发明授权
- 专利标题： Multiple range current measurement system with low power dissipation, fast setting time, and low common mode voltage error
- 专利标题（中）： 多范围电流测量系统，功耗低，设置时间短，共模电压低
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申请号： US09912351申请日： 2001-07-26
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公开(公告)号： US06603301B2公开(公告)日： 2003-08-05
- 发明人: Michael J. Benes
- 申请人： Michael J. Benes
- 主分类号： G01R1508
- IPC分类号： G01R1508
摘要：
A multi-range measuring circuit for measuring a flow of electrical current between a first node and a second node. A measurement resistor is connected to the first node to develop a voltage having a high range output. A summing node connected in series with the measurement resistor acts as an input to an amplifier for developing a second voltage having a low range output having a higher scale factor than the high range output. If the capacity of the amplifier to maintain the low range as a linear function is exceeded, a bypass circuit bypasses excess current flow to the second node.