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What’s The Difference Between High-Side And Low-Side Current Sensing? (.PDF Download)

The most common method for measuring currents in electronic circuits is to place low-value sense resistors in series with the load and measure the voltage drop across them. These voltage drops are very low, so their outputs are applied to precision instrumentation amplifiers with high input impedances. The high impedance minimizes loading on the sense resistor, and the instrumentation amplifiers are

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