公开(公告)号：US07515648B2

公开(公告)日：2009-04-07

申请号：US11017076

申请日：2004-12-21

申请人： Taizo Yamawaki ,  Masahiro Ito ,  Masumi Kasahara ,  Hiroaki Matsui

发明人： Taizo Yamawaki ,  Masahiro Ito ,  Masumi Kasahara ,  Hiroaki Matsui

IPC分类号： H04K1/02

CPC分类号： H04L27/0008 ,  H03F1/02 ,  H03F3/24 ,  H04B2001/045

摘要： A transmitter that can reduce noise without using an SAW filter whose IC integration is hard, and copes with two modulation formats of constant envelope modulation and non-constant envelope modulation, and a downsized and low-cost wireless communication apparatus that uses the transmitter are provided. The transmitter includes a quadrature modulator that modulates an input signal by quadrature modulation, a first amplifier that amplifies a modulation signal outputted by the quadrature modulator, and a second amplifier that amplifies an output signal of the first amplifier. The first amplifier operates as a limiter when the modulation format is the constant envelope modulation, and performs linear operation when the modulation format is the non-constant envelope modulation.

摘要翻译： 提供一种能够在不使用集成硬件的SAW滤波器的情况下降低噪声的发射机，并且应用恒定包络调制和非恒定包络调制的两种调制格式，以及使用发射机的小型化和低成本的无线通信装置 。 发射机包括通过正交调制来调制输入信号的正交调制器，放大由正交调制器输出的调制信号的第一放大器和放大第一放大器的输出信号的第二放大器。 当调制格式为恒定包络调制时，第一放大器用作限幅器，并且当调制格式是非恒定包络调制时，执行线性运算。

公开(公告)号：US20070087716A1

公开(公告)日：2007-04-19

申请号：US11637759

申请日：2006-12-13

申请人： Masumi Kasahara ,  Koichi Yahagi

发明人： Masumi Kasahara ,  Koichi Yahagi

IPC分类号： H04B1/40 ,  H04B7/00

CPC分类号： H03L7/10 ,  H03L7/0891 ,  H03L7/14 ,  H03L7/18 ,  H03L7/199 ,  H04B1/00 ,  H04B1/406

摘要： A wireless communication system, which is provided with a PLL circuit having a plurality of oscillators and is capable of processing two or more transmit and receive signal different in frequency band from one another according to the switching between the oscillators, has a reset means which resets a voltage applied to each of filter capacitors lying within the PLL circuit to a predetermined voltage when the switching between the oscillators is performed.

摘要翻译： 一种无线通信系统，具有多个振荡器的PLL电路，并且能够根据振荡器之间的切换来处理两个或更多个频带彼此不同的发送和接收信号，该复位装置具有复位装置 当执行振荡器之间的切换时，施加到位于PLL电路内的每个滤波电容器的电压达到预定电压。

公开(公告)号：US06783073B2

公开(公告)日：2004-08-31

申请号：US10200162

申请日：2002-07-23

申请人： Kouichi Yahagi ,  Masumi Kasahara ,  Hiroki Nakajima

发明人： Kouichi Yahagi ,  Masumi Kasahara ,  Hiroki Nakajima

IPC分类号： G06F710

CPC分类号： H04N5/378 ,  H04N5/3572 ,  H04N5/3575 ,  H04N5/361 ,  H04N5/3655

摘要： An image input system includes a solid state image pickup device and a preprocessor for performing correlated double sampling amplification on an output of the image pickup device and outputting a video signal. The preprocessor has a correlated double sampling amplifier for outputting signal information corresponding to a difference voltage between the black level in a feedthrough period of the image pickup device and a signal level in a charge signal output period; and an offset cancelling circuit for cancelling an offset voltage corresponding to the difference voltage in a state where the image pickup device is optically interrupted to the input terminal of the correlated double sampling amplifier. The correlated double sampling amplifier cancels out the offset voltage and the offset cancelling voltage as signal components of polarities opposite to each other, so that circuits following the correlated double sampling amplifier are not influenced by the offset voltage.

