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61. 发明申请

US20110128171A1 ANALOG/DIGITAL CONVERTER AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE 有权
标题翻译：模拟/数字转换器和半导体集成电路器件
公开(公告)号：US20110128171A1
公开(公告)日：2011-06-02
申请号：US12676357
申请日：2009-02-19
申请人： Takashi Oshima , Taizo Yamawaki , Tomomi Takahashi
发明人： Takashi Oshima , Taizo Yamawaki , Tomomi Takahashi
IPC分类号： H03M1/10
CPC分类号： H03M1/1009 , H03M1/00 , H03M1/0695 , H03M1/1028 , H03M1/12 , H03M1/1215 , H03M1/804
摘要： In the digital calibration technique of the conventional time-interleaved analog/digital converter, it is impossible to perform highly-accurate calibration that supports a high-speed sampling rate of the next-generation application and achieves a high resolution. For its solution, a reference A/D conversion unit is connected in parallel to an input common to a time-interleaved A/D converter to be a calibration target, and the output of each unitary A/D conversion unit which makes up the time-interleaved A/D converter is calibrated in a digital region by using a low-speed high-resolution A/D conversion result output from the reference A/D conversion unit. Also, fCLK/N (fCLK represents an overall sampling rate of the time-interleaved A/D converter, and N is relatively prime to the number of unitary A/D conversion units connected in parallel M) is set as the operation clock frequency of the reference A/D conversion unit. In this configuration, samplings of all unitary A/D conversion units can be sequentially synchronized with the sampling of the reference A/D conversion unit, and the operation clock frequency of the reference A/D converter can be made N times slower than the overall sampling rate of the time-interleaved A/D converter.
摘要翻译：在传统的时间交错模拟/数字转换器的数字校准技术中，不可能执行支持下一代应用的高速采样率的高精度校准，并实现高分辨率。对于其解决方案，参考A / D转换单元并联连接到时间交织的A / D转换器的公共端作为校准目标，并且构成时间的每个单位A / D转换单元的输出通过使用从参考A / D转换单元输出的低速高分辨率A / D转换结果，在数字区域校准交错A / D转换器。另外，fCLK / N（fCLK表示时间交织的A / D转换器的总体采样率，N是并行连接的单位A / D转换单元的数量的N相对于M）被设定为操作时钟频率参考A / D转换单元。在这种配置中，所有单一A / D转换单元的采样可以与参考A / D转换单元的采样顺序同步，并且参考A / D转换器的操作时钟频率可以比总体的N倍慢时间交织A / D转换器的采样率。

62. 发明授权

US07843369B2 Analog-to-digital converter and communication device and wireless transmitter and receiver using the same 有权
标题翻译：模拟数字转换器和通信设备以及使用相同的无线发射机和接收机
公开(公告)号：US07843369B2
公开(公告)日：2010-11-30
申请号：US12270212
申请日：2008-11-13
申请人： Tomomi Takahashi , Takashi Oshima , Taizo Yamawaki
发明人： Tomomi Takahashi , Takashi Oshima , Taizo Yamawaki
IPC分类号： H03M1/10
CPC分类号： H03M1/1033 , H03M1/12
摘要： In a wireless transmitter and receiver, a background calibration type analog-to-digital converter generally occupies a large area because of the phase compensating capacity of an op-amp included in a reference analog-to-digital conversion unit. Further, the calibration type analog-to-digital converter generally requires a sample and hold circuit to exclude influence of parasitic capacitance of wirings, thereby increasing power consumption. Digital calibration is performed by using, as a signal for calibration, an input signal of a digital-to-analog converter in a transmitter circuit of the wireless transmitter and receiver and inputting an output signal from the digital-to-analog converter to the analog-to-digital converter in the receiver circuit.
摘要翻译：在无线发射机和接收机中，由于参考模数转换单元中包含的运算放大器的相位补偿能力，背景校准型模拟 - 数字转换器通常占用大面积。此外，校准型模拟 - 数字转换器通常需要采样和保持电路来排除布线的寄生电容的影响，从而增加功耗。通过使用无线发射机和接收机的发射机电路中的数模转换器的输入信号作为校准信号，并将来自数模转换器的输出信号输入到模拟数字校准数字转换器。

