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公开(公告)号：EP1528668A2
公开(公告)日：2005-05-04
申请号：EP04022665.6
申请日：2004-09-23
发明人： Nakatani, Toshifumi , Itoh, Jyunji , Nakano, Hideo
CPC分类号： H03F1/22 , H03F1/34 , H03F3/19 , H03F3/45089 , H03F2200/144 , H03F2200/372 , H03F2200/492 , H03F2203/45256 , H03F2203/45464
摘要： An amplifier circuit (10) amplifies a signal inputted from an input terminal (P1). A first feedback circuit (20) is placed across an emitter of a bipolar transistor (101) and an input of the amplifier circuit (10). A second feedback circuit (30) is placed across the input and an output of the amplifier circuit (10) for feeding the output of the amplifier circuit (10) back to the input. A phase change amount in the feedback circuit is determined by the values of an inductor and a capacitor. The values of these elements are selected so that a phase of a signal in which fundamental waves included in two feedback signals are combined and a phase of a signal in which second harmonics included in the two feedback signals are combined are shifted by approximately 180 degrees from a phase of a fundamental wave of an input signal.
摘要翻译： 放大器电路（10）放大从输入端子（P1）输入的信号。 第一反馈电路（20）放置在双极晶体管（101）的发射极和放大器电路（10）的输入两端。 第二反馈电路（30）放置在放大器电路（10）的输入端和输出端之间，用于将放大器电路（10）的输出端馈送回输入端。 反馈电路中的相位变化量由电感器和电容器的值确定。 选择这些元件的值，使得组合两个反馈信号中包括的基波的信号的相位和组合包括在这两个反馈信号中的第二谐波的信号的相位相差约180度 输入信号的基波的相位。
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2.发明公开
公开(公告)号：EP1300944A3
公开(公告)日：2007-01-24
申请号：EP02022304.6
申请日：2002-10-07
发明人： Naktani, Toshifumi , Itoh, Jyunji , Nakano, Hideo
IPC分类号： H03G3/30
CPC分类号： H03G1/0088
摘要： A variable gain amplifying apparatus has
an amplifier;
one or more first switching elements connected inparallel to the amplifier; and
a phase shifter connected in series to the first switching element,
wherein the first switching element is enabled if the level of an input signal or an output signal is higher than a predetermined level, and the first switching element is disabled if the level of the input signal or the output signal is equal to or lower than the predetermined level,
the amplifier does not operate when the first switching element is enabled, and the amplifier operates when the first switching element is disabled, and
the amount of phase shift when the input signal is passed through the amplifier and phase shifter is substantially equal to the amount of phase shift when the input signal is passed through the first switching element.-
3.发明公开Low-noise differential bias circuit and differential signal processing apparatus 审中-公开Ra en en en en en en en en en en en en en en en en en en en en en en en en
公开(公告)号：EP1557949A1
公开(公告)日：2005-07-27
申请号：EP05001123.8
申请日：2005-01-20
CPC分类号： H03K3/2823 , H03F1/3211 , H03F1/3276 , H03F2200/372 , H03K3/013
摘要： A low-noise differential bias circuit is provided which obtains excellent noise characteristics while ensuring excellent distortion characteristics. A collector of a transistor (Q11) is connected to a voltage supply point (Vcc) via a resistor R15. Abase of the transistor (Q11) is connected to a base of a transistor (Q1) via resistors (R13, R11) connected in series. A connection point between the resistors (R11, R13) is connected to the collector of the transistor (Q11). A collector of a transistor (Q12) is connected to the voltage supply point at connection point A via a resistor (R16). A base of the transistor (Q12) is connected to a base of a transistor (Q2) via resistors (R14, R12) connected in series. A connection point between the resistors (R12, R14) is connected to the collector of the transistor (Q12). By this configuration, a high frequency ground is performed at the connection point A.
