| 摘要 |
<p>The invention relates to a logic circuit having a plurality (N) inputs, the amount of which is at least three (N >/=3), said inputs being adapted to be supplied with binary input signals, and having an output supplying a binary output signal, the value of which equals the majority of the values of the input signals. The mentioned prior art system has, particularly in case of fail-safe circuits, of which an extreme reliability is required, the disadvantage that the voting-mechanism is present only in a single fashion, and therefore is a potentially vulnerable part in a total safe-guarding-chain. The invention now proposes to provide a logic circuit of the type mentioned in the preamble with a number (N) and AND-gates, the number (N) corresponding to the number (N) of inputs, of the magnetic type, each having a magnetizable element, e.g. a ring core, a first input connected with a writing winding cooperating with said element, a second input connected with a reading winding cooperating with said element, and an output connected with a detection-winding cooperating with said element, said inputs of the AND-gates being connected with a corresponding input of the circuit, in which the first input of an AND-gate (1, 2 ..., N-1, 1) is connected with the second input of the next AND-gate (2, 3 ..., N, 1), and the outputs of all AND-gates being connected with the output of the circuit.</p> |
