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。

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。

公开(公告)号：US06608510B2

公开(公告)日：2003-08-19

申请号：US09820881

申请日：2001-03-30

申请人： Taizo Yamawaki ,  Satoshi Tanaka ,  Norio Hayashi ,  Kazuo Watanabe ,  Bob Henshaw

发明人： Taizo Yamawaki ,  Satoshi Tanaka ,  Norio Hayashi ,  Kazuo Watanabe ,  Bob Henshaw

IPC分类号： H03L706

CPC分类号： H03L7/085 ,  H03L7/07 ,  H03L7/10 ,  H03L2207/12

摘要： The present invention provides a PLL circuit, which can make convergence at a high speed and convert an IF signal into an RF signal, and a wireless mobile station with that PLL circuit. An LPF charging constant current source, a discharging constant current source and a high-speed charging constant current source are connected to an output terminal of a phase comparator with current mode output of the PLL circuit. By doing so, in the case where a convergence frequency of the PLL circuit is low, an input voltage of a VCO is increased from 0V so as to be converged by using the constant current source. Meanwhile, in the case where the convergence frequency of the PLL circuit is high, the input voltage of the PLL circuit is temporarily increased to the maximum voltage by using the constant current source. Thereafter, the input voltage is gradually dropped from the maximum voltage so as to be converged by using the constant current source. Thus, the above operation is selected by the convergence frequency, and thereby, it is possible to shorten the maximum convergence time of the PLL circuit.

公开(公告)号：US08494456B2

公开(公告)日：2013-07-23

申请号：US13592723

申请日：2012-08-23

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：US20120320957A1

公开(公告)日：2012-12-20

申请号：US13592723

申请日：2012-08-23

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：US20120064840A1

公开(公告)日：2012-03-15

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： H04B1/40

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.

公开(公告)号：US08107912B2

公开(公告)日：2012-01-31

申请号：US12975488

申请日：2010-12-22

申请人： Satoshi Tanaka ,  Kazuo Watanabe ,  Masao Hotta ,  Toyohiko Hongo ,  Taizo Yamawaki ,  Masumi Kasahara ,  Kumiko Takikawa

发明人： Satoshi Tanaka ,  Kazuo Watanabe ,  Masao Hotta ,  Toyohiko Hongo ,  Taizo Yamawaki ,  Masumi Kasahara ,  Kumiko Takikawa

IPC分类号： H04B1/06 ,  H04B7/00 ,  H04B1/10

CPC分类号： H04B1/30 ,  H03D2200/0047 ,  H03K21/16

摘要： A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.

摘要翻译： 适合较大规模集成的收发器采用直接转换接收，以减少滤波器的数量。 此外，通过利用分频器来为RF频带提供具有本地振荡信号的接收机和发射机来减少VCO的数量。 每个具有固定分频比的分频器用于产生用于接收机的局部振荡信号，而具有可切换分频比的分频器用于产生用于发射机的本地振荡信号。 另外，用于基带信号的可变增益放大器设置有DC偏移电压检测器和DC偏移消除电路，用于支持高速数据通信以通过消除用于偏移的反馈回路内的滤波器的干涉来实现DC偏移的快速消除 消除。

公开(公告)号：US08036605B2

公开(公告)日：2011-10-11

申请号：US12336178

申请日：2008-12-16

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： H04B1/40

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. Increase in the number of voltage-controlled oscillators for multiband communication, broadening of the band, and increase in phase noise can be reduced.

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。 可以减少用于多频带通信的压控振荡器的数量的增加，频带的扩大以及相位噪声的增加。

公开(公告)号：US20100113089A1

公开(公告)日：2010-05-06

申请号：US12684256

申请日：2010-01-08

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： H04W88/06 ,  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。

公开(公告)号：US07702359B2

公开(公告)日：2010-04-20

申请号：US11703166

申请日：2007-02-07

申请人： Satoshi Tanaka ,  Taizo Yamawaki ,  Kazuaki Hori ,  Kazuo Watanabe

发明人： Satoshi Tanaka ,  Taizo Yamawaki ,  Kazuaki Hori ,  Kazuo Watanabe

IPC分类号： H04M1/00

CPC分类号： H03D3/007 ,  H03C3/40 ,  H04B1/30

摘要： Disclosed is a direct conversion type transmitter or transceiver circuit suitable for a mobile communication device which corresponds to broad signal output level variable width to be required by W-CDMA, which does not necessitate any high-performance low noise VCO and RF filter, capable of reducing a number of components and the cost. In the input portion of an orthogonal modulator composed of a divider, mixers, and a common load, there are provided variable attenuators. If an input signal level of the orthogonal modulator within the transmitter circuit lowers, this variable attenuator circuit is operated so as to lower the bias of the orthogonal modulator to reduce the amount of occurrence of carrier leak, and to prevent the signal during low output level and carrier leak ratio from being deteriorated. The direct conversion transmitter circuit is capable of easily realizing output level variable width of 70 dB or higher and reducing a variable amount in the high frequency circuit in which it is difficult to secure the variable gain width.

摘要翻译： 公开了一种适用于移动通信设备的直接转换型发射器或收发器电路，其对应于由W-CDMA所要求的宽信号输出电平可变宽度，其不需要任何高性能低噪声VCO和RF滤波器，其能够 减少了一些组件和成本。 在由分频器，混频器和公共负载组成的正交调制器的输入部分中，提供可变衰减器。 如果发射机电路内的正交调制器的输入信号电平降低，则该可变衰减器电路被工作，以降低正交调制器的偏置，以减少载波泄漏的发生量，并且防止在低输出电平期间的信号 并且载体泄漏率不劣化。 直接变换发送电路能够容易地实现70dB以上的输出电平可变宽度，并且在难以确保可变增益宽度的高频电路中减少可变量。