SU1141451A1 - Store data access driver - Google Patents

Abstract

1. DEVICE FOR SELECTING INFORMATION FROM THE DRIVE, containing the first and second groups of read and write current keys, the first group of sample elements, executed in the form of diodes, the anodes of one of which are connected to the outputs of the current reading keys of the first group, the cathodes of others - with the first inputs the second group current recording keys, other cathodes and anodes of other diodes are the first output of the device, the second group of sampling elements is filled with diodes, the cathodes of one of which are connected to the first inputs of the current reading keys of the second group s ,, D1 u5chih anodes. DIODES: - with the outputs of the current recording keys of the first group, the other anodes and cathodes of the diodes are the second output of the device, one of the anodes of the diodes is connected to the first terminals of the bias elements of the first group, the second terminals of which are connected to the zero potential bus, one of the cathodes of the diodes are connected with the first pins of the bias elements of the second; group, the second pins of which are soy: connected to the power bus, the first inputs of the current reading switches of the first group are connected to the first output of the first matching element, the second output of which is connected is not connected to the power bus; the first inputs of the current recording keys of the first group are connected to. The first terminal of the second matching element, the second terminal of which is connected to the power bus, the second inputs of the group reading current keys and the group recording current keys are the first and second pickups of the device, respectively, the third and fourth ko inputs of which are the first and second inputs of the current generator whose third input is connected to the power bus, and the fourth input is connected to a zero potential bus, characterized in that, in order to simplify and increase the reliability of the device, the first and second elements are shifted into it neither i. the first separating element, made in the form of the first JV diode, the anode of which is connected to the outputs of the current recording keys of the second group and to the first output of the second bias element, the second output of which is connected to the zero potential bus, the second separating element made in the form of the second diode whose anode is connected to the outputs of the current reading keys of the second group and the first output of the first element is offset, the second output of which is connected to the zero potential bus, the cathodes of the first and second

Description

The diodes are connected to the outputs of the current generator.

2. The device according to claim 1, characterized by Tei, that each key contains a transistor, a diode, a current-limiting resistor, a transformer, one output of the primary winding of which is connected to the first output of the current-limiting resistor, the second output of which is

141451

the second key input, another output of the transformer primary winding is connected to the diode anode, whose cathode is the control key input, the transformer secondary winding leads are connected to the base and emitter of the transistor, the collector of which is the first key input, and the key output emitter .

The invention relates to computing and can be used for current sampling in magnetic storage devices (1) on ferrite cores of large information capacity. A device is known that contains address lines, sampling diodes, a sampling key, damping resistors, bias resistors, a switch, a transistor, a resistor, a power bus, a zero potential bus 1. In this sampling device, one current generator (nonlinear current driver) is used for reading and writing, efficiently on a common base transistor, controller and key. Because of this, the number of sampling keys connected to the output of the current generator doubled, which doubled the parasitic capacitance of the load. An increase in this capacitance leads to a distortion of the current pulses, i.e. an increase in the duration of the front and a decrease in the duration of the current pulses at a given speed. All this leads to a decrease in the amplitude of the read signal and a change in the gating area, which ultimately limits the stability of the MZU intact. The closest technical solution to the invention is a device for selecting information from the accumulator containing the first group of diodes . The first anodes are connected to the outputs of the first reading current switches, and the first cathodes are connected to the first inputs of the second write current switches, the second cathodes and diodes of the first group of samples are connected to the first outputs of the device, the first cathodes of the second sample switches readings, and the first anodes are connected to the outputs of the first keys of the write current, the second anodes and cathodes of the sample diodes of the second group are connected to the second outputs of the device, the first anodes of the first and second sample diodes. the groups are connected to the first pins of the third bias resistors, the second pins of which are connected to the zero potential bus, the first cathodes of diodes of the first and second groups are connected to the first outputs of the fourth bias resistors, the second pins of which are connected to the power bus, the first inputs of the first keys the reading current is connected to the first output of the first matching resistor, the second output of which is connected to the power bus, the first inputs of the first write current switches are connected to the first output of the second matching resistor, the second the output of which is connected to the power bus, the second inputs of the first and second keys of the reading current and the first and second keys of the recording current are connected respectively to the first and second inputs of the device, the third and fourth inputs of which are connected respectively to the first and second inputs of the current generator, the third input of which connected to the power bus, and the fourth to the zero bus (C2U potential.