63. 发明授权

US07764216B2 Analog-to-digital converter, method of controlling the same, and wireless transceiver circuit 有权
标题翻译：模数转换器，控制方法和无线收发电路
公开(公告)号：US07764216B2
公开(公告)日：2010-07-27
申请号：US12216821
申请日：2008-07-11
申请人： Takashi Oshima , Taizo Yamawaki
发明人： Takashi Oshima , Taizo Yamawaki
IPC分类号： H03M1/12
CPC分类号： H03M1/1042 , H03M1/0673 , H03M1/0692 , H03M1/183 , H03M1/44 , H03M1/46
摘要： In an analog-to-digital converter, when a capacitive element with a small capacitance is used in order to reduce power consumption, the characteristics of the analog-to-digital converter deteriorate due to the variation in the specific accuracy. Further, the method of reducing the variation with the specific accuracy causes an increase in the size of the circuit and power consumption. An analog-to-digital converter includes an analog core unit having at least one capacitive element. The capacitive element includes a capacitive bank having plural capacitive element units having substantially the same capacitance value, and the capacitive bank is configured to select one capacitive element unit from the plural capacitive element units with substantially equal probability.
摘要翻译：在模数转换器中，当使用具有小电容的电容元件以降低功耗时，由于特定精度的变化，模数转换器的特性恶化。此外，以特定精度减小变化的方法导致电路的尺寸和功耗的增加。模数转换器包括具有至少一个电容元件的模拟核心单元。电容元件包括具有多个具有大致相同的电容值的电容元件单元的电容库，并且该电容库被配置为以几乎相等的概率从多个电容元件单元中选择一个电容元件单元。

64. 发明申请

US20100171553A1 POWER CIRCUIT 有权
标题翻译：电源电路
公开(公告)号：US20100171553A1
公开(公告)日：2010-07-08
申请号：US12644833
申请日：2009-12-22
申请人： Yoichi Okubo , Manabu Nakamura , Junya Dosaka , Yasuhiro Takeda , Taizo Ito , Naoki Hongo , Taizo Yamawaki , Takashi Kawamoto , Akira Maeki
发明人： Yoichi Okubo , Manabu Nakamura , Junya Dosaka , Yasuhiro Takeda , Taizo Ito , Naoki Hongo , Taizo Yamawaki , Takashi Kawamoto , Akira Maeki
IPC分类号： H03G1/00
CPC分类号： H03F1/0227 , H03F3/19 , H03F2200/451 , H03F2200/462
摘要： A power circuit used for an amplifier, which includes an amplifier provided with a linear amplifier serving as a voltage source, a DC/DC converter serving as a current source, a hysteresis comparator controlling the DC/DC converter, and a current detector detecting output current from the linear amplifier to output the detected output current to the hysteresis comparator; and a switching restricting means for restricting a switching interval in the DC/DC converter such that the switching interval is not equal to or less than a constant time or is not shorter than the constant time.
摘要翻译：用于放大器的电源电路，其包括放大器，该放大器设置有用作电压源的线性放大器，用作电流源的DC / DC转换器，控制DC / DC转换器的滞环比较器以及电流检测器检测输出电流从线性放大器输出检测输出电流到滞后比较器; 以及切换限制装置，用于限制DC / DC转换器中的切换间隔，使得切换间隔不等于或小于恒定时间或不短于恒定时间。

65. 发明授权

US07657282B2 Multimode wireless communication apparatus and high frequency integrated circuit therefor 有权
标题翻译：多模无线通信装置及其高频集成电路
公开(公告)号：US07657282B2
公开(公告)日：2010-02-02
申请号：US10372269
申请日：2003-02-25
申请人： May Suzuki , Taizo Yamawaki , Satoshi Tanaka , Akio Yamamoto
发明人： May Suzuki , Taizo Yamawaki , Satoshi Tanaka , Akio Yamamoto
IPC分类号： H04M1/00
CPC分类号： H04W88/06
摘要： A multimode wireless communication apparatus including a radio frequency unit having controllable communication mode and a control unit for periodically making the radio frequency unit operate in a mobile telephone mode and, after predetermined time, switching the mode to a wireless LAN mode, wherein if occurrence of an incoming call event is detected when the radio frequency unit is in standby reception in the mobile telephone mode, the control unit suppresses the switching to the wireless LAN mode and determines whether the communication in the mobile telephone mode should be continued or not.
摘要翻译：一种多模无线通信装置，包括具有可控通信模式的射频单元和用于周期性地使射频单元以移动电话模式工作的控制单元，并且在预定时间之后将模式切换到无线LAN模式，其中如果发生当无线电频率单元在移动电话模式下处于待机接收时，检测到呼入事件，控制单元禁止切换到无线LAN模式，并确定是否应该继续移动电话模式的通信。

