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Multiple range current measurement system with low power dissipation, fast settling time, and low common mode voltage error
Multiple range current measurement system with low power dissipation, fast settling time, and low common mode voltage error
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机译:低功耗,快速建立时间和低共模电压误差的多量程电流测量系统
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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.
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