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

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

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.

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

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

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。