公开(公告)号：US06308047B1

公开(公告)日：2001-10-23

申请号：US09243467

申请日：1999-02-03

申请人： Kazuya Yamamoto ,  Kosei Maemura

发明人： Kazuya Yamamoto ,  Kosei Maemura

IPC分类号： H04B144

CPC分类号： H03G3/30 ,  H04B1/48

摘要： In an RF front end portion for processing a radio-frequency signal in a portable telephone, a low pass filter allowing passing of only a signal in a frequency band lower than a radio-frequency signal component band is arranged between a circuit processing a high power signal and a control circuit controlling operation of the radio-frequency signal processing circuit. The radio-frequency signal processing circuit is a transmission/reception multiplexing circuit transferring a transmission signal of the portable telephone to an antenna or receiving a reception signal from the antenna, and the control circuit is a transmission/reception control circuit determining an operation mode of the transmission/reception multiplexing switch. Alternatively, the radio-frequency signal processing circuit includes a power amplifier amplifying a signal to be transmitted, and a gate voltage control circuit generating gate bias voltage controlling a gain of the power amplifier. The influence of a radio-frequency leakage component leaking from a gate of the field effect transistor can be suppressed. In the case of the transmission/reception multiplexing switch, handing power can be improved, and an increase in power consumption and occupied area of the control circuit can be suppressed. In the case of the power amplifier, the gate bias voltage can be held stably, and the power amplification can be performed accurately. In the portable telephone, the RF front end portion processing the radio-frequency signal can be provided in a chip occupying a small area.

摘要翻译： 在用于处理便携式电话中的射频信号的RF前端部分中，仅允许通过低于射频信号分量频带的频带中的信号的低通滤波器被布置在电路处理高功率 信号和控制电路来控制射频信号处理电路的操作。 射频信号处理电路是将便携式电话的发送信号传输到天线或从天线接收接收信号的发送/接收多路复用电路，控制电路是确定便携式电话的操作模式的发送/接收控制电路 发送/接收复用开关。 或者，射频信号处理电路包括放大要发送的信号的功率放大器和产生用于控制功率放大器的增益的栅极偏置电压的栅极电压控制电路。 可以抑制从场效应晶体管的栅极泄漏的射频泄漏分量的影响。 在发送/接收复用开关的情况下，可以提高处理功率，并且可以抑制控制电路的功耗和占用面积的增加。 在功率放大器的情况下，可以稳定地保持栅极偏置电压，并且可以精确地执行功率放大。 在便携式电话中，可以在占用小面积的芯片中提供处理射频信号的RF前端部。

公开(公告)号：US5699018A

公开(公告)日：1997-12-16

申请号：US642262

申请日：1996-05-03

申请人： Kazuya Yamamoto ,  Kosei Maemura

发明人： Kazuya Yamamoto ,  Kosei Maemura

IPC分类号： H02M1/14 ,  H02M3/07 ,  H03F3/30 ,  H03F3/345 ,  H03F3/45 ,  H03F3/68 ,  H03K3/354 ,  H03K19/00 ,  H03F3/04 ,  G05F1/10

CPC分类号： H02M1/14 ,  H02M3/07 ,  H03F3/3061 ,  H03F3/3455 ,  H03K3/354

摘要： An output voltage of a negative voltage generator contains a ripple because of a ripple occurring in a voltage produced by a charge pump circuit in the negative voltage generator. When the negative voltage is supplied to an FET amplifier, there arises a possibility that an unwanted spurious component occurs in an output of the FET amplifier. Since each of pair of circuits, that generate a negative voltage, are made mutually complementary, two charge pump circuits are used to cancel ripples. A ripple appearing in an output voltage can therefore be suppressed, and a negative voltage can eventually be supplied more stably. When the negative voltage generator is connected to, for example, an FET amplifier in order to supply a gate bias voltage to each FET in the FET amplifier, an unwanted spurious component that may be contained in an output of the FET amplifier can be removed.

