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11. 发明授权

US08618892B2 Communication device and communication system 有权
标题翻译：通信设备和通信系统
公开(公告)号：US08618892B2
公开(公告)日：2013-12-31
申请号：US13085858
申请日：2011-04-13
申请人： Sachio Iida
发明人： Sachio Iida
IPC分类号： H01P5/00 , H01P1/00
CPC分类号： H01P5/085 , H01P1/213 , H01P5/08
摘要： There is provided a communication system including a transmitter and a receiver, each including a communication circuit unit that processes a high-frequency signal for transmitting data, a band-pass filter, and a high frequency coupler, a distributed constant line connecting the high frequency coupler and the band-pass filter of the transmitter, and a distributed constant line connecting the high frequency coupler and the band-pass filter of the receiver, wherein an electrical length of the distributed constant line of the transmitter is different from an electrical length of the distributed constant line of the receiver.
摘要翻译：提供了一种包括发射机和接收机的通信系统，每个通信系统包括处理用于发送数据的高频信号的通信电路单元，带通滤波器和高频耦合器，连接高频耦合器和发送器的带通滤波器，以及连接接收器的高频耦合器和带通滤波器的分布常数线路，其中发射机的分布常数线路的电长度不同于接收机的分布常数线路。

12. 发明申请

US20130049881A1 FILTER CIRCUIT AND RADIO TERMINAL INCLUDING FILTER CIRCUIT 失效
标题翻译：滤波电路和无线电终端，包括滤波电路
公开(公告)号：US20130049881A1
公开(公告)日：2013-02-28
申请号：US13553951
申请日：2012-07-20
申请人： Sachio Iida
发明人： Sachio Iida
IPC分类号： H01P1/20 , H01P1/10
CPC分类号： H03H19/004 , H03H19/008
摘要： There is provided a filter circuit including a passive mixer circuit, and a passive switched capacitor circuit that is connected to a rear stage of the passive mixer and includes a flying capacitor. The passive mixer circuit generates a baseband signal by multiplying an input signal supplied from a predetermined signal source impedance by each local oscillation signal and outputs the baseband signal to the passive switched capacitor circuit, the passive switched capacitor circuit performs predetermined filtering on the baseband signal supplied from the passive mixer circuit and outputs the processed baseband signal, and a capacitance of the flying capacitor of the passive switched capacitor circuit is a capacitance by which input impedance of the passive mixer circuit is matched to the signal source impedance.
摘要翻译：提供了一种包括无源混频器电路和无源开关电容器电路的滤波电路，其被连接到无源混频器的后级并且包括飞行电容器。无源混频器电路通过将从预定信号源阻抗提供的输入信号乘以每个本地振荡信号产生基带信号，并将基带信号输出到无源开关电容器电路，无源开关电容器电路对提供的基带信号执行预定滤波从无源混频器电路输出处理后的基带信号，无源开关电容电路的飞电容器的电容是无源混频器电路的输入阻抗与信号源阻抗匹配的电容。

13. 发明授权

US08067972B2 Filter circuit and communication device 失效
标题翻译：滤波电路及通讯装置
公开(公告)号：US08067972B2
公开(公告)日：2011-11-29
申请号：US12773648
申请日：2010-05-04
申请人： Sachio Iida , Atsushi Yoshizawa
发明人： Sachio Iida , Atsushi Yoshizawa
IPC分类号： H03K5/00
CPC分类号： H03H15/00 , H03H19/004
摘要： A filter circuit includes a voltage-current conversion portion that converts a voltage signal input to an input terminal to a current signal, a first capacitor unit formed by a plurality of capacitors, and in which a current signal output from the voltage-current conversion portion is sequentially input to the capacitors, the unit adding and outputting electric charges of a group of capacitors to which the current signal is input, a second capacitor unit formed by a plurality of capacitors, and in which a current signal output from the first capacitor unit is sequentially input to the capacitors, the unit adding and outputting electric charges of a group of capacitors to which the current signal is input, and a plurality of connection nodes that respectively connect a given capacitor in the first capacitor unit and a capacitor in the second capacitor unit.
摘要翻译：滤波器电路包括将输入到输入端子的电压信号转换为电流信号的电压电流转换部分，由多个电容器形成的第一电容器单元，其中从电压 - 电流转换部分输出的电流信号顺序地输入到电容器中，单元加和输出电流信号输入的一组电容器的电荷，由多个电容器形成的第二电容器单元，其中从第一电容器单元输出的电流信号顺序地输入到电容器，输入电流信号的电容器组的电荷的单位加和输出，以及分别连接第一电容器单元中的给定电容器和第二电容器单元中的电容器的多个连接节点电容器单元。

