SU622168A2 - Arrangement for information retrieval from magnetic core storage units - Google Patents

Description

one

The invention relates to computing and can be used in storage devices (memory) on magnetic cores with a 2.5-dimensional two-wire structure.

A device is known for the main author. St. 523451, containing bit buses whose ends of the same name are connected to the connection points of diodes connected in series between the record and read buses of the same name, a write key, a signal transformer with an output winding and an input winding, the midpoint of which is connected to the read key, and an additional input winding The midpoint of which is connected to the write key, and the ends through the resistors to the corresponding read and write buses.

In the known device, due to the mutual compensation of the capacitive interference signals in the signal transformer, the reliability of the information sampling device is significantly increased. However, in the information sampling cycle, in the presence of a bias discharge current in the selected bit bus and in the corresponding diodes, the amplitude of the interference signal on the read lines due to the shunting effect of the selected bit size decreases more than on the write buses. As a result, the asymmetry appearing in this case in the output winding of the signal transformer simultaneously with the useful signal of the readout, although relatively small

in magnitude, the uncompensated signal. With a large capacity (up to 10 bits) of memory blocks and a relatively small amplitude of the useful read signal, uncompensated interference can significantly reduce the signal-to-interference ratio and reliability of the information sampling, especially when sampling analog information from analog memory blocks. The purpose of the invention is to increase the reliability of sampling information by increasing the signal / interference ratio at the output of the device.

This goal is achieved by the fact that the device for retrieving information from memory blocks contains additional read keys, diodes connected in series between write and read buses of the same name, and a compensation bit bus whose ends are connected to the connection points of additional diodes connected in the opposite direction relative to corresponding diodes, and the middle point of the additional input winding of the transformer is connected through

additional key read from the input bus.

The drawing shows a schematic diagram of a device for retrieving information.

It contains information bit buses 1 with ferrite cores 2, compensating bit bus 3 with cores 4, diodes 5–8, connected in the same way for all information bit buses, diodes 9–12, connected in the opposite direction relative to other diodes, write bus , 13, 14 and reads 15, 16, resistors 17-20, a signal transformer 21 with the same input windings 22, 23 with a midpoint and an output winding 24, a read key 25, an additional read key 26 and a write key 27. Diodes 5-8 and 9, 11 are designed both to decipher the discharge currents and to switch readout signals.

A device for retrieving information in a non-destructive readout mode, in which readout signals in the form of high-frequency voltage or bipolar pulses are induced in all bit buses, works in the following way.

The read key 25 and the additional read key 26 are closed. The discharge currents of mixing the minimum value, the flow through the selected information, for example, 1, and compensating 3 discharge buses, open the diodes. Under the action of a numerical read current exciting the selected information and compensation cores, read signals are induced in the compensation and corresponding information bit buses. The compensation signal induced in bus 3 has a constant value, since all the cores of this bus

recorded “destroyed zero, and the signal on the selected information bus 1 depends on the information recorded in the selected core. A useful signal is allocated on the output winding of the signal transformer, which is proportional to the difference between the information and compensation read signals. Introduction to compensatory device

The bit winding, which in the data sampling cycle is connected to the write buses through open diodes simultaneously with the selected information bit winding connected to the read buses, equalizes the amplitudes and phases of the interference signals acting on both primary windings of the signal transformer, making the compensation of the interference signals more complete and increasing the signal-to-noise ratio.

Claims (1)

Invention Formula A device for retrieving information from memory blocks on magnetic cores by author. St. No. 523451, characterized in that, in order to increase the reliability of the device, it contains additional read key, diodes, sequentially included between the write and read buses of the same name, and a compensation bit bus whose ends are connected to the connection points of additional diodes connected in the opposite direction to the corresponding diodes, and the middle point of the additional input winding of the transformer is connected to the input bus through an additional read key. Information sources, taken into account during the examination 1. USSR Copyright Certificate No. 523451, cl. G NA 7/00, 1976.