摘要翻译： 负电压发生器的输出电压由于在负电压发生器中由电荷泵电路产生的电压产生纹波而含有纹波。 当负电压被提供给FET放大器时，在FET放大器的输出中产生不想要的杂散分量的可能性。 由于产生负电压的一对电路是互相互补的，所以使用两个电荷泵电路来消除波纹。 因此，可以抑制出现在输出电压中的波动，并且最终可以更稳定地提供负电压。 当负电压发生器连接到例如FET放大器以便向FET放大器中的每个FET提供栅极偏置电压时，可以去除可能包含在FET放大器的输出中的不期望的杂散分量。

公开(公告)号：US5548825A

公开(公告)日：1996-08-20

申请号：US269219

申请日：1994-06-30

申请人： Kosei Maemura ,  Kazuya Yamamoto

发明人： Kosei Maemura ,  Kazuya Yamamoto

IPC分类号： H03F3/60 ,  H04B1/04 ,  H03C1/62

CPC分类号： H03F3/601 ,  H04B1/0475 ,  H03F2200/372

摘要： A transmitter of a radio communication apparatus includes a voltage controlled oscillator for converting a voltage signal input to the transmitter into a signal having a frequency according to the voltage of the voltage signal, a mixer for mixing a signal having a fixed frequency with the converted input signal and generating a signal for transmission having a frequency at which communication is substantially carried out, a frequency detector for detecting the frequency at which communication is substantially carried out, and a filter for eliminating useless signals that are included in the signal for transmission and have frequencies different from the frequency at which communication is substantially carried out. Signals having frequencies different from the frequency at which communication is substantially carried out are not radiated into space. As a result, this radio communication apparatus does not cause noise in other communication apparatus of the same kind using communication frequencies different from that of this apparatus.

摘要翻译： 无线电通信装置的发射机包括压控振荡器，用于将输入到发射机的电压信号转换成具有根据电压信号的电压的频率的信号;混频器，用于将具有固定频率的信号与转换输入 信号并产生具有基本上进行通信的频率的用于传输的信号，用于检测基本上进行通信的频率的频率检测器，以及用于消除包含在用于传输的信号中的无用信号的滤波器，并具有 与基本上进行通信的频率不同的频率。 具有与基本上进行通信的频率不同的频率的信号不会辐射到空间中。 结果，该无线电通信装置不会使用与该装置的通信频率不同的其他通信装置中的相同类型的噪声。

公开(公告)号：US07417507B2

公开(公告)日：2008-08-26

申请号：US11556257

申请日：2006-11-03

申请人： Kazuya Yamamoto ,  Tomoyuki Asada ,  Hiroyuki Otsuka ,  Kosei Maemura

发明人： Kazuya Yamamoto ,  Tomoyuki Asada ,  Hiroyuki Otsuka ,  Kosei Maemura

IPC分类号： H03F3/04

CPC分类号： H03F1/30 ,  H03F3/189

摘要： A combined bias circuit in which a voltage drive bias circuit and a current drive bias circuit are provided in parallel with each other has a configuration in which a linearizer including a first resistor is connected between an amplifying transistor and a second resistor. This configuration ensures that even when a low voltage of 2.4 to 2.5 V is supplied as an external reference voltage, the amplifying operation can be performed while generally constantly maintaining an idling current in a temperature range from a low temperature to a high temperature, and that degradation in distortion characteristics during low-temperature operation can be limited.

摘要翻译： 其中电压驱动偏置电路和电流驱动偏置电路彼此并联提供的组合偏置电路具有其中包括第一电阻器的线性化电路连接在放大晶体管和第二电阻器之间的配置。 这种结构确保即使当提供2.4至2.5V的低电压作为外部参考电压时，可以执行放大操作，同时通常在从低温到高温的温度范围内恒定地保持空转电流，并且该 可以限制低温运转时的失真特性的劣化。

公开(公告)号：US5878331A

公开(公告)日：1999-03-02

申请号：US689085

申请日：1996-07-30

申请人： Kazuya Yamamoto ,  Kosei Maemura

发明人： Kazuya Yamamoto ,  Kosei Maemura

IPC分类号： H03K17/693 ,  H04B1/44 ,  H04B1/48 ,  H03G3/30 ,  H04L5/14

CPC分类号： H03K17/693 ,  H04B1/48

摘要： An integrated circuit includes a single pole double throw switch including a transmitting and receiving port, a transmitting port, and a receiving port. A transmission switch is coupled between the transmitting port and the transmitting and receiving port. A reception switch is coupled between the receiving port and the transmitting and receiving port. The reception switch includes a field effect transistor having a gate, a drain and a source. A voltage generating circuit receives first and second power supply voltages. The first power supply voltage is greater than the second power supply voltage. The voltage generating circuit generates a third voltage lower than the second power supply voltage and applies the third voltage to the gate of the field effect transistor of the reception switch during transmission. As a result, the magnitude of the voltage difference between the gate and the source or the gate and the drain of the second field effect transistor is greater than the magnitude of the difference between the first and second power supply voltages. Accordingly, because of the increased electrical separation between the terminals of the field effect transistor, leakage current flowing to the receiving port during transmission is reduced.

