公开(公告)号：US5783951A

公开(公告)日：1998-07-21

申请号：US728382

申请日：1996-10-09

申请人： Kinya Inoue ,  Akitoshi Watanabe ,  Mitsuharu Iwasaki ,  Mikio Matsumoto, deceased

发明人： Kinya Inoue ,  Akitoshi Watanabe ,  Mitsuharu Iwasaki ,  Mikio Matsumoto, deceased

IPC分类号： G01R29/24 ,  G01D5/24 ,  G01R19/00 ,  G06F3/041 ,  H03F3/45 ,  H03K17/96

CPC分类号： G01D5/2405 ,  G01D5/24 ,  G01R19/0092

摘要： Improved small current detector circuit and locator device each comprise a first and a second element in both of which a small current output occurs, a first and a second constant current generator circuit each generating a specified constant current, a first current mirror circuit which is supplied at the input with said output current occurring in said first element and said specified constant current generated from said first constant current generator circuit, and a second current mirror circuit which is supplied at the input with said output current occurring in said second element and said specified constant current generated from said second constant current generator circuit, and wherein either one of said first and second elements is disposed in a detecting portion and a current equal to the current from the output of either one of said first and second current mirror circuits is flowed to the output of the other current mirror circuit such that a detection output corresponding to the difference between said output currents from said first and second elements is drawn from said other current mirror circuit.

摘要翻译： 改进的小电流检测器电路和定位装置各自包括在其中发生小电流输出的第一和第二元件，每个产生指定恒定电流的第一和第二恒定电流发生器电路，提供的第一电流镜电路 在所述输入端处具有在所述第一元件中产生的所述输出电流和由所述第一恒定电流发生器电路产生的所述指定恒定电流;以及第二电流镜电路，其在所述输入端处被提供在所述第二元件中出现的所述输出电流， 从所述第二恒流发生器电路产生的恒定电流，并且其中所述第一和第二元件中的任一个设置在检测部分中，并且流过等于从所述第一和第二电流镜电路中的任一个的输出的电流的电流流动 到另一电流镜电路的输出，使得检测输出相应 g从所述第一和第二元件的所述输出电流之间的差被从所述另一电流镜电路中抽出。