公开(公告)号：US5652545A

公开(公告)日：1997-07-29

申请号：US609788

申请日：1996-03-01

申请人： Miyo Miyashita ,  Masaaki Shimada ,  Kazuya Yamamoto

发明人： Miyo Miyashita ,  Masaaki Shimada ,  Kazuya Yamamoto

IPC分类号： H03K19/0952 ,  H03F1/08 ,  H03F1/42 ,  H03F1/48 ,  H03F3/26 ,  H03F3/45 ,  H03F3/50

CPC分类号： H03F3/45179 ,  H03F1/08 ,  H03F1/48 ,  H03F3/265 ,  H03F3/45183 ,  H03F3/505 ,  H03F2203/45656 ,  H03F2203/45702

摘要： A differential amplifier is connected to a push-pull-type source follower circuit that receives biphase signals. The source follower circuit has a first set of FETs including a first source follower FET and a first current source FET and a second set of FETs including a second source follower FET and a second current source FET. A first coupling capacitance element connects the first current source FET and the second source follower FET, and a second coupling capacitance element connects the second current source FET and the first source follower FET. A diode or a resistor connects the source terminals of the first and second current source FETs to a voltage source.

摘要翻译： 差分放大器连接到接收双相信号的推挽型源极跟随器电路。 源极跟随器电路具有包括第一源极跟随器FET和第一电流源FET的第一组FET，以及包括第二源极跟随器FET和第二电流源FET的第二组FET。 第一耦合电容元件连接第一电流源FET和第二源极跟随器FET，第二耦合电容元件连接第二电流源FET和第一源极跟随器FET。 二极管或电阻将第一和第二电流源FET的源极端子连接到电压源。

公开(公告)号：US06784720B2

公开(公告)日：2004-08-31

申请号：US10310183

申请日：2002-12-05

申请人： Miyo Miyashita ,  Kazuya Yamamoto ,  Masaaki Shimada

发明人： Miyo Miyashita ,  Kazuya Yamamoto ,  Masaaki Shimada

IPC分类号： H03K17687

CPC分类号： H03K17/08142 ,  H03K17/693

摘要： In a current switching circuit, a complementary circuit switches, in response to an input signal, a pair of current mirror circuits between a first state, enabling the first of the current mirror circuits, through a first current mirror current and disabling the second of the current mirror circuits, and a second state, disabling the first of the current mirror circuits and enabling the second of the current mirror circuits, through a second current, mirror current such that at least one of the first and second current mirror currents flows through a level shift circuit as a level shift current.

摘要翻译： 在电流切换电路中，互补电路响应于输入信号切换一对电流镜电路，该电流镜电路在第一状态之间通过第一电流反射镜电流使第一电流镜电路和第二电流镜电路失效 电流镜电路和第二状态，通过第二电流镜电流禁用第一电流镜电路并使得第二电流镜电路能够使得第二电流镜电流中的至少一个流过一个 电平移位电路作为电平移位电流。

公开(公告)号：US20090309655A1

公开(公告)日：2009-12-17

申请号：US12254069

申请日：2008-10-20

申请人： Kazuya Yamamoto ,  Miyo Miyashita

发明人： Kazuya Yamamoto ,  Miyo Miyashita

IPC分类号： H03F1/14 ,  H03F3/191

CPC分类号： H03F3/191 ,  H03F1/0261 ,  H03F3/72 ,  H03F2200/18 ,  H03F2200/408 ,  H03F2203/7239

摘要： A power amplifier includes: an amplifying transistor; a bias circuit; a first diode; a second diode; a matching attenuating circuit; a first current mirror circuit; a serial resonant circuit, and a switch. In an amplification mode, the bias circuit supplies a bias current to the amplifying transistor, and the first current mirror circuit turns off the first and second diodes, and the switch. In an attenuation mode, the bias circuit supplies no bias current to the amplifying transistor, and the first current mirror circuit turns on the first and second diodes, and the switch.

