multiplier multiplies the error signal and the delayed input of the programmable delay line to produce a gradient signal. The gradient signal is filtered with an analog lowpass filter to produce a filtered gradient signal which in turn is converted to a digital signal by a low bandwidth analog to digital converter. A microprocessor implements a filtered gradient algorithm to update the PTF filter tap, load the new tap weight into the PTF, and reconfigure the programmable delay line to produce a filtered gradient for another tap. The comparison of the PTF output with the desired signal continues to develop an error signal and the adaptive process is repeated until the error signal becomes substantially zero which results in the second signal more closely approximating the desired signal.
摘要翻译： 用于对第一信号进行自适应滤波以产生近似所需信号的第二信号的方法和装置，所述第二信号包括具有多个抽头的声电荷传输类型可编程横向滤波器（PTF），其中每个抽头对应于相关联的延迟第一信号，并且每个抽头具有 用于提供可变抽头重量以修改过滤器响应的装置。 第一信号耦合到PTF，PTF的输出产生第二信号。 夏天比较PTF的输出和所需的信号以产生误差信号。 可编程延迟线具有可编程为PTF抽头间隔的整数倍的时间延迟，以提供第一信号的延迟版本，并且乘法器将误差信号和可编程延迟线的延迟输入相乘以产生梯度信号。 用模拟低通滤波器对梯度信号进行滤波，以产生经滤波的梯度信号，滤波后的梯度信号又由低带宽模数转换器转换为数字信号。 微处理器实现滤波的梯度算法来更新PTF滤波器抽头，将新的抽头加权加载到PTF中，并重新配置可编程延迟线，以产生另一个抽头的滤波梯度。 PTF输出与期望信号的比较继续产生误差信号，重复自适应处理，直到误差信号变得基本为零，这导致第二信号更接近于期望信号。
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公开(公告)号：US5420448A
公开(公告)日：1995-05-30
申请号：US443031
申请日：1989-12-01
CPC分类号： H03H9/02976
摘要： A complementary acoustic charge transport circuit element comprises first and second buried channels. Each of the channels is comprised of a piezoelectric semiconductor and each channel has a source through which charge is injected and a drain through which charge is extracted. A transducer propagates an acoustic wave through each channel and the propagated waves transport the charge between the sources and the drains. A source and/or a drain of one channel is connected in parallel with the corresponding souce and/or drain of the other channel. The waves are complementary at the interconnected ones of the sources and/or the drains.
摘要翻译： 互补声电荷传输电路元件包括第一和第二掩埋沟道。 每个通道由压电半导体组成，并且每个通道具有注入电荷的源和通过其提取电荷的漏极。 换能器通过每个通道传播声波，并且传播的波在源和排水沟之间传输电荷。 一个通道的源极和/或漏极与另一个通道的相应的漏极和/或漏极并联连接。 这些波在相互联系的源和/或下水道是互补的。
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公开(公告)号：US5225798A
公开(公告)日：1993-07-06
申请号：US707147
申请日：1991-05-31
申请人： Billy J. Hunsinger , James E. Bales
发明人： Billy J. Hunsinger , James E. Bales
IPC分类号： H03H15/02
CPC分类号： H03H15/02
摘要： A transversal filter comprises an acoustic charge transport device comprising an input contact for introducing a signal into a buried channel through which the signal is transported by a high frequency acoustic wave and a plurality of non-destructive sense electrodes overlying the channel for successively sampling the signal. A memory device is provided for storing a plurality of tap weight signals, with each tap weight signal for being associated with one of the electrodes. A multiplier system is operably connected with each of the electrodes and with the storage device for generating the product of the signal sampled at each electrode and the associated tap weight signal. A summer is operably associated with the multiplier for summing the products and thereby generating an output signal.
摘要翻译： 横向滤波器包括声电荷传输装置，其包括用于将信号引入掩埋通道的输入触点，通过该掩埋通道，信号由高频声波传输，并且多个非破坏性感测电极覆盖在通道上以连续采样信号 。 提供存储器件用于存储多个抽头加权信号，每个抽头加权信号用于与一个电极相关联。 乘法器系统与每个电极和存储装置可操作地连接，用于产生在每个电极处采样的信号和相关的抽头重量信号的乘积。 夏天可操作地与乘法器相关联以对产物求和，从而产生输出信号。
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公开(公告)号：US4485363A
公开(公告)日：1984-11-27
申请号：US334779
申请日：1981-12-28
CPC分类号： G06G7/195
摘要： A signal processor for filtering unwanted narrowband noise from received wideband electrical signals also containing desired wideband noise is described. The signal processor includes means for partitioning the wideband received signal into a plurality of narrowband, noise-containing signals and for producing a plurality of narrowband output signals. The signal processor further includes means for monitoring each of the narrowband output signals and for reducing the voltage of any narrowband output signal when that signal exceeds a predetermined level. In the preferred embodiment, the monitoring means of the signal processor includes a plurality of voltage-regulating networks, wherein each network receives as a network input signal, a single one of said narrowband output signals into a detector and integrator network to produce an output command signal only when the voltage across a channel exceeds a predetermined level. The command voltage is used to reduce the voltage of the output of the narrowband channels accordingly.
