公开(公告)号：US07333779B2

公开(公告)日：2008-02-19

申请号：US11121018

申请日：2005-05-04

申请人： Taizo Yamawaki ,  Takefumi Endo ,  Kazuo Watanabe ,  Kazuaki Hori ,  Julian Hildersley

发明人： Taizo Yamawaki ,  Takefumi Endo ,  Kazuo Watanabe ,  Kazuaki Hori ,  Julian Hildersley

IPC分类号： H01Q11/12 ,  H04B1/04

CPC分类号： H03L7/10 ,  H03D13/007 ,  H03L7/08 ,  H03L7/085 ,  H03L7/093 ,  H03L7/099 ,  H03L7/16 ,  H03L2207/12 ,  H04B1/406

摘要： In a PLL circuit, the number of LPFs is reduced to one to reduce mounting area and pin number, and to simplify design. In one embodiment, the PLL circuit includes a variable-gain phase comparator, a mixer, an LPF, VCOs, couplers, and a control circuit to controlling the on/off operation of the VCOs. The variable-gain phase comparator is capable of varying a phase difference gain. The on/off of the operation of the VCOs is controlled by the control circuit so that one of the VCOs is turned off. The phase difference conversion gain is varied in accordance with the sensitivity of the VCOs so the number of LPFs required for the PLL circuit can be reduced to only one.

摘要翻译： 在PLL电路中，将LPF的数量减少到一个，以减少安装面积和引脚数量，并简化设计。 在一个实施例中，PLL电路包括可变增益相位比较器，混频器，LPF，VCO，耦合器以及控制VCO的开/关操作的控制电路。 可变增益相位比较器能够改变相位差增益。 VCO的操作的开/关由控制电路控制，使得VCO中的一个被关断。 相位差转换增益根据VCO的灵敏度而变化，因此PLL电路所需的LPF的数量可以减少到一个。

公开(公告)号：US20060135093A1

公开(公告)日：2006-06-22

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.

公开(公告)号：US20050220217A1

公开(公告)日：2005-10-06

申请号：US11017076

申请日：2004-12-21

申请人： Taizo Yamawaki ,  Masahiro Ito ,  Masumi Kasahara ,  Hiroaki Matsui

发明人： Taizo Yamawaki ,  Masahiro Ito ,  Masumi Kasahara ,  Hiroaki Matsui

IPC分类号： H03C5/00 ,  H03G3/30 ,  H04B1/04 ,  H04K1/02 ,  H04L27/00 ,  H04L27/12 ,  H04L27/20

CPC分类号： H04L27/0008 ,  H03F1/02 ,  H03F3/24 ,  H04B2001/045

摘要： A transmitter that can reduce noise without using an SAW filter whose IC integration is hard, and copes with two modulation formats of constant envelope modulation and non-constant envelope modulation, and a downsized and low-cost wireless communication apparatus that uses the transmitter are provided. The transmitter includes a quadrature modulator that modulates an input signal by quadrature modulation, a first amplifier that amplifies a modulation signal outputted by the quadrature modulator, and a second amplifier that amplifies an output signal of the first amplifier. The first amplifier operates as a limiter when the modulation format is the constant envelope modulation, and performs linear operation when the modulation format is the non-constant envelope modulation.

摘要翻译： 提供一种能够在不使用集成硬件的SAW滤波器的情况下降低噪声的发射机，并且应用恒定包络调制和非恒定包络调制的两种调制格式，以及使用发射机的小型化和低成本的无线通信装置 。 发射机包括通过正交调制来调制输入信号的正交调制器，放大由正交调制器输出的调制信号的第一放大器和放大第一放大器的输出信号的第二放大器。 当调制格式为恒定包络调制时，第一放大器用作限幅器，并且当调制格式是非恒定包络调制时，执行线性运算。

公开(公告)号：US20050215222A1

公开(公告)日：2005-09-29

申请号：US11121018

申请日：2005-05-04

申请人： Taizo Yamawaki ,  Takefumi Endo ,  Kazuo Watanabe ,  Kazuaki Hori ,  Julian Hildersley

发明人： Taizo Yamawaki ,  Takefumi Endo ,  Kazuo Watanabe ,  Kazuaki Hori ,  Julian Hildersley

IPC分类号： H03L7/10 ,  H03D13/00 ,  H03L7/00 ,  H03L7/08 ,  H03L7/085 ,  H03L7/093 ,  H03L7/099 ,  H03L7/107 ,  H03L7/16 ,  H03L7/18 ,  H04B1/3822 ,  H04B1/40 ,  H04L7/033

CPC分类号： H03L7/10 ,  H03D13/007 ,  H03L7/08 ,  H03L7/085 ,  H03L7/093 ,  H03L7/099 ,  H03L7/16 ,  H03L2207/12 ,  H04B1/406

摘要： In a PLL circuit, the number of LPFs is reduced to one to reduce mounting area and pin number, and to simplify design. In one embodiment, the PLL circuit includes a variable-gain phase comparator, a mixer, an LPF, VCOs, couplers, and a control circuit to controlling the on/off operation of the VCOs. The variable-gain phase comparator is capable of varying a phase difference gain. The on/off of the operation of the VCOs is controlled by the control circuit so that one of the VCOs is turned off. The phase difference conversion gain is varied in accordance with the sensitivity of the VCOs so the number of LPFs required for the PLL circuit can be reduced to only one.

