公开(公告)号：US4890076A

公开(公告)日：1989-12-26

申请号：US183983

申请日：1988-04-20

申请人： Kazutada Higashi ,  Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

发明人： Kazutada Higashi ,  Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

IPC分类号： G01S13/82 ,  H03C1/60 ,  H03C7/02

CPC分类号： H03C1/60 ,  H03C7/027 ,  H03C2200/0033 ,  H03C2200/007

摘要： The SSB modulator according to the present invention is comprised of a driving voltage generator, a diode, a bias supply circuit, an impedance transformation circuit and an input/output terminal. The SSB modulator is arranged such that the impedance of the diode is changed by changing the driving voltage impressed across the diode, resulting in the mismatching of the impedance, which leads to generation of a reflected wave. Therefore, by changing the amplitude and the phase of the above-obtained reflected wave, SSB modulation is effected. Accordingly, the SSB modulator of the present invention, requiring no particular side band filter, is compact in size, light in weight and low in manufacturing cost, with a simple structure of the circuit.

公开(公告)号：US6035213A

公开(公告)日：2000-03-07

申请号：US868993

申请日：1997-06-04

申请人： Masamori Tokuda ,  Masao Miyazaki ,  Takeshi Okamoto

发明人： Masamori Tokuda ,  Masao Miyazaki ,  Takeshi Okamoto

IPC分类号： H04J13/00 ,  H04B1/10 ,  H04Q7/32 ,  H04B1/38

CPC分类号： H04B1/71 ,  H04B1/1036 ,  H04B1/7101 ,  H04B1/7102 ,  H04B2001/1063

摘要： A dual-mode cellular telephone system which is capable of suppressing a narrow-band disturbing signal appearing in a mobile station of a dual-mode cellular telephone system adapted for both an analog system and a digital CDMA system. A CDMA signal from a CDMA base station, and a narrow-band signal from an analog system are received through an antenna by a receiver, whereby they are amplified, subjected to frequency conversion, and input to a variable notch filter. A disturbing signal detection circuit supplies the variable notch filter with a control signal for varying its frequency. Namely, the disturbing signal detection circuit detects a case that an output level of the variable notch filter is at a minimum by changing the notch frequency via a series of sweeping control signals. A control signal at which the output level of the variable notch filter is at a minimum is then fed to the variable notch filter, thereby effectively suppressing any intermodulation distortions present in the mobile station.

摘要翻译： 一种双模式蜂窝电话系统，其能够抑制适用于模拟系统和数字CDMA系统的双模蜂窝电话系统的移动台中出现的窄带干扰信号。 来自CDMA基站的CDMA信号和来自模拟系统的窄带信号由接收机通过天线接收，由此被放大，进行频率转换并输入到可变陷波滤波器。 干扰信号检测电路为可变陷波滤波器提供用于改变其频率的控制信号。 也就是说，干扰信号检测电路通过一系列扫频控制信号来改变陷波频率来检测可变陷波滤波器的输出电平最小的情况。 可变陷波滤波器的输出电平处于最小的控制信号然后被馈送到可变陷波滤波器，从而有效地抑制移动台中存在的任何互调失真。

公开(公告)号：US5642103A

公开(公告)日：1997-06-24

申请号：US267291

申请日：1994-06-14

申请人： Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

发明人： Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

IPC分类号： G01S13/74 ,  G01S7/02 ,  G01S13/75 ,  G06K17/00 ,  G06K19/07 ,  G06K19/077 ,  G07B15/06 ,  G07C9/00 ,  H04B1/59 ,  H04B7/26 ,  H04W4/04 ,  H04Q7/00

CPC分类号： G07B15/063 ,  G01S13/756 ,  G01S7/024 ,  G06K19/0723 ,  G06K19/07703 ,  G07C9/00111

摘要： A transponder used in a remote identification system requiring an interrogator and a transponder. The transponder which is thin and compact includes a transmit/receive antenna which is thin for receiving an interrogating signal and a rewrite signal emitted from the interrogator, and for emitting a response signal towards the interrogator. There is a modulator/demodulator for modulating a signal according to a code inherent in the transponder to emit the same from the antenna as the response signal without newly applying energy to the interrogating signal, and for demodulating the rewrite signal. A controller for applying a modulating signal generated according to the inherent code to the modulator/demodulator and for storing a signal demodulated by the modulator/demodulator. A liquid crystal display is used for displaying data including bar codes which can be read by a bar code reader. The bar code can be rewritten.

摘要翻译： 用于需要询问器和应答器的远程识别系统中的应答器。 薄而紧凑的应答器包括发送/接收天线，该发射/接收天线很薄以用于接收询问信号和从询问器发射的重写信号，并且向询问器发射响应信号。 存在用于根据应答器固有的代码来调制信号的调制器/解调器，从天线发射相同的响应信号，而不向接收信号新施加能量，并且解调重写信号。 一种用于将根据固有码产生的调制信号施加到调制器/解调器并用于存储由调制器/解调器解调的信号的控制器。 液晶显示器用于显示可由条形码读取器读取的包括条形码的数据。 条形码可以重写。

公开(公告)号：US5313211A

公开(公告)日：1994-05-17

申请号：US741608

申请日：1991-08-07

申请人： Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

发明人： Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

IPC分类号： H04B1/40 ,  G01S7/02 ,  G01S13/75 ,  G01S13/82 ,  G06F15/02 ,  G06K7/00 ,  G01S13/80

CPC分类号： G01S13/756 ,  G01S13/825 ,  G01S7/024 ,  G06F15/0225 ,  G06K7/0008

摘要： A detachable IC card applicable to a portable data processing device referred to as an "electronic organizer" is disclosed. The IC card is formed of microstrip lines formed on a dielectric substrate. An antenna receives an externally applied unmodulated carrier signal and guides the received signal to microstrip lines for impedance conversion. Cathode potential of a diode is varied in response to a data signal outputted from a CPU, so that the barrier capacitance of the diode varies. Accordingly, the carrier is reflected according to the data signal and radiated toward the electronic organizer main body through the antenna. An oscillator for data transmission is not required in the IC card, so that an internal battery having a large capacitance is not required, either. As a result, without increasing the size and weight of the device, radio transmission of data from the IC card can be accomplished.

摘要翻译： 公开了适用于称为“电子管理器”的便携式数据处理装置的可拆卸IC卡。 IC卡由形成在电介质基板上的微带线形成。 天线接收外部施加的未调制载波信号，并将接收到的信号引导到微带线以进行阻抗转换。 二极管的阴极电位响应于从CPU输出的数据信号而变化，使得二极管的势垒电容变化。 因此，载体根据数据信号反射并通过天线朝向电子组织器主体辐射。 IC卡不需要用于数据传输的振荡器，因此也不需要具有大电容的内部电池。 结果，在不增加设备的尺寸和重量的情况下，可以实现来自IC卡的数据的无线电传输。