摘要翻译： 功率放大器包括：放大晶体管; 偏置电路; 第一个二极管; 第二个二极管; 匹配衰减电路; 第一电流镜电路; 串联谐振电路和开关。 在放大模式中，偏置电路向放大晶体管提供偏置电流，并且第一电流镜电路关断第一和第二二极管以及开关。 在衰减模式中，偏置电路不向放大晶体管提供偏置电流，并且第一电流镜电路导通第一和第二二极管以及开关。

公开(公告)号：US07616060B2

公开(公告)日：2009-11-10

申请号：US12131959

申请日：2008-06-03

申请人： Kazuya Yamamoto ,  Miyo Miyashita

发明人： Kazuya Yamamoto ,  Miyo Miyashita

IPC分类号： H03G3/00

CPC分类号： H03F3/191 ,  H03G1/0052

摘要： An amplifying transistor for amplifying a radio frequency signal between an input terminal and an output terminal. The cathode of a first diode is connected to the input terminal and the anode of a second diode is connected to the output terminal. A matching and attenuating circuit is connected between the anode of the first diode and the cathode of the second diode. A matching and attenuating circuit reduces impedance mismatches on the input terminal side and the output terminal side, and attenuates the radio frequency signal. In an amplification mode, a bias circuit supplies a bias current to an amplifying transistor and a current mirror circuit turns off the first and second diodes. In an attenuation mode, the bias circuit supplies no bias current to the amplifying transistor and the current mirror circuit turns on the first and second diodes.

摘要翻译： 一种放大晶体管，用于放大输入端和输出端之间的射频信号。 第一二极管的阴极连接到输入端子，第二二极管的阳极连接到输出端子。 匹配和衰减电路连接在第一二极管的阳极和第二二极管的阴极之间。 匹配和衰减电路减少输入端侧和输出端侧的阻抗失配，并衰减射频信号。 在放大模式中，偏置电路向放大晶体管提供偏置电流，并且电流镜电路关断第一和第二二极管。 在衰减模式中，偏置电路不向放大晶体管提供偏置电流，并且电流镜电路导通第一和第二二极管。

公开(公告)号：US07474170B2

公开(公告)日：2009-01-06

申请号：US11678643

申请日：2007-02-26

申请人： Kazuya Yamamoto ,  Miyo Miyashita

发明人： Kazuya Yamamoto ,  Miyo Miyashita

IPC分类号： H01P1/22

CPC分类号： H03F1/3276 ,  H03H7/253 ,  H03H11/24

摘要： A linearizer includes fifth diodes, a third resistor, sixth diodes, and a first npn heterojunction bipolar transistor. When a low-level voltage is applied to first and fourth control voltage terminals and a high-level voltage is applied to second and third control voltage terminals, a low-level voltage is applied to a fifth control voltage terminal, and when a high-level voltage is applied to the first and fourth control voltage terminals and a low-level voltage is applied to the second and third control voltage terminals, a high-level voltage is applied to the fifth control voltage terminal.

摘要翻译： 线性化器包括第五二极管，第三电阻器，第六二极管和第一npn异质结双极晶体管。 当对第一和第四控制电压端子施加低电平电压，并且向第二和第三控制电压端子施加高电平电压时，向第五控制电压端子施加低电平电压， 对第一和​​第四控制电压端子施加电平电压，并且向第二和第三控制电压端子施加低电平电压，向第五控制电压端子施加高电平电压。

公开(公告)号：US07474169B2

公开(公告)日：2009-01-06

申请号：US11553563

申请日：2006-10-27

申请人： Kazuya Yamamoto ,  Miyo Miyashita

发明人： Kazuya Yamamoto ,  Miyo Miyashita

IPC分类号： H01P1/22 ,  H03H7/24

CPC分类号： H03H7/253

摘要： An attenuator includes a first diode, a first control voltage terminal, a second diode, a first resistance, a second resistance, a third diode, a fourth diode, a fifth capacitance, a second control voltage terminal, a third control voltage terminal, a fourth control voltage terminal, and a linearizer provided between an input terminal and the anode of the first diode. The linearizer linearizes a signal input to the input terminal only when low level voltages are applied to the first and fourth control voltage terminals at the same time that high level voltages are applied to the second and third control voltage terminals.

摘要翻译： 衰减器包括第一二极管，第一控制电压端子，第二二极管，第一电阻，第二电阻，第三二极管，第四二极管，第五电容，第二控制电压端子，第三控制电压端子， 第四控制电压端子和设置在第一二极管的输入端子和阳极之间的线性化电路。 线性化器仅在将低电平电压施加到第一和第四控制电压端子的同时将高电平电压施加到第二和第三控制电压端子的同时，将输入到输入端子的信号线性化。

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：US20120062321A1

公开(公告)日：2012-03-15

申请号：US13079046

申请日：2011-04-04

申请人： Kazuya Yamamoto ,  Miyo Miyashita ,  Satoshi Suzuki ,  Takayuki Matsuzuka

发明人： Kazuya Yamamoto ,  Miyo Miyashita ,  Satoshi Suzuki ,  Takayuki Matsuzuka

IPC分类号： H03F3/20

CPC分类号： H03F3/195 ,  H03F1/0277 ,  H03F3/189 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/27 ,  H03F2200/411 ,  H03F2203/7206 ,  H03F2203/7236 ,  H03G1/0088