3

A disadvantage of the known sampling devices is that the device uses two current generators, one for reading and one for writing. All this leads to an increase in the equipment and a decrease in the reliability of the sampling device due to the presence of scatter of amplitude values of the read and write currents.

The purpose of the invention is to simplify and increase the reliability of the device.

The goal is achieved by the fact that in a device for retrieving information from a storage device containing the first and second groups of read and write current keys, the first group of sample elements made in the form of diodes, the anodes of one of which are connected to the outputs of the current reading keys of the first group, the cathodes of others - with the first inputs of the current recording keys of the second group. Other cathodes and anodes of other diodes are the first output of the device, the second group of sample elements made in the form of diodes, the cathodes of one of which are connected to the first inputs of the keys of the reading current of the second group, the anodes of the other diodes with the outputs of the current recording keys of the first group, the other anodes and the diodes' cathodes are the second output of the device, one of the diodes anodes is connected to the first terminals of the first group of bias elements, the second terminals of which are connected to the zero potential bus, one of the cathodes of the diodes are connected to the first water displacement elements of the second group, the second outputs of which are connected to the power bus, the first inputs of the current reading keys of the first group are connected to the first output of the first matching element, the second output of which is connected to the power bus, the first inputs of the current recording keys of the first group are connected to the first end of the second matching element The second terminal of which is connected to the power bus, the second inputs of the current reading keys of the groups and the current recording keys of the groups are respectively the first and second inputs of the device, the third and fourth in the turns of which are, respectively, the first and second inputs of the current generator, the third input of which is connected to the power bus, and the fourth input to

414514.

. bus zero potential, introduced the first and second elements of the displacement,. The first separation element, made in the form of a first diode, the anode 5 of which is connected to the outputs of the keys of the recording current of the second group and the first output of the second bias element, the second output of which is connected to the zero potential bus, the second 10 separation element, made in the form of a second diode, anode which is connected to the outputs of the current reading keys of the second group and to the first output of the first bias element, 15 the second output of which is connected to the zero potential bus, the cathodes of the first and second diodes are connected. torus current.

Each key contains a transistor, a 20 diode, a current limiting resistor, 1 transformer, one output of the primary winding of which is connected to the first output of the current limiting resistor, the second output of which is the second input of the switch, the other output of the primary winding of the transformer connecting the anode of the diode, the cathode of which is control the key input, the secondary terminals and the Q transformer are connected respectively to the base and the transistor, the collector of which is the first key input and the emitter is the key output.

FIG. 1 and 2 are schematic diagrams of the device and the current generator, respectively; FIG. 3 timing charts of the device.

I.

0 A device for retrieving information from a storage device (Fig. 1) contains. {The first group of sample elements, {for example, diodes 1, the first group of keys 2 reading current, the second group 5 of keys 3 reading current, the first group of keys 4 recording current, the second group; keys 5 write current generator 6 current |, bus 7 power bus 8 zero, its potential, the first matching element, for example, resistor 9, the second matching element, for example, resistor 10, the first bias element, made in the form of a resistor 11, the second element bias, made 5 in the form of a resistor 12, first and w rear separation elements made in the form of diodes 13 and 14, the first 15, the second 16, the third 17 and the fourth

18 inputs of the device, the first -19 and second 20 outputs of the device, the second group of sample elements, e.g. diodes 21, the first group of bias elements, e.g.

Each of the keys 2-5 contains a transistor 24, a transformer 25 with a primary 26 and a secondary 27 windings, a current limiting resistor 28, a diode 29, a control input 30.

The current generator 6 (FIG. 2) contains an OR-NOT 31 element, a resistor 32, an input transistor 33, two load resistors 34 and 35, a limiting diode 36, a key diode 37, a voltage regulator 38, a thermoelement 39, a resistor 40 zi, output stage 41, load resistor 42, output 43, and feedback input 44 of the voltage regulator.

The output stage 41 includes transistors 45 and 46 and resistors 47 and 48.

The device works as follows.

The device sets the read and write sampling currents in the selected drive address lines, which is the load of this device and in FIG. 1 not shown.

The address lines of the accumulator are connected by one end to the first output 19, and the other ends to the second output 20. The selection of a specific address line of the accumulator is carried out using two pairs of keys: the first pair of keys consisting of key 2 reading current and key 5 of recording current, and the second pair of keys consisting of the key 3 reading current and key 4 of the write current.