摘要翻译： 集成电路包括具有发送和接收端口，发送端口和接收端口的单极双掷开关。 发送开关耦合在发送端口和发送和接收端口之间。 接收开关耦合在接收端口和发送和接收端口之间。 接收开关包括具有栅极，漏极和源极的场效应晶体管。 电压产生电路接收第一和第二电源电压。 第一电源电压大于第二电源电压。 电压产生电路产生比第二电源电压低的第三电压，并且在传输期间将第三电压施加到接收开关的场效应晶体管的栅极。 结果，栅极和源极之间的电压差或第二场效应晶体管的栅极和漏极的大小大于第一和第二电源电压之间的差值的大小。 因此，由于场效应晶体管的端子之间的电隔离增加，传输期间流向接收端口的漏电流减小。

公开(公告)号：US09007605B2

公开(公告)日：2015-04-14

申请号：US13473804

申请日：2012-05-17

申请人： Kazuya Yamamoto

发明人： Kazuya Yamamoto

IPC分类号： G06F3/12 ,  H04N1/00 ,  G06F15/00

CPC分类号： H04N1/00952 ,  H04N1/00236 ,  H04N1/00896 ,  H04N2201/0094

摘要： An image formation apparatus includes an image reading control unit and a print control unit. The print control unit includes: a first communication control unit connected to the image reading control unit; and a power supply control unit configured to control power supply to the image reading control unit. The image reading control unit includes: a second communication control unit connected to the first communication control unit. When completing a process to transition to a power save mode in accordance with an instruction from the print control unit, the image reading control unit cuts off the communications through the second communication control unit. After sending the image reading control unit the instruction to transition to the power save mode, the print control unit detects the cutoff of the communications and then cuts off the power supply to the image reading control unit through the power supply control unit.

摘要翻译： 图像形成装置包括图像读取控制单元和打印控制单元。 打印控制单元包括：连接到图像读取控制单元的第一通信控制单元; 以及电源控制单元，被配置为控制对所述图像读取控制单元的电力供应。 图像读取控制单元包括：连接到第一通信控制单元的第二通信控制单元。 当完成根据来自打印控制单元的指令转换到省电模式的处理时，图像读取控制单元通过第二通信控制单元切断通信。 在将图像读取控制单元发送到转换到省电模式的指令之后，打印控制单元检测通信的截止，然后通过电源控制单元切断对图像读取控制单元的电源。

公开(公告)号：US08945791B2

公开(公告)日：2015-02-03

申请号：US13636606

申请日：2011-03-23

申请人： Koichiro Asazawa ,  Koji Yamada ,  Hirohisa Tanaka ,  Kazuya Yamamoto ,  Tim Olson ,  Svitlana Pylypenko ,  Plamen Atanassov

发明人： Koichiro Asazawa ,  Koji Yamada ,  Hirohisa Tanaka ,  Kazuya Yamamoto ,  Tim Olson ,  Svitlana Pylypenko ,  Plamen Atanassov

IPC分类号： H01M8/10 ,  H01M4/90 ,  H01M4/88 ,  H01M4/86

CPC分类号： H01M4/8605 ,  H01M4/8828 ,  H01M4/9008 ,  H01M4/9083 ,  H01M8/1011 ,  H01M2004/8689 ,  H01M2250/20 ,  Y02E60/523 ,  Y02T90/32

摘要： In a fuel cell including an electrolyte layer allowing an anion component to migrate, and a fuel-side electrode and an oxygen-side electrode arranged to face each other while sandwiching the electrolyte layer, the oxygen-side electrode contains a first catalyst containing a first transition metal and polypyrrole, and a second catalyst containing a second transition metal and a porphyrin ring-containing compound so that the mixing ratio of the first catalyst relative to 100 parts by mass of the total amount of the first catalyst and the second catalyst is more than 10 parts by mass, and below 90 parts by mass.