摘要： A power amplifier comprises: an amplifying transistor for amplifying an input signal; a reference voltage generating circuit which generates a reference voltage; a bias circuit generating a bias voltage based on the reference voltage and supplying the bias voltage to the amplifying transistor; and a booster elevating an enable voltage input from outside and outputting the enable voltage. The reference voltage generating circuit is turned ON/OFF in correspondence with an output voltage of the booster. The booster includes: an enable terminal to which the enable voltage is applied; a power source terminal connected to a power source; a transistor having a control electrode connected to the enable terminal, a first electrode connected to the power source terminal, and a second electrode that is grounded; and a FET resistor connected between the first electrode of the transistor and the power source terminal. A gate electrode of the FET resistor is open.

摘要翻译： 功率放大器包括：放大晶体管，用于放大输入信号; 产生参考电压的基准电压产生电路; 偏置电路，基于所述参考电压产生偏置电压，并将所述偏置电压提供给所述放大晶体管; 并且升压器提升从外部输入的使能电压并输出使能电压。 参考电压产生电路对应于升压器的输出电压而导通/截止。 升压器包括：施加使能电压的使能端子; 连接到电源的电源端子; 具有连接到使能端子的控制电极的晶体管，连接到电源端子的第一电极和接地的第二电极; 以及连接在晶体管的第一电极和电源端子之间的FET电阻器。 FET电阻的栅电极断开。

公开(公告)号：US07907032B2

公开(公告)日：2011-03-15

申请号：US12464919

申请日：2009-05-13

申请人： Kazuya Yamamoto ,  Miyo Miyashita

发明人： Kazuya Yamamoto ,  Miyo Miyashita

IPC分类号： H01P5/18 ,  H03H11/16

CPC分类号： H01P5/18

摘要： A directional coupler includes a main line connected at a first end to an input port and at a second end to an output port, a coupled line connected at a first end to a coupled port and at a second end to an isolated port, and a phase shifter connected at a first end to the isolated port and at a second end to the coupled port. The phase shifter phase shifts a second reflected wave component such that the second reflected wave component is opposite in phase to a first reflected wave component, the second reflected wave component traveling from the output port to the coupled port through the isolated port and the phase shifter, the first reflected wave component traveling from the output port to the coupled port through the coupled line.

摘要翻译： 定向耦合器包括在第一端连接到输入端口并且在第二端连接到输出端口的主线，在第一端处连接到耦合端口并且在第二端部处连接到隔离端口的耦合线，以及 移相器在第一端连接到隔离端口，在第二端连接到耦合端口。 移相器相移第二反射波分量，使得第二反射波分量与第一反射波分量相位相反，第二反射波分量通过隔离端口和相移器从输出端口传播到耦合端口 第一反射波分量从输出端口通过耦合线行进到耦合端口。

公开(公告)号：US07688133B2

公开(公告)日：2010-03-30

申请号：US12254069

申请日：2008-10-20

申请人： Kazuya Yamamoto ,  Miyo Miyashita

发明人： Kazuya Yamamoto ,  Miyo Miyashita

IPC分类号： H03F1/14

CPC分类号： H03F3/191 ,  H03F1/0261 ,  H03F3/72 ,  H03F2200/18 ,  H03F2200/408 ,  H03F2203/7239

摘要： A power amplifier includes: an amplifying transistor; a bias circuit; a first diode; a second diode; a matching attenuating circuit; a first current mirror circuit; a serial resonant circuit, and a switch. In an amplification mode, the bias circuit supplies a bias current to the amplifying transistor, and the first current mirror circuit turns off the first and second diodes, and the switch. In an attenuation mode, the bias circuit supplies no bias current to the amplifying transistor, and the first current mirror circuit turns on the first and second diodes and the switch.

摘要翻译： 功率放大器包括：放大晶体管; 偏置电路; 第一个二极管; 第二个二极管; 匹配衰减电路; 第一电流镜电路; 串联谐振电路和开关。 在放大模式中，偏置电路向放大晶体管提供偏置电流，并且第一电流镜电路关断第一和第二二极管以及开关。 在衰减模式中，偏置电路不向放大晶体管提供偏置电流，并且第一电流镜电路导通第一和第二二极管和开关。