摘要翻译： 描述了用于从也包含期望的宽带噪声的接收的宽带电信号中滤除不想要的窄带噪声的信号处理器。 信号处理器包括用于将宽带接收信号划分成多个窄带，含噪声信号并用于产生多个窄带输出信号的装置。 信号处理器还包括用于监测每个窄带输出信号并用于当该信号超过预定电平时减小任何窄带输出信号的电压的装置。 在优选实施例中，信号处理器的监视装置包括多个电压调节网络，其中每个网络作为网络输入信号接收单个所述窄带输出信号到检测器和积分器网络中以产生输出命令 只有当通道上的电压超过预定电平时才发出信号。 指令电压用于相应地减小窄带通道的输出电压。
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5.发明授权
公开(公告)号：US5144262A
公开(公告)日：1992-09-01
申请号：US420109
申请日：1989-10-10
申请人： Billy J. Hunsinger
发明人： Billy J. Hunsinger
CPC分类号： H03B5/326 , H03H9/02976
摘要： A delay device comprises a semi-conductor chip having acoustic charge transport channel disposed therein; a contact operably connected to and disposed at one end of the channel for injecting an electronic signal into the channel; a transducer for generating a single frequency, large amplitude acoustic surface wave through the channel for thereby transporting the electronic signal through the channel; a plurality of electrodes operably associated with the channel and disposed along the propagation path of the surface acoustic wave for non-destructively sensing the electronic signal; switches monolithically disposed on the chip and operably connected to the electrodes for preselecting any one of the electrodes, thereby extracting a delayed replica of the signal from the channel; and an output circuit for processing the extracted signal for generating an output.
摘要翻译： 延迟装置包括：其中设置有声电荷输送通道的半导体芯片; 触点，可操作地连接到并设置在通道的一端，用于将电子信号注入到通道中; 换能器，用于通过通道产生单频，大幅度的声表面波，从而通过通道传送电子信号; 多个电极，其可操作地与所述通道相关联并沿着所述表面声波的传播路径设置，用于非破坏性地感测所述电子信号; 开关单片地设置在芯片上并可操作地连接到电极，用于预选任何一个电极，从而从通道提取信号的延迟复制品; 以及用于处理所提取的信号以产生输出的输出电路。
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公开(公告)号：US5440155A
公开(公告)日：1995-08-08
申请号：US108602
申请日：1987-10-15
IPC分类号： G06G7/195 , H01L27/20 , H03H9/02 , H01L29/768
CPC分类号： H03H9/02976 , G06G7/195
摘要： A convolver includes first and second buried channels, with each of the channels comprised of a piezoelectric semiconductor. The input of one channel is associated with the output of the other channel. An acoustic transducer is positioned adjacent each input for generating an acoustic wave which propagates through the associated channels and thereby transports charge from the input to the output thereof. A non-destructive sensing array overlies the channels and samples the charge transported thereunder. The array includes an assembly for summing the sampled charge and for generating a product. An electrode is operably associated with the summing assembly for integrating the products and generating a convolution signal.
摘要翻译： 卷积器包括第一和第二掩埋通道，每个通道由压电半导体构成。 一个通道的输入与另一个通道的输出相关联。 声换能器被定位在每个输入附近，用于产生传播通过相关通道的声波，从而将电荷从输入传输到其输出端。 非破坏性感测阵列覆盖在通道上并对其下运送的电荷进行采样。 该阵列包括用于对采样的电荷求和并产生产品的组件。 电极与加法组合可操作地相关联，用于积分产物并产生卷积信号。
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公开(公告)号：US4633285A
公开(公告)日：1986-12-30
申请号：US515846
申请日：1983-07-21
IPC分类号： H01L29/772 , H01L21/339 , H01L29/76 , H01L29/762 , H01L41/00 , H01L41/08 , H03H3/08 , H03H9/02 , H03H9/42 , H03H11/26 , H01L29/84
CPC分类号： H03H9/02976
摘要： The disclosure is directed to a method and a device for delaying an electrical signal, the method and device being useable in various signal processing applications. A buried channel is formed by disposing a portion of a layer of piezoelectric semiconductor material between confining layers. A surface acoustic wave is established in the piezoelectric semiconductor material. Majority carriers are depleted from the channel, and an electrical signal is injected into the channel. A delayed version of the electrical signal, which had been carried along by the surface acoustic wave, can then be extracted from the channel.
摘要翻译： 本公开涉及用于延迟电信号的方法和装置，所述方法和装置可在各种信号处理应用中使用。 通过将一部分压电半导体材料设置在限制层之间来形成掩埋沟道。 在压电半导体材料中建立表面声波。 多数载波从信道中耗尽，电信号被注入到信道中。 然后可以从通道中提取已经被表面声波携带的电信号的延迟版本。
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