公开(公告)号：US20050176388A1

公开(公告)日：2005-08-11

申请号：US10509753

申请日：2003-02-18

申请人： Taizo Yamawaki ,  Hisayoshi Kajiwara ,  Ryoichi Takano ,  Patrick Wurm

发明人： Taizo Yamawaki ,  Hisayoshi Kajiwara ,  Ryoichi Takano ,  Patrick Wurm

IPC分类号： H03F3/189 ,  H03G3/30 ,  H04B1/04 ,  H04L27/36 ,  H01Q11/12

CPC分类号： H03G3/3042 ,  H03F1/34 ,  H03F3/24 ,  H04B1/0475 ,  H04B2001/0433 ,  H04L27/361

摘要： In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with lag-lead characteristics (secondary or more filter including a capacitor and a resistor) and a second filter of a perfect integrator type (filter including only a capacitor) are employed, and current-output type circuits are connected to respective front stages of the first and second filters.

摘要翻译： 在具有相位控制环路和幅度控制环路的极性环路架构的发射机中，作为用于控制振幅控制环路的环路频带的环路滤波器，具有滞后引线特性的第一滤波器（包括电容器和 电阻器）和完美积分器型（仅包括电容器的滤波器）的第二滤波器，并且电流输出型电路连接到第一和第二滤波器的各个前级。

公开(公告)号：US20050136847A1

公开(公告)日：2005-06-23

申请号：US11011153

申请日：2004-12-15

申请人： Hiroaki Matsui ,  Taizo Yamawaki ,  Masahiro Ito ,  Masakatsu Yokota

发明人： Hiroaki Matsui ,  Taizo Yamawaki ,  Masahiro Ito ,  Masakatsu Yokota

IPC分类号： H03G11/00 ,  H03F1/32 ,  H03F1/52 ,  H03F3/195 ,  H03F3/45 ,  H03F3/72 ,  H03G3/10 ,  H03G3/30 ,  H04B1/44

CPC分类号： H03F3/45286 ,  H03F1/3211 ,  H03F1/52 ,  H03F3/195 ,  H03F3/72 ,  H03F2200/09 ,  H03F2200/111 ,  H03F2203/45638 ,  H03F2203/45704 ,  H03F2203/45706 ,  H03G3/3042

摘要： A communication semiconductor integrated circuit (high frequency IC) that has a function of differentially-singly converts and outputs a transmitted signal suppressing deterioration of a harmonic suppression characteristic and enables miniaturization and an electronic component (high frequency module) that mounts the communication semiconductor integrated circuit are provided. In the communication semiconductor integrated circuit (high frequency IC) having a limiter that amplifies a modulated and up-converted transmitted signal and supplies a power amplifier with the signal, an unbalanced reduction means having, for example, differential MOS transistors is provided in collectors or drains of differential transistors that construct the limiter to output pins and continue to apply a current to the output pins and reduces the impedance of the transistor on an off side even when one of the transistors enters an off state in accordance with an input signal in parallel to the transistor.

摘要翻译： 具有差分单变换功能的通信用半导体集成电路（高频IC），输出抑制谐波抑制特性的劣化的发送信号，能够实现小型化，以及安装通信半导体集成电路的电子部件（高频模块） 被提供。 在具有放大经调制和上变频的发送信号并向功率放大器供给该信号的限幅器的通信半导体集成电路（高频IC）中，具有例如差分MOS晶体管的不平衡减小装置设置在收集器或 差分晶体管的漏极构成限制器以输出引脚并且继续向输出引脚施加电流，并且即使当晶体管中的一个根据并行的输入信号进入截止状态时也减小了晶体管在截止侧的阻抗 到晶体管。

公开(公告)号：US08346180B2

公开(公告)日：2013-01-01

申请号：US13238249

申请日：2011-09-21

申请人： Hiroshi Kamizuma ,  Satoshi Tanaka ,  Taizo Yamawaki ,  Yukinori Akamine ,  Koji Maeda

发明人： Hiroshi Kamizuma ,  Satoshi Tanaka ,  Taizo Yamawaki ,  Yukinori Akamine ,  Koji Maeda

IPC分类号： H04B1/38

CPC分类号： H04B1/0082

摘要： A transceiver includes an oscillator and a plurality of communication blocks. Each of the communication blocks includes frequency dividers and mixers. Frequency dividing number of the frequency divider included in one communication block is set to an even-numbered integer, and transmission local signals supplied from the frequency dividers to the mixer become quadrature signals having a phase difference of 90 degrees. The frequency dividing number of another frequency divider in the another communication block is set to a non-integer, and communication local signals supplied from the frequency divider to the mixers become non-quadrature signals having a phase difference at a predetermined offset angle from 90 degrees. The transceiver further includes a converting unit for giving a compensation offset amount having almost the same absolute value and having a polarity opposite to that of the offset angle to communication analog signals related to the mixer of the another communication block.