66. 发明授权

US07519337B2 Transmitter and mobile communication terminal using the same 失效
标题翻译：发射机和移动通信终端使用相同
公开(公告)号：US07519337B2
公开(公告)日：2009-04-14
申请号：US11304914
申请日：2005-12-16
申请人： Masahiro Ito , Taizo Yamawaki , Yoshiaki Harasawa
发明人： Masahiro Ito , Taizo Yamawaki , Yoshiaki Harasawa
IPC分类号： H01Q11/12
CPC分类号： H04B1/0475 , H03F1/0205 , H03F1/0261 , H03F2200/294
摘要： A transmitter employing variable gain amplifiers and operating with both constant and nonconstant envelope modulation systems is contrived to suppress variation in the transmitting power when constant envelope modulation is performed. The transmitter comprises a PM loop, an AM loop, and a variable gain amplifier which is shared by the PM loop and the AM loop and combines phase information that the PM loop outputs and envelope information that the AM loop outputs by gain control. The variable gain amplifier comprises a variable gain amplifier body having a supply voltage terminal and a bias current detection terminal for extracting a bias current corresponding to a gain, wherein the gain changes with a change in the potential of the supply voltage terminal, and a bias control block connected to the supply voltage terminal and the bias current detection terminal. Thereby, a bias control loop is formed to control the bias current so that the gain in the case of constant envelope modulation becomes a predetermined value.
摘要翻译：采用可变增益放大器并且使用恒定和非恒定包络调制系统进行操作的发射机被设计成在执行恒定包络调制时抑制发射功率的变化。发射机包括由PM环路和AM环路共享的PM环路，AM环路和可变增益放大器，并组合PM环路输出的相位信息和AM环路通过增益控制输出的包络信息。可变增益放大器包括具有电源电压端子的可变增益放大器体和用于提取与增益相对应的偏置电流的偏置电流检测端子，其中增益随着电源电压端子的电位变化而变化，偏置控制块连接到电源电压端子和偏置电流检测端子。由此，形成偏置控制环以控制偏置电流，使得在恒定包络调制的情况下的增益变为预定值。

67. 发明申请

US20090091482A1 DIGITAL CALIBRATION TYPE ANALOG-TO-DIGITAL CONVERTER AND WIRELESS RECEIVER CIRCUIT AND WIRELESS TRANSCEIVER CIRCUIT USING THE SAME 有权
标题翻译：数字校准型模拟数字转换器和无线接收器电路及无线收发器电路
公开(公告)号：US20090091482A1
公开(公告)日：2009-04-09
申请号：US12244971
申请日：2008-10-03
申请人： Takashi OSHIMA , Taizo Yamawaki
发明人： Takashi OSHIMA , Taizo Yamawaki
IPC分类号： H03M1/10 , H03M1/12
CPC分类号： H03M1/1004 , H03M1/002 , H03M1/005 , H03M1/1009 , H03M1/126 , H03M1/44
摘要： In a wireless chip receiving the multi-rate data according to the related art, power consumption and a circuit area of an analog-to-digital converter become large. In a digital calibration type analog-to-digital converter including both a reference analog-to-digital conversion unit and a main analog-to-digital conversion unit, when processing the high-sample rate wireless receive signal, both the reference analog-to-digital conversion unit and the main analog-to-digital conversion unit are operated to configure a general digital calibration type analog-to-digital converter, and when processing a low-sample rate wireless receive signal, analog-to-digital conversion is performed by using the reference analog-to-digital conversion unit and operations of the main analog-to-digital conversion unit or the like are stopped to remarkably reduce power consumption.
摘要翻译：在接收根据现有技术的多速率数据的无线芯片中，功率消耗和模数转换器的电路面积变大。在包括参考模数转换单元和主模数转换单元的数字校准类型模数转换器中，当处理高抽样率无线接收信号时，参考模拟到数字转换单元操作数字转换单元和主模拟 - 数字转换单元来配置通用数字校准类型模数转换器，并且当处理低采样率无线接收信号时，执行模拟 - 数字转换通过使用参考模数转换单元，并且停止主模数转换单元等的操作以显着地降低功耗。

68. 发明申请

US20080311860A1 TRANSCEIVER 有权
标题翻译：收发器
公开(公告)号：US20080311860A1
公开(公告)日：2008-12-18
申请号：US12135190
申请日：2008-06-08
申请人： Satoshi Tanaka , Hiroshi Kamizuma , Koji Maeda , Sungwoo Cha , Yukinori Akamine , Taizo Yamawaki
发明人： Satoshi Tanaka , Hiroshi Kamizuma , Koji Maeda , Sungwoo Cha , Yukinori Akamine , Taizo Yamawaki
IPC分类号： H04B1/38
CPC分类号： H04B1/28
摘要： The transmitter of the transceiver includes: a transmitter-side mixers of a transmitter-side modulator; a transmitter-side voltage-controlled oscillator; and a transmitter-side divider. The divider having a dividing factor of a non-integral number is supplied with an oscillating output of the oscillator. A pair of non-quadrature local signals having a phase difference of 90° plus a predetermined offset angle is produced by the divider and supplied to the mixers. The transmitter includes a phase-shift unit which converts a pair of quadrature transmit signals having a phase difference of about 90° on an analog basis into a pair of non-quadrature shifted transmit signals. Consequently, quadrature modulation is performed by the mixers. Use of a similar configuration enables the reduction in interference of an RF signal with local signals supplied to receiver-side mixers of the receiver.
摘要翻译：收发器的发射机包括：发射机侧调制器的发射机侧混频器; 发射机侧压控振荡器; 和发射机侧分频器。具有非积分数的分频因子的分频器被提供有振荡器的振荡输出。具有90°相位差和预定偏移角的一对非正交本地信号由分频器产生并提供给混频器。发射机包括相移单元，其将具有大约90°的相位差的一对正交发射信号在模拟上转换成一对非正交移位的发射信号。因此，正交调制由混频器执行。使用类似的配置使得能够减少RF信号与提供给接收机的接收机侧混频器的本地信号的干扰。

