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Power consumption characteristics always include noise components. The external noise can be reduced by proper design of the signal acquisition path and careful use of the measurement equipment. Measuring the power consumption on the resistor in the ground line has some advantages. Firstly, it reduces the noise level and, secondly, it allows us to measure the signal directly with an oscilloscope probe, because most probes have their common line permanently connected to the main power ground. To increase the signal-to-noise ratio further, the number of averaged samples can be increased.