摘要翻译： 图像输入系统包括固态图像拾取装置和预处理器，用于对图像拾取装置的输出执行相关双重采样放大并输出视频信号。 所述预处理器具有相关联的双采样放大器，用于输出对应于图像拾取装置的馈通周期中的黑电平与充电信号输出周期中的信号电平之间的差电压的信号信息; 以及偏移消除电路，用于在图像拾取器件被光学地中断到相关双采样放大器的输入端的状态下消除对应于差分电压的偏移电压。 相关双采样放大器消除偏移电压和偏移消除电压作为彼此相反极性的信号分量，使得相关双采样放大器之后的电路不受偏移电压的影响。

公开(公告)号：US06499663B1

公开(公告)日：2002-12-31

申请号：US09529651

申请日：2000-04-18

申请人： Kouichi Yahagi ,  Masumi Kasahara ,  Hiroki Nakajima

发明人： Kouichi Yahagi ,  Masumi Kasahara ,  Hiroki Nakajima

IPC分类号： G06F710

CPC分类号： H04N5/3572 ,  H04N5/16 ,  H04N5/18 ,  H04N5/20 ,  H04N5/3575

摘要： An image input system includes a solid state image pickup device and a preprocessor for performing correlated double sampling amplification on an output of the image pickup device and outputting a video signal. The preprocessor has a correlated double sampling amplifier for outputting signal information corresponding to a difference voltage between the black level in a feedthrough period of the image pickup device and a signal level in a charge signal output period; and an offset cancelling circuit for cancelling an offset voltage corresponding to the difference voltage in a state where the image pickup device is optically interrupted to the input terminal of the correlated double sampling amplifier. The correlated double sampling amplifier cancels out the offset voltage and the offset cancelling voltage as signal components of polarities opposite to each other, so that circuits following the correlated double sampling amplifier are not influenced by the offset voltage.

摘要翻译： 图像输入系统包括固态图像拾取装置和预处理器，用于对图像拾取装置的输出执行相关双重采样放大并输出视频信号。 所述预处理器具有相关联的双采样放大器，用于输出对应于图像拾取装置的馈通周期中的黑电平与电荷信号输出周期中的信号电平之间的差电压的信号信息; 以及偏移消除电路，用于在图像拾取器件被光学地中断到相关双采样放大器的输入端的状态下消除对应于差分电压的偏移电压。 相关双采样放大器消除偏移电压和偏移消除电压作为彼此相反极性的信号分量，使得相关双采样放大器之后的电路不受偏移电压的影响。

公开(公告)号：US4804940A

公开(公告)日：1989-02-14

申请号：US843666

申请日：1986-03-25

申请人： Akira Takigawa ,  Shizuo Kondo ,  Masumi Kasahara ,  Toshinori Hirashima ,  Mikio Haijima ,  Setsuo Ogura ,  Osamu Takada ,  Yoshiki Akamatsu

发明人： Akira Takigawa ,  Shizuo Kondo ,  Masumi Kasahara ,  Toshinori Hirashima ,  Mikio Haijima ,  Setsuo Ogura ,  Osamu Takada ,  Yoshiki Akamatsu

IPC分类号： H01C7/00 ,  H01L21/02 ,  H03M1/76 ,  H03M1/36 ,  H03M1/74

CPC分类号： H01L28/20 ,  H01C7/006 ,  H03M1/765

摘要： A resistor is provided with a plurality of turn parts whose corners have an obtuse flexional angle in order to improve the relative resistance precision. A ladder resistor can be formed with a plurality of such resistors connected in series, and various electronic devices are formed employing the ladder resistor.

摘要翻译： 电阻器设置有多个转弯部分，其拐角具有钝的弯曲角度，以便提高相对电阻精度。 梯形电阻器可以形成有串联连接的多个这样的电阻器，并且使用梯形电阻器形成各种电子器件。