摘要翻译： 在包含允许阴离子成分迁移的电解质层的燃料电池中，并且在夹着电解质层的同时配置为彼此面对的燃料侧电极和氧气侧电极，所述氧气侧电极含有含有第一催化剂的第一催化剂， 过渡金属和聚吡咯，以及含有第二过渡金属和含卟啉环的化合物的第二催化剂，使得第一催化剂与第一催化剂和第二催化剂的总量相对于100质量份的混合比更多 10质量份以下，90质量份以下。

公开(公告)号：US08870176B2

公开(公告)日：2014-10-28

申请号：US13371717

申请日：2012-02-13

申请人： Kazuya Yamamoto

发明人： Kazuya Yamamoto

IPC分类号： B65H37/04 ,  G03G15/00 ,  B42C1/12 ,  B42B4/00

CPC分类号： B42C1/12 ,  B42B4/00 ,  B42C1/125 ,  B42C13/006 ,  B42C19/02 ,  B65H37/04 ,  B65H2301/4223 ,  B65H2405/22 ,  B65H2408/1222 ,  B65H2801/27 ,  G03G15/6544

摘要： A sheet processing apparatus includes: a stacking unit that stacks conveyed sheets; an aligning unit that aligns the sheets stacked on the stacking unit in a sheet conveying direction; a binding unit that moves along an end portion of a bundle of the sheets on a binding portion side and performs a binding process for the bundle of the sheets that have been aligned by the aligning unit; a pressing unit that presses the bundle of the sheets at the end portion thereof on the binding portion side; and an interlocking unit that moves the pressing unit in association with a motion of the binding unit.

摘要翻译： 片材处理设备包括：堆叠所输送的片材的堆叠单元; 对准单元，其在片材输送方向上对齐堆叠单元上的片材; 捆绑单元，其沿着捆绑部分侧的纸张束的端部移动，并且对已经对准的对齐单元的纸张束执行装订处理; 按压单元，其在所述装订部分侧的端部处挤压所述片材束; 以及联锁单元，其与所述装订单元的运动相关联地移动所述按压单元。

公开(公告)号：US08558549B2

公开(公告)日：2013-10-15

申请号：US12941134

申请日：2010-11-08

申请人： Kazuya Yamamoto ,  Tomoyuki Asada ,  Miyo Miyashita

发明人： Kazuya Yamamoto ,  Tomoyuki Asada ,  Miyo Miyashita

IPC分类号： G01R31/00 ,  G01R25/02

CPC分类号： G01R31/2822 ,  G01R23/20 ,  H03F3/24 ,  H04B1/0475 ,  H04B17/103

摘要： A detector circuit for detecting degradation in the distortion characteristics of a power amplifier based on signals from both ends of a coupled line of a directional coupler. The detector circuit includes a phase shifter/attenuator for phase shifting and attenuating a signal from a coupled terminal of the coupled line, a differential amplifier for outputting difference between an output signal from the phase shifter/attenuator and a signal from the isolated terminal of the coupled line, a wave detector circuit for converting the difference into a DC signal, and a comparing circuit for determining whether the voltage level of the DC signal exceeds a predetermined level. When degradation in the distortion characteristics of the power amplifier arises, the phase shifter/attenuator phase shifts the signal from the coupled terminal and outputs a signal 180° out of phase with the signal from the isolated terminal.

摘要翻译： 一种用于根据来自定向耦合器的耦合线的两端的信号来检测功率放大器的失真特性的劣化的检测器电路。 检测器电路包括用于相移和衰减来自耦合线的耦合端的信号的移相器/衰减器，用于输出来自移相器/衰减器的输出信号与来自该移相器/衰减器的隔离端的信号的差分放大器 耦合线，用于将差值转换为DC信号的波检测器电路，以及用于确定DC信号的电压电平是否超过预定电平的比较电路。 当功率放大器的失真特性出现降低时，移相器/衰减器将来自耦合端子的信号相移，并输出与隔离端子信号180°异相的信号。

公开(公告)号：US08432227B2

公开(公告)日：2013-04-30

申请号：US13301955

申请日：2011-11-22

申请人： Atsushi Okamura ,  Kazuya Yamamoto ,  Takayuki Matsuzuka

发明人： Atsushi Okamura ,  Kazuya Yamamoto ,  Takayuki Matsuzuka

IPC分类号： H03F3/04

CPC分类号： H03F3/211 ,  H03F1/0261 ,  H03F1/301 ,  H03F1/302 ,  H03F1/32 ,  H03F2200/18 ,  H03F2200/405 ,  H03F2200/93

摘要： A power amplifier includes: an amplifying element having a base into which input signals are inputted, a collector to which a collector voltage is applied, and an emitter; and a bias circuit supplying a bias current to the base of the amplifying element. The bias circuit includes a bias current lowering circuit which lowers the bias current when the collector voltage is lower than a prescribed threshold value.

摘要翻译： 功率放大器包括：具有输入信号的基极的放大元件，施加集电极电压的集电极和发射极; 以及向放大元件的基极提供偏置电流的偏置电路。 偏置电路包括偏置电流降低电路，当集电极电压低于规定的阈值时，降低偏置电流。