14. 发明授权

US07990210B2 Amplifier, amplifying method, and filter 有权
标题翻译：放大器，放大方法和滤波器
公开(公告)号：US07990210B2
公开(公告)日：2011-08-02
申请号：US12093207
申请日：2007-09-04
申请人： Sachio Iida , Atsushi Yoshizawa
发明人： Sachio Iida , Atsushi Yoshizawa
IPC分类号： H03F7/00
CPC分类号： H03F3/005 , H03F3/70 , H03F7/04 , H03F2200/507 , H03F2200/513 , H03F2200/519 , H03F2200/522 , H03F2200/525 , H03H19/004
摘要： An amplifier is provided which includes: a first variable capacitance device of which capacitance is variable, a second variable capacitance device of which capacitance is variable, electrically connected to the first variable capacitance device, and of an inverse conductivity type from the first variable capacitance device, and a first input unit for selectively inputting a bias voltage and a voltage signal to the first variable capacitance device and the second variable capacitance device, wherein, in the event that the bias voltage and the voltage signal are input to the first variable capacitance device and the second variable capacitance device, the capacitance of the first variable capacitance device and the second variable capacitance device is taken as a first value, and wherein the voltage signal is amplified with the capacitance of the first variable capacitance device and the second variable capacitance device as a second value smaller than the first value.
摘要翻译：提供一种放大器，其包括：电容变化的第一可变电容器件，电容可变的第二可变电容器件，电连接到第一可变电容器件，以及来自第一可变电容器件的反向导电型以及第一输入单元，用于选择性地将偏置电压和电压信号输入到第一可变电容器件和第二可变电容器件，其中，在偏置电压和电压信号被输入到第一可变电容器件的情况下和第二可变静电电容元件，将第一可变静电电容元件和第二可变静电电容元件的电容作为第一值，其中电压信号用第一可变静电电容元件和第二可变电容元件的电容放大作为小于第一值的第二值。

15. 发明授权

US07751487B2 Wireless communication device 失效
标题翻译：无线通信设备
公开(公告)号：US07751487B2
公开(公告)日：2010-07-06
申请号：US10580823
申请日：2005-10-17
申请人： Sachio Iida
发明人： Sachio Iida
IPC分类号： H04K1/10
CPC分类号： H04B1/71637 , H04B1/719 , H04B2001/71365 , H04L27/2647
摘要： A multiband OFDM_UWB transmitting and receiving apparatus is provided in Low-IF configuration to solve problems attributed to a direct-conversion transmitting and receiving apparatus. A Low-IF receiver performs sorting by rotating a sub-carrier after FFT to eliminate the need for frequency conversion using a second local signal and uses the same AD conversion clock as that for a direct conversion receiver. An FFT-free preamble can be detected by using a sequence resulting from previously multiplying an original preamble pattern and an IF frequency together.
摘要翻译：以低IF配置提供多频带OFDM_UWB发送和接收设备来解决归因于直接转换发送和接收设备的问题。低IF接收机通过在FFT之后旋转子载波来执行排序，以消除使用第二本地信号进行频率转换的需要，并使用与直接转换接收机相同的AD转换时钟。可以通过使用从先前将原始前同步码模式和IF频率相乘得到的序列来检测无FFT的前导码。