69. 发明授权

US07463876B2 Communication semiconductor integrated circuit, communication electronic component and wireless communication system 有权
标题翻译：通信半导体集成电路，通信电子元件和无线通信系统
公开(公告)号：US07463876B2
公开(公告)日：2008-12-09
申请号：US11371108
申请日：2006-03-09
申请人： Hiroaki Matsui , Taizo Yamawaki , Yoshiaki Harasawa , Steve Williams
发明人： Hiroaki Matsui , Taizo Yamawaki , Yoshiaki Harasawa , Steve Williams
IPC分类号： H04B1/28 , H01Q11/12
CPC分类号： H03F3/211 , H03F3/45085 , H03F2200/78 , H03G3/3042
摘要： A communication semiconductor integrated circuit includes a phase control loop and an amplitude control loop. A gain of a variable gain amplifier when it is detected from an output of the comparator that the amplitudes of the reference signal and the feedback signal are equal to each other while a predetermined DC voltage is applied to an amplifier which amplifies an output of a transmission oscillation circuit and is controlled by the amplitude control loop to vary the gain of the variable gain amplifier on a feedback path is held in a register. Thereafter, the DC voltage is changed to another value to detect the gain of the variable gain amplifier, so that the gain of a variable gain amplifier on the forward path is decided on the basis of the detected gain and the gain held in the register.
摘要翻译：通信半导体集成电路包括相位控制环路和幅度控制环路。当从比较器的输出检测到可变增益放大器的增益时，参考信号和反馈信号的幅度彼此相等，同时将预定的DC电压施加到放大器，其放大传输的输出振荡电路并由幅度控制环路控制，将可变增益放大器的增益在反馈路径上保持在寄存器中。此后，将DC电压改变为另一个值以检测可变增益放大器的增益，从而基于检测到的增益和保持在寄存器中的增益来确定正向通路上的可变增益放大器的增益。

70. 发明授权

US07184491B2 Wireless communication apparatus 有权
标题翻译：无线通信装置
公开(公告)号：US07184491B2
公开(公告)日：2007-02-27
申请号：US10655045
申请日：2003-09-05
申请人： May Suzuki , Satoshi Tanaka , Taizo Yamawaki , Tomonori Tanoue
发明人： May Suzuki , Satoshi Tanaka , Taizo Yamawaki , Tomonori Tanoue
IPC分类号： H04K1/02
CPC分类号： H03F3/24 , H03F1/02 , H03F1/0205 , H03F1/0227 , H03F1/32 , H03F2200/102 , H03F2200/324 , H03F2200/451 , H03F2200/504 , H03F2200/66 , H04B2001/045 , H04L27/20
摘要： A linear system and an EER system are used in combination such that the EER system can also be used in a cellular phone with a wide output dynamic range. In the EER system, linear control of an amplifier becomes difficult in a low output range. Thus, use of the EER system is limited to a high output range, and the linear system is used in the low output range as in the past. A power efficiency is improved while requirements of linearity are satisfied by this structure. An effective circuit structure is proposed for a switching control system for two systems. In addition, an up-converter is constituted in combination with a step-down element with high responsiveness, whereby a power supply voltage control circuit for the EER system with a wide control range and high responsiveness is provided.
摘要翻译：线性系统和EER系统组合使用，使得EER系统也可以用在具有宽输出动态范围的蜂窝电话中。在EER系统中，放大器的线性控制在低输出范围内变得困难。因此，EER系统的使用被限制在高输出范围，并且线性系统如以往那样在低输出范围内使用。通过这种结构满足线性要求，提高了功率效率。提出了一种用于两个系统的开关控制系统的有效电路结构。此外，上变频器与具有高响应性的降压元件组合构成，由此提供了具有宽控制范围和高响应性的EER系统的电源电压控制电路。

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