| functional unit that generates its output variable as a function of its input variable according to a defined, time-invariant mathematical function where
| t | is the time; |
| u(t) | is the input variable; |
| f | is the function; |
| v(t) | is the output variable. |
Note 1 to entry: This entry was numbered 351-32-19 in IEC 60050-351:2006.
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