| functional unit that generates the value of its output variable by extracting the root of the value of its input variable and multiplying the square root by a constant weighting factor according to the formula|
|t||is the time;|
|u(t)||is the input variable;|
|K||is the weighting factor;|
|v(t)||is the output variable.|
Note 1 to entry: This entry was numbered 351-32-20 in IEC 60050-351:2006.