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公开(公告)号：US06198197B1
公开(公告)日：2001-03-06
申请号：US09499467
申请日：2000-02-07
IPC分类号： H03H925
CPC分类号： H03H9/64 , H03F13/00 , H03F2200/372 , H03H9/02566 , H03H9/02574
摘要： A surface acoustic wave functional element is provided that includes a piezoelectric substrate or a multilayer piezoelectric substrate having a large electromechanical coupling coefficient. Semiconductor layers are formed on the piezoelectric substrate. The semiconductor layers include an active layer and a buffer layer. The buffer layer is formed of a structure that has a lattice constant that is the same as or similar to that of the active layer. In addition, input and output electrodes are formed on both sides of the semiconductor layers. The surface acoustic wave functional element attains a large amplification gain at low voltage, and can be used as part of a transmitting/receiving circuit in a high frequency portion of a mobile communication device.
摘要翻译： 提供了一种表面声波功能元件，其包括具有大机电耦合系数的压电基片或多层压电基片。 半导体层形成在压电基板上。 半导体层包括有源层和缓冲层。 缓冲层由具有与有源层相同或类似的晶格常数的结构形成。 另外，在半导体层的两侧形成有输入输出电极。 表面声波功能元件在低电压下获得大的放大增益，并且可以用作移动通信设备的高频部分中的发送/接收电路的一部分。
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2.发明授权Elastic surface wave functional device and electronic circuit using the element 失效弹性表面波功能器件和电子电路使用元件
公开(公告)号：US6046524A
公开(公告)日：2000-04-04
申请号：US894321
申请日：1998-07-22
IPC分类号： H01L41/08 , H01L21/203 , H01L41/083 , H03F13/00 , H03H3/08 , H03H9/02 , H03H9/25 , H03H9/64 , H03H9/72
CPC分类号： H03H9/64 , H03F13/00 , H03H9/02566 , H03H9/02574 , H03F2200/372
摘要： A surface acoustic wave functional element is provided that includes a piezoelectric substrate or a multilayer piezoelectric substrate having a large electromechanical coupling coefficient. Semiconductor layers are formed on the piezoelectric substrate. The semiconductor layers include an active layer and a buffer layer. The buffer layer is formed of a structure that has a lattice constant that is the same as or similar to that of the active layer. In addition, input and output electrodes are formed on both sides of the semiconductor layers. The surface acoustic wave functional clement attains a large amplification gain at low voltage, and can be used as part of a transmitting/receiving circuit in a high frequency portion of a mobile communication device.
摘要翻译： PCT No.PCT / JP96 / 00339 Sec。 371日期：1998年7月22日 102（e）日期1998年7月22日PCT提交1996年2月16日PCT公布。 公开号WO96 / 25792 日期：1996年8月22日提供了具有压电基板或具有大机电耦合系数的多层压电基板的声表面波功能元件。 半导体层形成在压电基板上。 半导体层包括有源层和缓冲层。 缓冲层由具有与有源层相同或类似的晶格常数的结构形成。 另外，在半导体层的两侧形成有输入输出电极。 表面声波功能元件在低电压下获得大的放大增益，并且可以用作移动通信设备的高频部分中的发送/接收电路的一部分。
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3.发明授权公开(公告)号：US07054355B2
公开(公告)日：2006-05-30
申请号：US09826626
申请日：2001-04-05
IPC分类号： H04B1/707
CPC分类号： H04B1/7077 , H04B1/70712 , H04B1/7093 , H04B2201/70707
摘要： In a spread spectrum communication using a long spreading code, a spread spectrum signal processing apparatus is provided, which is suitable for performing communication by using a correlator having a size mountable on a portable equipment. The spread spectrum signal processing apparatus has a correlator for correlating between a spread spectrum signal and a given reference signal, an A/D converter for converting a correlation signal into a digital signal, a memory for storing the digital signal from the AD converter as digital data, a signal processor for summing digital data corresponding to each of divided codes C1–C16 and for outputting a result of summation, and a control unit for controlling to apply each of the divided codes C1–C16 in this order repeatedly as a reference signal to the correlator. The signal processor begins a summing process by making reference to a timing signal from the control unit.
摘要翻译： 在使用长扩展码的扩展频谱通信中，提供了一种扩展频谱信号处理装置，其适于通过使用具有可安装在便携式设备上的尺寸的相关器进行通信。 扩频信号处理装置具有用于将扩频信号和给定参考信号相关的相关器，将相关信号转换为数字信号的A / D转换器，将来自AD转换器的数字信号存储为数字信号的存储器 数据，用于对应于每个划分代码C 1 -C 16的数字数据的信号处理器，并用于输出求和的结果;以及控制单元，用于控制应用 每个分割代码C 1 -C 16以此顺序重复作为到相关器的参考信号。 信号处理器通过参考来自控制单元的定时信号来开始求和处理。
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