Differenssimittaus

Differenssimittaus, often translated as differential measurement, is a technique used to determine the difference between two quantities or signals. This method is particularly useful in applications where the absolute value of a signal is less important than its variation or comparison to another signal. In essence, it involves subtracting one measurement from another.

The primary advantage of differenssimittaus is its ability to reject common-mode noise. Common-mode noise is interference that affects both signals being measured equally. By taking the difference, this shared noise is canceled out, leading to a cleaner and more accurate measurement of the actual difference between the signals. This technique is widely employed in electronic circuits, particularly in operational amplifiers where the difference between the input signals is amplified.

Other applications of differenssimittaus include strain gauges, where the difference in resistance between two active elements is measured to detect deformation. It is also found in pressure sensors, thermocouples, and in signal processing to isolate specific components of a signal. The simplicity and effectiveness of differenssimittaus make it a fundamental concept in various scientific and engineering disciplines.