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1. 发明授权

US3952261A Signal detection circuit 失效
标题翻译：信号检测电路
公开(公告)号：US3952261A
公开(公告)日：1976-04-20
申请号：US569541
申请日：1975-04-18
申请人： Takao Hara , Yukio Murayama
发明人： Takao Hara , Yukio Murayama
IPC分类号： H03L7/095 , H03B3/04
CPC分类号： H03L7/095
摘要： A signal detection circuit for determining synchronism and asynchronism in a phase synchronization circuit having a loop consisting of a first phase detector, a loop filter and a voltage controlled oscillator, has a second phase detector for input signals of the phase synchronization circuit and output signals of the voltage controlled oscillator. The output of the second phase detector is supplied to a low pass filter and a level judgment circuit. The level judgment circuit includes a Schmitt trigger circuit with two threshold levels due to hysteresis effect to reduce misjudgments when the input signals are low signal to noise signals.
摘要翻译：用于确定具有由第一相位检测器，环路滤波器和压控振荡器组成的回路的相位同步电路中的同步和异步的信号检测电路具有第二相位检测器，用于相位同步电路的输入信号和压控振荡器。第二相位检测器的输出被提供给低通滤波器和电平判断电路。电平判断电路包括由于滞后效应而具有两个阈值电平的施密特触发电路，以在输入信号为低信噪比信号时减少误判。

2. 发明授权

US5254951A Circuit for measuring discharging and charging current of a battery providing offset/drift voltage for correcting amplifier output 失效
标题翻译：用于测量放电和充电电流的电路，提供用于校正放大器输出的偏移/漂移电压
公开(公告)号：US5254951A
公开(公告)日：1993-10-19
申请号：US888785
申请日：1992-05-27
申请人： Seiji Goto , Kazuaki Tsunoda , Yukio Murayama
发明人： Seiji Goto , Kazuaki Tsunoda , Yukio Murayama
IPC分类号： G01R15/08 , G01R19/00 , G01R31/36 , G01N27/42 , H02J7/04
CPC分类号： G01R31/3606
摘要： A current measuring circuit for measuring discharging current and charging current of a battery, which is selectively connected to a load and a charger. The current measuring circuit comprises a resistor connected in series with the battery having a sufficiently low resistance value as not to substantially restrain the output current from the battery and a differential amplifier for amplifying a potential difference between both ends of the resistor. By providing a switch for short-circuiting one input terminal and the other input terminal of the differential amplifier, an offset/drift voltage of the differential amplifier can be obtained. This offset/drift voltage is used for correcting the output voltage from the differential amplifier at the time of current measurement and, thereby, the discharging current and charging current of the battery can be measured accurately.

3. 发明授权

US5197091A Portable telephone having a pipe member which supports a microphone 失效
标题翻译：具有支撑麦克风的管构件的便携式电话
公开(公告)号：US5197091A
公开(公告)日：1993-03-23
申请号：US615402
申请日：1990-11-19
申请人： Hisamitsu Takagi , Masashi Tomura , Akihide Nishiyama , Hideharu Suzuki , Yukio Murayama
发明人： Hisamitsu Takagi , Masashi Tomura , Akihide Nishiyama , Hideharu Suzuki , Yukio Murayama
IPC分类号： H01Q1/08 , H01Q1/24 , H04M1/02 , H04M1/03
CPC分类号： H04M1/03 , H04M1/0202 , H04M1/0214 , H04M1/0235
摘要： A compact portable telephone, in which a sufficient distance between the receiving portion and the voice inlet portion can be secured when the telephone is used. A flexible pipe member formed of metallic or dielectric material is slidably or swingably attached to the main body of the telephone or has its base fixedly attached to the main body. The flexible pipe member is provided at its end with a microphone. When the flexible pipe member is formed of metallic material, the flexible pipe member is used as an antenna. When the flexible pipe member is formed of dielectric material, at least one of a pair of cords connected to the microphone is utilized as an antenna.
摘要翻译：一种紧凑型便携式电话机，其中当使用电话时，可以确保接收部分和语音输入部分之间足够的距离。由金属或电介质材料形成的柔性管构件可滑动或可摆动地附接到电话机主体，或者其底座固定地连接在主体上。柔性管构件的末端设置有麦克风。当柔性管构件由金属材料形成时，柔性管构件用作天线。当柔性管构件由电介质材料形成时，连接到麦克风的一对电线中的至少一个被用作天线。

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