| 摘要 |
1,111,353. Circuits employing bi-stable magrietic elements. SIEMENS A.G. 21 June, 1966 [22 June, 1965], No. 27571/66. Heading H3B. Pairs of column or row conductors of a random access storage matrix are connected together in parallel. In a multi-planar matrix the row conductor pairs of adjacent planes are connected in series (Fig. 2) and corresponding column conductors in each plane are connected to a common source. Magnetic cores in the rows of a pair are differently orientated so that, for a particular direction of current flow in a column conductor and a pair of row conductors, the fluxes induced add in one core but not in the other. In this arrangement the particular core is selected by choice of the direction of the row current, whereas in Fig. 1 (not shown), the column current is reversed to select the core. Switches S1 S2 determine whether a " 1 " or a " 0 " is stored. For read-out the column current is reversed and the appropriate row current is supplied. The signals induced on the lines of a pair of row conductors affect a transformer core differentially to generate an output on line L1, L2. In Fig. 3 (not shown), the column conductors are connected in pairs and the row conductors are not The first and third column conductors of a plane are connected, by way of diodes, to one transformer winding and the second and fourth to the other winding. In this case a single transformer suffices for each matrix plane. All the column conductors of a plane are also connected by way of rectifiers to a transistor switch. In Fig. 4 (not shown), the binary digit to be stored is determined by inhibit lines which thread cores in the first and third rows and in the second and fourth rows in a matrix plane of the type shown in Fig. 2. |