16. 发明申请

US20090232246A1 WIRELESS COMMUNICATION DEVICE 失效
标题翻译：无线通信设备
公开(公告)号：US20090232246A1
公开(公告)日：2009-09-17
申请号：US12409059
申请日：2009-03-23
申请人： Sachio Iida
发明人： Sachio Iida
IPC分类号： H04L27/12 , H04B7/02
CPC分类号： H04B1/71637 , H04B1/719 , H04B2001/71365 , H04L27/2647
摘要： A multiband OFDM_UWB transmitting and receiving apparatus is provided in Low-IF configuration to solve problems attributed to a direct-conversion transmitting and receiving apparatus. A Low-IF receiver performs sorting by rotating a sub-carrier after FFT to eliminate the need for frequency conversion using a second local signal and uses the same AD conversion clock as that for a direct conversion receiver. An FFT-free preamble can be detected by using a sequence resulting from previously multiplying an original preamble pattern and an IF frequency together.
摘要翻译：以低IF配置提供多频带OFDM_UWB发送和接收设备来解决归因于直接转换发送和接收设备的问题。低IF接收机通过在FFT之后旋转子载波来执行排序，以消除使用第二本地信号进行频率转换的需要，并使用与直接转换接收机相同的AD转换时钟。可以通过使用从先前将原始前同步码模式和IF频率相乘得到的序列来检测无FFT的前导码。

17. 发明申请

US20080123614A1 Wireless Communication Apparatus 审中-公开
标题翻译：无线通信设备
公开(公告)号：US20080123614A1
公开(公告)日：2008-05-29
申请号：US10591958
申请日：2005-12-28
申请人： Sachio Iida
发明人： Sachio Iida
IPC分类号： H04B7/208
CPC分类号： H04B1/71637 , H04B1/7136 , H04B2001/71362 , H04L25/061 , H04L27/2647
摘要： The present invention eliminates a DC offset problem due to self-mixing in performing frequency conversion on a multiband OFDM_UWB signal by a direct conversion scheme.Capacitors #1, #2, and #3 are provided for each of the hopping bands #1, #2, and#3. Capacitors are switched in synchronization with frequency hopping. For example, capacitor #1 stores electric charge just before frequency hopping from band #1 to another band #2, and continues a step response after hopping to band #1 again. Soon, the charging/discharging of capacitor #1 ceases and reaches a steady state.
摘要翻译：本发明通过直接转换方案消除了在多频带OFDM_UWB信号上执行频率转换时的自混合的DC偏移问题。为每个跳频带＃1，＃2和＃3提供电容器＃1，＃2和＃3。电容器与跳频同步切换。例如，电容器＃1在从频带＃1到另一频带＃2之前的跳频之前存储电荷，并且在再次跳频到频带＃1之后继续步进响应。不久，电容器＃1的充电/放电停止并达到稳定状态。

18. 发明授权

US07236513B2 Transmission method and transmitter 有权
标题翻译：传输方式和发射机
公开(公告)号：US07236513B2
公开(公告)日：2007-06-26
申请号：US10763173
申请日：2004-01-26
申请人： Sachio Iida
发明人： Sachio Iida
IPC分类号： H04L17/02
CPC分类号： H04B1/7174 , H04B1/719
摘要： An objective is to perform pulse modulation so as to allow for an effect of inter-symbol interference in the UWB communication. For this purpose, a reference clock signal is generated. Spread data is sequentially output at a specified timing synchronized with the reference clock. In this case, the spread data results from directly spreading transmission data with a spreading code. The spread data is distributed into two sequences of data at a specified timing synchronized with the reference clock. First and second pulse shaping signals are generated at a specified timing synchronized with the reference clock. A cosine carrier and a sine carrier are generated. One of the two sequences of data is multiplied by the first pulse shaping signal and the cosine carrier. The other of the two sequences of data is multiplied by the second pulse shaping signal and the sine carrier. Outputs from the multiplications are synthesized to acquire an output signal for transmission.
摘要翻译：目的是进行脉冲调制以便允许UWB通信中符号间干扰的影响。为此，产生参考时钟信号。扩展数据在与参考时钟同步的指定定时顺序地输出。在这种情况下，扩展数据是由扩展码直接扩展发送数据而产生的。扩展数据以与参考时钟同步的指定定时分配到两个数据序列中。在与参考时钟同步的指定定时产生第一和第二脉冲整形信号。产生余弦载波和正弦载波。数据的两个序列中的一个与第一脉冲整形信号和余弦载波相乘。两个数据序列中的另一个与第二脉冲整形信号和正弦载波相乘。来自乘法的输出被合成以获取用于传输的输出信号。