摘要翻译： 收发机包括振荡器和多个通信块。 每个通信块包括分频器和混频器。 包含在一个通信块中的分频器的分频数被设置为偶数整数，并且从分频器提供给混频器的发送本地信号变为具有90度相位差的正交信号。 将另一通信块中的另一个分频器的分频数设置为非整数，并且从分频器提供给混频器的通信本地信号变为具有从90度的预定偏移角的相位差的非正交信号 。 收发器还包括转换单元，用于给出具有与相对于另一通信块的混频器相关的通信模拟信号具有几乎相同的绝对值并且具有与偏移角的极性相反的极性的补偿偏移量。

公开(公告)号：US08275325B2

公开(公告)日：2012-09-25

申请号：US13303103

申请日：2011-11-22

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。

公开(公告)号：US08023995B2

公开(公告)日：2011-09-20

申请号：US11028925

申请日：2005-01-05

申请人： Akira Kuriyama ,  Taizo Yamawaki ,  Satoshi Tanaka

发明人： Akira Kuriyama ,  Taizo Yamawaki ,  Satoshi Tanaka

IPC分类号： H04M1/00

CPC分类号： H04B1/0483 ,  H04B1/0458

摘要： There is provided a radio frequency circuit device for multi-band and multi-mode which is low in a circuit loss, and a mobile communication terminal using the radio frequency circuit device. The radio frequency circuit device has a first path 110 that includes an amplifier 10a that amplifies signals of at least two modulation techniques in power, a matching network 20 that is connected to the amplifier and a duplexer 50 and allows the matching network to be coupled with an antenna, and a second path 111 that does not include the duplexer and allows the matching network to be coupled with the antenna. The first path is selected when the amplifier amplifies one of the signals of at least two modulation techniques, and the second path is selected when the amplifier amplifies another signal. An output impedance of the amplifier is matched with an impedance when viewing the antenna side from the amplifier in the first path and the second path.

摘要翻译： 提供了一种电路损耗低的用于多频和多模的射频电路装置，以及使用射频电路装置的移动通信终端。 射频电路装置具有第一路径110，其包括放大器10a，其放大至少两个功率调制技术的信号，连接到放大器的匹配网络20和双工器50，并允许匹配网络与 天线和第二路径111，其不包括双工器并且允许匹配网络与天线耦合。 当放大器放大至少两个调制技术的信号之一时，选择第一路径，并且当放大器放大另一信号时选择第二路径。 当从第一路径和第二路径中的放大器观看天线侧时，放大器的输出阻抗与阻抗匹配。

公开(公告)号：US07996003B2

公开(公告)日：2011-08-09

申请号：US11940733

申请日：2007-11-15

申请人： Koji Maeda ,  Satoshi Tanaka ,  Taizo Yamawaki ,  Yukinori Akamine ,  Masahiro Ito

发明人： Koji Maeda ,  Satoshi Tanaka ,  Taizo Yamawaki ,  Yukinori Akamine ,  Masahiro Ito

IPC分类号： H04W24/00 ,  H04B17/00

CPC分类号： H04B1/30

摘要： When generating an RF test signal for mismatch calibration for receiver in order to calibrate reception mismatch of an I-phase signal and a Q-phase signal that are output from demodulated signal processing circuits coupled to mixers for receiving, a Tx VCO avoids covering the higher frequency of an RF received signal in an FDD system. An RF test signal generating unit generates, in a calibration mode of a mismatch calibration for receiver circuit, the RF test signal by using an oscillation output signal of the Tx VCO and other circuits, and supplies the same to the mixers for receiving via a switch. The RF test signal has a frequency within an RF reception frequency band that is higher than that of an RF transmission signal with the maximum frequency band of multiband radio frequency communications. By switching the switch in a reception mode, an output of a low-noise amplifier that amplifies the RF received signal received by an antenna is supplied to each of the mixers for receiving.

摘要翻译： 为了校准从耦合到混频器进行接收的解调信号处理电路输出的I相信号和Q相信号的接收不匹配，为接收机生成用于失配校准的RF测试信号时，Tx VCO避免覆盖较高的 FDD系统中RF接收信号的频率。 RF测试信号产生单元通过使用Tx VCO和其它电路的振荡输出信号在接收机电路的不匹配校准的校准模式中产生RF测试信号，并将其提供给用于经由开关接收的混频器 。 RF测试信号具有比具有多频带无线电频率通信的最大频带的RF传输信号的RF接收频带内的频率。 通过在接收模式下切换开关，将放大天线接收到的RF接收信号的低噪声放大器的输出提供给每个混频器进行接收。