摘要：表示MAX4172 IC替代通常用动圈式仪表分流电流放大器。该电路允许使用的动圈式仪表，甚至很大一部分是目前正在测量时计电流。Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS DIGITAL POTENTIOMETERS DISPLAY DRIVERS Keywords: moving-coil meter, high-side current amplifier, remote measurement, display drivers Jun 20, 2005 APPLICATION NOTE 3536 Moving-Coil Meter Measures Low-Level Currents Abstract: The MAX4172 IC substitutes a current amplifier for the shunt normally associated with a moving-coil meter. This circuit allows use of the moving-coil meter, even when the meter current is a large fraction of the current being measured. The display of choice for certain applications remains the large moving-coil meter. While a moving-coil meter may lack the accuracy of a digital panel meter, the perceived extra information derived from the needle's rate of change cannot be matched by the digital……