| 释义 |
NAND Computers.|nænd|
[f. n(ot) and.]
A Boolean function of two or more variables that has the value zero when all of them are unity, and is otherwise unity; ‘not..and..’. Usu. attrib.
1958IRE Trans. Electronic Computers VII. 181/3 Using a positive logic (+ is identified with true and ONE) the circuit represents the binary NOR function, A1 + A2 = B . A negative logic (- is identified with true and ONE) results in the binary NAND function, A1·A2 = B . 1960N. R. Scott Analog & Digital Computer Technol. x. 392 Of course, A{vb}B = A·B ; so this circuit is sometimes called a not and (or nand) circuit. 1966Electronics 31 Oct. 42 The circuits used..are transistor-transistor NAND logic. 1971J. H. Smith Digital Logic iv. 48 Due to practical manufacturing reasons the NAND configuration forms the basis of the majority of integrated circuit systems. Ibid., The action of the NAND is that it gives a 0 output when all its inputs are 1 signals. |