FR1449734A - Permanent diode memory - Google Patents

Description

Permanent memory with diodes. Currently, some of the connections in the matrix assemblies of the diodes are manually soldered according to the instructions of a manufacturing manager.

The invention consists, on the contrary, in providing for the mass production of elements that are all similar and equipped with diodes on all the connections: so that an element can then correspond to a determined matrix program, it will suffice to destroy by one. any technical excess diodes, either mechanical or electrical; in this latter case in particular, the computer itself could carry out this destruction automatically when an interesting program has to be recorded industrially.

The production therefore consists in manufacturing blank K matrices which, in this case, will be matrices in which all connections are equipped with diodes; the destruction of the excess diodes can be done by passing a sufficient adequate current in the forward or reverse direction: it may also be necessary to provide the methods of manufacturing the dies (diameter of the wires, spacings, etc. .) in view of this possibility of a wise passage of abnormal current.

A variant of the invention consists in mounting systematically at each junction point of the matrix two head-to-tail diodes (instead of just one), this then results, for each junction point, in the possibility of displaying four different permanent states depending on the destruction carried out: 1 the two diodes destroyed by a sufficient alternating signal; 2 the positive passing diode destroyed by an adequate direct current; 3 the negative passing diode destroyed by an adequate direct current; 4 no diode destroyed.

The use of these possibilities increases the possibilities of such a matrix: they correspond in effect to benefiting from a ternary memory and from additional auxiliary information, for example. It can be noted that there is the possibility of manufacturing in micromodules and that the junctions could be made in series (by diffusion, for example). An advantage of these diode arrays is the high signal to noise ratio.

Reading will be done conventionally from currents in the form of AND or OR, or by reading in HF. We will obtain 1 A very weak noise signal when the two diodes are destroyed; 2 A positive alternation signal when the positive pass-through diode is used; 3 A negative alternation signal when using the negative pass-through diode; 4 An alternating signal reconstituted through the two intact diodes.

A variant in the destruction technique would consist of a simple direct mechanical destruction, assimilating to the holes which are made in a punched card (but here, the corresponding matrix is directly usable). This mechanical destruction could possibly take place by electronic bombardment.

Claims (1)

SUMMARY The invention consists in replacing the manufacture of matrices for programs, comprising diodes for certain connections by the systematized manufacture of matrices equipped with a diode at each junction and in a second step of destroying the diodes which are in excess. vis-à-vis a given program. In a variant, two head-to-tail diodes are mounted at each junction, which makes it possible to obtain a memory with 4 permanent stable states. According to the invention, the destruction of the excess diodes is liable to be purely mechanical but may also take place electrically by passing a suitably chosen direct or reverse destructive current: therefore the calculator itself would be capable of ordering this destruction in the appropriate way corresponding to a program.