SU523451A1 - Device for retrieving information from memory blocks on magnetic cores - Google Patents

Description

one

The invention relates to the field of computer technology and can be used in memory devices (memory) on magnetic cores with a 2.5-dimensional two-wire structure (2.5 D).

A device intended for sampling binary information in a 2.5-D storage device is known. A characteristic feature of this device is the presence of signal (balancing) transformers containing one or more mid-point input windings, the ends of which are directly or through decryption diodes connected to the ends bit tires. one

Of the known devices for sampling information, the closest to the technical essence is a device for retrieving information from memory blocks on magnetic cores, containing bits, whose ends of the same name are connected to the junction points of the diodes connected in series between the write and read lines of the same name, a write key, a signal transformer with output and input windings, the midpoint of which is connected to the Read key. 2

However, the use of the known device is difficult or impossible at all because of the magnitude of the sampling current that is unacceptably large for the above codebooks;

the values of the signal-to-noise ratio and the insufficient reliability of the information sampling, which in turn is explained by large variations in the inductance of the discharge busbars (since the magnitude of the reverse permeability of the cores can vary with changes in the residual induction in wide limits interference from unselected bit tires, which depends on

stored information.

The aim of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the device for retrieving information from memory blocks contains resistors and an additional input winding, the midpoint of which is connected to the write key, and the ends through resistors are connected to the corresponding read and write buses.

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

The device contains a bit bus 1 with cores 2, diodes 3-6, write bus 7, 8

and reads 9, 10, resistors 11-14, a signal transformer 15 with two input windings 16 and 17 with terminals from middle points and one output winding 18, keys for reading 19 and writing 20.

The device works as follows.

The discharge current of the Minimum value, the flow through both half of the selected bit bus (e.g., bus 1), opens diodes 5 and 6. Through open diodes 5 and 6, bus 9 and 10, as well as resistors 11 and 12, the useful read signal goes to the winding 16 of the signal transformer 15 and transformed into the output winding 18.

The read signals from the remaining (unselected) bit buses penetrate through their own capacitances of the closed diodes to the read buses 9, 10 and write 7, 8 as interference signals, which ino amplitude can exceed the useful signal. Under the influence of signals, the noise in the windings 17 and 18 in the ideal case (when all the diodes are the same and the amplitudes of the signals are equal) flow in the same magnitude, but acting in opposite directions, the interference currents, which cancel each other out, and on the output winding interference will be absent. As the experiment showed in a real device with a large number of bit buses, despite the variation in the parameters of the diodes and the amplitude of the read signals, the process of picking up the noise proceeds in a similar way. In this case, the signal-to-noise ratio at the output of the device increases many times.

/ 5 Respectively increases the reliability of the sample information.

Claims (2)

1. Auth. St. No. 377874, class G 11 C M / 02, 1973 2. US patent No. 3693176, cl. 340-174 publ. 1972 jr I. 5k / -I fi ten