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1. 发明申请

US20100151800A1 COMMUNICATION DEVICE AND COMMUNICATION METHOD 审中-公开
标题翻译：通信设备和通信方法
公开(公告)号：US20100151800A1
公开(公告)日：2010-06-17
申请号：US12558784
申请日：2009-09-14
申请人： Ippei Akita , Takafumi Yamaji , Akihide Sai
发明人： Ippei Akita , Takafumi Yamaji , Akihide Sai
IPC分类号： H04B1/40 , H04B1/26
CPC分类号： H04B1/109 , H04W52/0238 , Y02D70/40
摘要： A communication device includes: a first oscillator to generate a local signal based on a control signal for regulating at least one of phase oise and jitter in the local signal; a frequency converter to convert a first signal having first frequency to a second signal having second frequency by using the local signal; a filter to remove undesired signal component from the second signal and output a third signal; and a controller to generate the control signal based on the second signal and the third signal.
摘要翻译：通信设备包括：第一振荡器，用于基于用于调节本地信号中的相位噪声和抖动中的至少一个的控制信号来产生本地信号; 频率转换器，通过使用本地信号将具有第一频率的第一信号转换成具有第二频率的第二信号; 滤波器，用于从所述第二信号中去除不需要的信号分量并输出第三信号; 以及控制器，用于基于第二信号和第三信号产生控制信号。

2. 发明申请

US20060139191A1 D/A converter and communication apparatus 有权
公开(公告)号：US20060139191A1
公开(公告)日：2006-06-29
申请号：US11319106
申请日：2005-12-27
申请人： Akihide Sai , Takeshi Ueno , Takafumi Yamaji
发明人： Akihide Sai , Takeshi Ueno , Takafumi Yamaji
IPC分类号： H03M1/00
CPC分类号： H03M1/747
摘要： A D/A converter includes a plurality of current sources configured to be on or off according to input digital data; a constant voltage source configured to apply a constant voltage to the current sources; current supply wirings provided between the constant voltage source and the respective current source, the current supply wirings respectively having equal length from the constant voltage source to the respective current source; ground-side wirings summing up output currents from the plurality of current sources; and output terminals connected to the ground-side wirings, the output terminals outputting analogue data corresponding to the input digital data.

3. 发明申请

US20090033427A1 OSCILLATOR, PLL OSCILLATOR, RADIO APPARATUS 审中-公开
标题翻译：振荡器，PLL振荡器，无线电设备
公开(公告)号：US20090033427A1
公开(公告)日：2009-02-05
申请号：US12246871
申请日：2008-10-07
申请人： Akihide Sai , Hidenori Okuni , Takafumi Yamaji
发明人： Akihide Sai , Hidenori Okuni , Takafumi Yamaji
IPC分类号： H03L7/00
CPC分类号： H03L7/0995 , H03L7/0891 , H03L7/18
摘要： An oscillator includes a plurality of oscillating units connected in parallel with each other, and a control unit which controls the number of parallel connections of the plurality of oscillating units based on an instruction signal indicating accuracy to be tolerated with respect to oscillation outputs of the oscillating units.
摘要翻译：振荡器包括彼此并联连接的多个振荡单元，以及控制单元，其基于指示信号来控制多个振荡单元的并联数量，所述指令信号指示相对于振荡器的振荡输出允许的精度单位。

4. 发明授权

US07482959B2 D/A converter and communication apparatus 有权
标题翻译： D / A转换器和通信装置
公开(公告)号：US07482959B2
公开(公告)日：2009-01-27
申请号：US11319106
申请日：2005-12-27
申请人： Akihide Sai , Takeshi Ueno , Takafumi Yamaji
发明人： Akihide Sai , Takeshi Ueno , Takafumi Yamaji
IPC分类号： H03M1/66
CPC分类号： H03M1/747
摘要： A D/A converter includes a plurality of current sources configured to be on or off according to input digital data; a constant voltage source configured to apply a constant voltage to the current sources; current supply wirings provided between the constant voltage source and the respective current source, the current supply wirings respectively having equal length from the constant voltage source to the respective current source; ground-side wirings summing up output currents from the plurality of current sources; and output terminals connected to the ground-side wirings, the output terminals outputting analogue data corresponding to the input digital data.
摘要翻译： D / A转换器包括根据输入数字数据配置为开或关的多个电流源; 恒定电压源，被配置为向所述电流源施加恒定电压; 设置在恒压源和相应电流源之间的电流供应布线，电流源布线分别具有从恒定电压源到相应电流源的相等长度; 接地侧布线将来自多个电流源的输出电流相加; 和与地侧布线连接的输出端子，输出端子输出对应于输入数字数据的模拟数据。