摘要翻译： 提供低噪声差分偏置电路，其获得优异的噪声特性，同时确保优异的失真特性。 晶体管（Q11）的集电极通过电阻R15连接到电压供应点（Vcc）。 晶体管（Q11）的衰减通过串联连接的电阻（R13，R11）连接到晶体管（Q1）的基极。 电阻器（R11，R13）之间的连接点连接到晶体管（Q11）的集电极。 晶体管（Q12）的集电极通过电阻（R16）连接到连接点A处的电压供应点。 晶体管（Q12）的基极通过串联连接的电阻（R14，R12）连接到晶体管（Q2）的基极。 电阻器（R12，R14）之间的连接点连接到晶体管（Q12）的集电极。 通过这种配置，在连接点A处执行高频接地
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公开(公告)号：EP0742640B1
公开(公告)日：2001-07-04
申请号：EP96105708.0
申请日：1996-04-11
发明人： Nakatsuka, Tadayoshi , Itoh, Jyunji
IPC分类号： H03D7/12
CPC分类号： H03D7/125
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公开(公告)号：EP0742640A1
公开(公告)日：1996-11-13
申请号：EP96105708.0
申请日：1996-04-11
发明人： Nakatsuka, Tadayoshi , Itoh, Jyunji
IPC分类号： H03D7/12
CPC分类号： H03D7/125
摘要： A front-end circuit (1000) receives a R.F. input signal and a local oscillation signal, and outputs a multiplication signal includes: a first amplifier (160) having an input terminal (144), a power supply terminal (141) and a virtual ground (142); a second amplifier (161) having an input terminal (145), a power supply terminal (143) and a ground; and a mixer (162) having a first and a second input terminals, a power supply terminal (146) and a virtual ground (140). In the front-end circuit (1000), the virtual ground (140) of the mixer (162) is dc-coupled to the power supply terminal (141) of the first amplifier (160), the virtual ground (142) of the first amplifier (160) is dc-coupled to the power supply terminal (143) of the second amplifier (161), the power supply terminals (141,143) of the first amplifier (160) and the second amplifier (161) are ac-coupled to the first and the second input terminals of the mixer, respectively. The input terminal (144) of the first amplifier (160) and the input terminal (145) of the second amplifier (161) receive the local oscillation and the R.F. input signals, respectively. A power supply voltage is supplied to the power supply terminal (146) of the mixer (162) and the ground.
摘要翻译： 前端电路（1000）接收R.F. 输入信号和本地振荡信号，并且输出乘法信号，包括：具有输入端子（144）的第一放大器（160），电源端子（141）和虚拟接地端子（142）; 具有输入端子（145），电源端子（143）和接地的第二放大器（161） 以及具有第一和第二输入端的混合器（162），电源端子（146）和虚拟接地（140）。 在前端电路（1000）中，混频器（162）的虚拟接地（140）被直流耦合到第一放大器（160）的电源端子（141），虚拟接地端（142） 第一放大器（160）直流耦合到第二放大器（161）的电源端子（143），第一放大器（160）和第二放大器（161）的电源端子（141,143）被交流耦合 分别连接到混频器的第一和第二输入端。 第一放大器（160）的输入端（144）和第二放大器（161）的输入端（145）接收本地振荡和R.F. 输入信号。 电源电压被提供给混合器（162）的电源端子（146）和接地。
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公开(公告)号：EP1528668A3
公开(公告)日：2005-06-08
申请号：EP04022665.6
申请日：2004-09-23
发明人： Nakatani, Toshifumi , Itoh, Jyunji , Nakano, Hideo
CPC分类号： H03F1/22 , H03F1/34 , H03F3/19 , H03F3/45089 , H03F2200/144 , H03F2200/372 , H03F2200/492 , H03F2203/45256 , H03F2203/45464
摘要： An amplifier circuit (10) amplifies a signal inputted from an input terminal (P1). A first feedback circuit (20) is placed across an emitter of a bipolar transistor (101) and an input of the amplifier circuit (10). A second feedback circuit (30) is placed across the input and an output of the amplifier circuit (10) for feeding the output of the amplifier circuit (10) back to the input. A phase change amount in the feedback circuit is determined by the values of an inductor and a capacitor. The values of these elements are selected so that a phase of a signal in which fundamental waves included in two feedback signals are combined and a phase of a signal in which second harmonics included in the two feedback signals are combined are shifted by approximately 180 degrees from a phase of a fundamental wave of an input signal.
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7.发明公开
公开(公告)号：EP1300944A2
公开(公告)日：2003-04-09
申请号：EP02022304.6
申请日：2002-10-07
发明人： Naktani, Toshifumi , Itoh, Jyunji , Nakano, Hideo
IPC分类号： H03G3/30
CPC分类号： H03G1/0088
摘要： A variable gain amplifying apparatus has
an amplifier;
one or more first switching elements connected inparallel to the amplifier; and
a phase shifter connected in series to the first switching element,
wherein the first switching element is enabled if the level of an input signal or an output signal is higher than a predetermined level, and the first switching element is disabled if the level of the input signal or the output signal is equal to or lower than the predetermined level,
the amplifier does not operate when the first switching element is enabled, and the amplifier operates when the first switching element is disabled, and
the amount of phase shift when the input signal is passed through the amplifier and phase shifter is substantially equal to the amount of phase shift when the input signal is passed through the first switching element.摘要翻译： 一种可变增益放大装置具有放大器€ƒ€ƒ€ƒ; €ƒ€ƒ€ƒ一个或连接inparallel到放大器多个第一开关元件; 和€ƒ€ƒ€ƒ串联连接到第一开关元件的移相器，€ƒ€ƒ€ƒworin所述第一开关元件被使能，如果输入信号的或输出信号的电平比预定电平高， 和所述第一开关元件被禁用如果输入信号或输出信号的电平比预定电平以下的情况下，€ƒ€ƒ€ƒ放大器不工作时被使能第一开关元件，和所述放大器 操作当第一开关元件被禁用，并且€ƒ€ƒ€ƒ当输入信号通过所传递的当输入信号通过放大器和移相器通过相移量基本上等于相移量 第一开关元件。
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