发明名称 |
Hall-effect current clamp |
摘要 |
A Hall-effect current clamp, in which the constant-current generator (13) supplying the Hall-effect cell (8) comprises an operational amplifier (15) which has an internal-voltage reference (17) and which pilots a transistor (Q1) mounted in emitter follower in series with the cell (8), such that the current which traverses it is on the order of 1 mA. At the output of the measurement amplifier (14) of the clamp, a dividing bridge (P1,R5) whose intermediate lead is connected to the inverting (-) input of the amplifier (14) permits obtaining a supplementary amplification of the output signal of the clamp at the price of a low current consumption. Thus, the total current consumption of the clamp is maintained at a very low level, thereby providing a considerable increase in the life span of the batteries (9) used to supply the clamp.
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申请公布号 |
US4704575(A) |
申请公布日期 |
1987.11.03 |
申请号 |
US19860850529 |
申请日期 |
1986.04.11 |
申请人 |
SOCIETE CHAUVIN ARNOUX |
发明人 |
ARNOUX, DANIEL;GENTER, CLAUDE;ANTON, CHRISTIAN;NASCIMBEN, ERIC |
分类号 |
H01L43/14;G01R1/22;G01R15/20;H01L43/04;(IPC1-7):G01R19/00 |
主分类号 |
H01L43/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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