5. 发明申请

US20070182493A1 OSCILLATOR, PLL OSCILLATOR, RADIO APPARATUS 失效
标题翻译：振荡器，PLL振荡器，无线电设备
公开(公告)号：US20070182493A1
公开(公告)日：2007-08-09
申请号：US11532630
申请日：2006-09-18
申请人： Akihide Sai , Hidenori Okuni , Takafumi Yamaji
发明人： Akihide Sai , Hidenori Okuni , Takafumi Yamaji
IPC分类号： H03L7/00
CPC分类号： H03L7/0995 , H03L7/0891 , H03L7/18
摘要： An oscillator includes a plurality of oscillating units connected in parallel with each other, and a control unit which controls the number of parallel connections of the plurality of oscillating units based on an instruction signal indicating accuracy to be tolerated with respect to oscillation outputs of the oscillating units.
摘要翻译：振荡器包括彼此并联连接的多个振荡单元，以及控制单元，其基于指示信号来控制多个振荡单元的并联数量，所述指令信号指示相对于振荡器的振荡输出允许的精度单位。

6. 发明授权

US07449961B2 Parallel controlled connections of the plurality of ring oscillator units, PLL, radio apparatus 失效
标题翻译：多个环形振荡器单元，PLL，无线电设备的并行控制连接
公开(公告)号：US07449961B2
公开(公告)日：2008-11-11
申请号：US11532630
申请日：2006-09-18
申请人： Akihide Sai , Hidenori Okuni , Takafumi Yamaji
发明人： Akihide Sai , Hidenori Okuni , Takafumi Yamaji
IPC分类号： H03L7/00
CPC分类号： H03L7/0995 , H03L7/0891 , H03L7/18
摘要： An oscillator includes a plurality of oscillating units connected in parallel with each other, and a control unit which controls the number of parallel connections of the plurality of oscillating units based on an instruction signal indicating accuracy to be tolerated with respect to oscillation outputs of the oscillating units.
摘要翻译：振荡器包括彼此并联连接的多个振荡单元，以及控制单元，其基于指示信号来控制多个振荡单元的并联数量，所述指令信号指示相对于振荡器的振荡输出允许的精度单位。

7. 发明申请

US20070011482A1 Clock generator, radio receiver using the same, function system, and sensing system 审中-公开
标题翻译：时钟发生器，使用相同的无线电接收器，功能系统和传感系统
公开(公告)号：US20070011482A1
公开(公告)日：2007-01-11
申请号：US11438589
申请日：2006-05-22
申请人： Akihide Sai , Takeshi Ueno , Takafumi Yamaji , Tetsuro Itakura
发明人： Akihide Sai , Takeshi Ueno , Takafumi Yamaji , Tetsuro Itakura
IPC分类号： G06F1/00
CPC分类号： H03L7/23 , H03L7/18
摘要： A clock generator having phase locked loops to receive reference signals from a shared reference signal source and generate clock signals differing in frequency, respectively, includes a phase comparator which generates a voltage signal in response to a phase difference between a phase of the reference signal and a phase of a feedback signal, a VCO controlled by a voltage signal from the phase comparator, and a frequency divider group connected in cascade in a feedback loop between an output of the VCO and an input of a feedback signal, and takes out a clock signals from each output of the frequency divider group.
摘要翻译：具有锁相环的时钟发生器分别接收来自共享参考信号源的参考信号并且分别产生频率不同的时钟信号，该相位比较器响应于参考信号的相位和相位差之间的相位差产生电压信号反馈信号的相位，由来自相位比较器的电压信号控制的VCO和在VCO的输出与反馈信号的输入之间的反馈回路中级联连接的分频器组，并且取出时钟来自分频器组的每个输出的信号。

8. 发明申请

US20130076544A1 ANALOGUE TO DIGITAL CONVERTER AND SIGNAL PROCESSING SYSTEM 失效
标题翻译：数字转换器和信号处理系统的模拟
公开(公告)号：US20130076544A1
公开(公告)日：2013-03-28
申请号：US13425317
申请日：2012-03-20
申请人： Naoya Waki , Junya Matsuno , Takafumi Yamaji , Masanori Furuta
发明人： Naoya Waki , Junya Matsuno , Takafumi Yamaji , Masanori Furuta
IPC分类号： H03M1/06
CPC分类号： H03M1/0626 , H03M1/0836 , H03M1/1215
摘要： According to one embodiment, an analogue to digital converter converts an analogue input signal to a digital output signal. The converter includes an analogue to digital converting unit, a multiplexer, a pseudo-alias signal generator, a gain controller, and an alias signal compensator. The analogue to digital converting unit converts the analogue input signal to a plurality of digital signals. The multiplexer sequentially selects one of the digital signals and outputs the selected digital signal as a multiplexer output. The pseudo-alias signal generator generates a plurality of pseudo-alias signals from the digital signals. The pseudo-alias signal simulates an alias signal component in the multiplexer output. The gain controller generates a plurality of gain control signals by using the pseudo-alias signals. The gain control signal controls gain of the digital output signal. The alias signal compensator compensates the alias signal component by using the gain control signals.
摘要翻译：根据一个实施例，模数转换器将模拟输入信号转换成数字输出信号。转换器包括模数转换单元，多路复用器，伪别名信号发生器，增益控制器和别名信号补偿器。模数转换单元将模拟输入信号转换为多个数字信号。多路复用器顺序地选择一个数字信号并输出所选择的数字信号作为多路复用器输出。伪别名信号发生器从数字信号产生多个伪别名信号。伪别名信号模拟复用器输出中的别名信号分量。增益控制器通过使用伪别名信号来产生多个增益控制信号。增益控制信号控制数字输出信号的增益。别名信号补偿器通过使用增益控制信号来补偿别名信号分量。