19. 发明申请

US20050159129A1 Image rejection mixer and multiband generator 失效
公开(公告)号：US20050159129A1
公开(公告)日：2005-07-21
申请号：US10946063
申请日：2004-09-22
申请人： Sachio Iida
发明人： Sachio Iida
IPC分类号： H03H7/06 , H03D7/18 , H03H7/21 , H04B1/10 , H04B1/18 , H04B1/26
CPC分类号： H04B1/71635 , H03H2007/0192
摘要： The present invention suppresses a harmonic component without impairing the phase orthogonality of a pair of complex signals. A polyphase filter is configured so that K pieces of filter circuits, each of which comprises a resistor and a capacitor, are connected and +360/K degrees out of phase with a preceding one. Since counterclockwise rotation occurs when expression is given in terms of the complex plane, a notch occurs in a negative frequency region. A RC value is set so that a notch occurs in a specified frequency band to suppress a (4N+1)-order harmonic component. Since the polyphase filter has a symmetrical structure, an unbalanced component contained in an input signal is eliminated at a frequency that agrees with a pole determined by the RC value. This action improves the orthogonality.

20. 发明授权

US5406225A Bias control circuit for radio-frequency power amplifier 失效
标题翻译：射频功率放大器的偏置控制电路
公开(公告)号：US5406225A
公开(公告)日：1995-04-11
申请号：US158766
申请日：1993-11-30
申请人： Sachio Iida , Norio Shimo , Hideaki Sato
发明人： Sachio Iida , Norio Shimo , Hideaki Sato
IPC分类号： H03F1/02 , H03F1/30 , H03F3/193 , H03F3/20 , H04B1/04 , H03G3/30
CPC分类号： H03F1/0244 , H03F1/301 , H03F2200/481 , H03F2200/483
摘要： A bias control circuit for a radio-frequency power amplifier which performs linear power amplification of an intermittent radio-frequency signal. The control circuit includes a bias voltage setting circuit for supplying a bias voltage of a predetermined value to a power amplifying element during a time period in which substantially none of the radio-frequency signal is supplied to the power amplifying element, and for setting the idle current of the power amplifying element to a predetermined value. The control circuit further includes a sample and hold circuit for sampling and holding the bias voltage during the time period in which substantially none of the radio-frequency signal is supplied to the power amplifying element. The output voltage of the sample and hold circuit is supplied as a bias voltage to the power amplifying element during the subsequent time period of supply of the radio-frequency signal to the power amplifying element, whereby the idle current of the power amplifying element is stabilized despite any temperature fluctuation.
摘要翻译：一种用于执行间歇射频信号的线性功率放大的射频功率放大器的偏置控制电路。控制电路包括偏置电压设定电路，用于在基本上没有一个射频信号提供给功率放大元件的时间段内向功率放大元件提供预定值的偏置电压，并且用于设置空闲功率放大元件的电流达到预定值。控制电路还包括采样和保持电路，用于在基本上没有一个射频信号被提供给功率放大元件的时间段内对偏置电压进行采样和保持。在向功率放大元件供给的后续时间期间，采样保持电路的输出电压作为偏置电压被提供给功率放大元件，由此功率放大元件的空闲电流被稳定尽管有任何温度波动。

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