9. 发明申请

US20120208483A1 RADIO APPARATUS 有权
标题翻译：无线电设备
公开(公告)号：US20120208483A1
公开(公告)日：2012-08-16
申请号：US13422636
申请日：2012-03-16
申请人： Shoji OTAKA , Takafumi Yamaji , Tsutomu Sugawara , Yasuhiko Tanabe , Masahiro Hosoya , Hiroki Sakurai
发明人： Shoji OTAKA , Takafumi Yamaji , Tsutomu Sugawara , Yasuhiko Tanabe , Masahiro Hosoya , Hiroki Sakurai
IPC分类号： H04B1/16
CPC分类号： H04W52/0274 , H03L7/0802 , H03L7/1976 , H03L2207/50 , H04L25/0292 , H04L27/38 , H04L27/3818 , H04W52/0229 , Y02D70/142
摘要： A radio apparatus includes an antenna; an amplifier that amplifies a radio signal, received via the antenna; a first mixer that frequency converts the amplified radio signal to generate a first analog signal; a first A/D converter that converts the first analog signal to generate a first digital signal; a second mixer that frequency converts the amplified signal to generate a second analog signal; a second A/D converter means that converts the second analog signal to generate a second digital signal; a demodulator means that demodulates the first and second digital signals to generate a demodulated signal; a detector that detects a preamble from the first digital signal; and a control means that halts the second mixer and second A/D converter during the wait for the radio signal and that activates the second mixer and second A/D converter when the detector detects the preamble.
摘要翻译：无线电设备包括天线; 放大器，放大经由天线接收的无线电信号; 第一混频器，其对放大的无线电信号进行频率转换以产生第一模拟信号; 第一A / D转换器，其转换第一模拟信号以产生第一数字信号; 第二混频器，其对放大的信号进行频率转换以产生第二模拟信号; 第二A / D转换器，用于转换第二模拟信号以产生第二数字信号; 解调器装置，解调第一和第二数字信号以产生解调信号; 检测器，其从所述第一数字信号检测前导码; 以及控制装置，其在等待无线电信号期间停止第二混频器和第二A / D转换器，并且当检测器检测到前导码时激活第二混频器和第二A / D转换器。

10. 发明授权

US07884749B2 A/D converting apparatus 失效
标题翻译： A / D转换装置
公开(公告)号：US07884749B2
公开(公告)日：2011-02-08
申请号：US12349180
申请日：2009-01-06
申请人： Masanori Furuta , Tomohiko Ito , Takafumi Yamaji , Tetsuro Itakura
发明人： Masanori Furuta , Tomohiko Ito , Takafumi Yamaji , Tetsuro Itakura
IPC分类号： H03M1/38
CPC分类号： H03M1/1215 , H03M1/162 , H03M1/164 , H03M1/468
摘要： An A/D converting apparatus includes a first A/D converter to sample an analog input signal having a D/A converter to generate a comparative signal for successive comparison with the analog input signal, a signal generator generate a differential signal between the analog input signal and the comparative signal, and a comparator to compare the comparative signal with a standard value to generate a first digital signal exhibiting high-order bit; an amplifier to amplify the differential signal to generate a residue signal; and a second A/D converter to sample the residue signal to generate a second digital signal exhibiting low-order bit.
摘要翻译： A / D转换装置包括：第一A / D转换器，对具有D / A转换器的模拟输入信号进行采样以产生用于与模拟输入信号连续比较的比较信号，信号发生器在模拟输入端之间产生差分信号信号和比较信号，以及比较器，用于将比较信号与标准值进行比较，以产生呈现高位的第一数字信号; 放大器，用于放大差分信号以产生残余信号; 以及第二A / D转换器，用于对残留信号进行采样以产生呈现低阶位的第二数字信号。

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