The selection of the current keys is carried out with the help of two logical desirators, which in FIG. 1 (in order to simplify it) are not shown. One logical decoder selects key 2 and key 5, and the second selects key 4 and key 3. Before generating read and write currents, the inputs 30 of the selected keys 2, 3 and key 4, 5 are set to a low level, i.e. the signal is logical. O. A positive polarity signal A is supplied to the input 15 (Fig. 3). In primary

winding 26 of the transformer 25, the selected keys 2 and 3 current flows, which ensures the inclusion of keys.

At the anode of the diode 14, a positive polarity is established, the magnitude of which is greater than the voltage at the output of the open current generator 6. It all creates. the condition for opening the diode 14 in the reading circuit.

A third positive signal is supplied to the third input 17, which in the current generator 6 turns off the transistor 33 and the diode 37 turns on. The voltage from the output 43 of the stabilizer, lysator 38 through the diode 37 is fed to the input of the output stage 41. At the same time, the output stage 41 opens and current flows in the load resistor. The voltage at the output of the open current generator 6 becomes less than the voltage at the anode of the diode 14 J

This condition contributes to the opening of the diode 14 and its full load is connected to the current generator 6. At the same time, the sampling current from the power supply bus 7 runs through a resistor 9, a switch 2, a diode 1, an address line, a diode 21, a switch 3, a diode 14 to the output of the current generator 6 and through the output stage 41 to the bus 8 of zero potential. In this case, the voltage on the anode of diode 13 is zero. Diode 13 will be under reverse bias, since the voltage at the output of the open generator 6 is significantly greater than zero. This is due to the fact that the output stage 41 of the generator 6 operates in the active mode and is a source of stable amplitude and duration of current pulses. Before forming the write current pulse, a positive polarity signal is applied to the second input 16, which includes the selected keys 4 and 5. A positive polarity voltage is established on the anode of diode 13, the magnitude of which is greater than the voltage on the code of the open current generator 6. All this creates a condition for opening the diode 13. Next, the fourth input 18 is supplied with a positive polarity signal D, which turns on the current generator 6. The current generator 6 generates a write current pulse in the address line. At the same time from the bus 7 power leaks

7

current c) 1 through resistor 10, switch 4, diode, 21, address line, diode 1, switch 5, diode 13 to the output of current generator 6 and through output stage 41 to bus 8 of zero potential. In this case, the diode 14 will be under reverse bias. In generator 6, the inclusion of the thermoelement 39 between the output 43 and the feedback input 44 of the voltage stabilizer 38 allows the output voltage of the stabilizer 38 to change, and after that 141451, 8

consequently, the amplitude of the sampling currents according to a certain law on temperature. This compensates for the temperature coefficient of the coercive force of 5 magnetic storage elements and thereby ensures the thermal stability of the amplitudes of the read signals.

The technical advantage of the proposed device over the Known is in its simplicity and increased reliability.

Tch

ha

Claims (2)

1. DEVICE FOR SELECTING 'INFORMATION FROM THE STORAGE, containing the first and second groups of keys of the read and write current,. the first group of sample elements made in the form of diodes, the anodes of one of which are connected to the outputs of the reading current keys of the first group, the cathodes of the other are connected to the first inputs of the recording current keys of the second group, other cathodes and anodes of other diodes are the first output of the device, the second group of sample elements Made in the form of diodes, the cathodes of one of which are connected to the first inputs of the reading current keys of the second group, the anodes of the other, diodes. - with the outputs of the recording current keys of the first group, _{s the} other anodes and cathodes of the diodes are the second output of the device, one of the diode anodes is connected to the first terminals of the bias elements of the first group, the second terminals of which are connected to the zero potential bus, one of the diode cathodes is connected with the first terminals of the bias elements of the second group, the second terminals of which are connected to the power bus, the first inputs of the reading current keys of the first group are connected to the first terminal of the first matching element, the second terminal of which is connected to the bus Nia, the first inputs of the write current of the first group of keys are connected to. the first output of the second matching element, the second output of which is connected to the power bus, the second inputs of the group read current keys and group write current keys are respectively the first and second inputs of the device, the third and fourth inputs of which are the first and second inputs of the current generator, the third input, respectively which is connected to the power bus, and the input is to the zero-tier bus, characterized in that, in order to simplify the reliability of the device, the first and second bias elements are introduced into it; chetverpotens I povyelement formed as a first diode, an anode of which is connected with rows vyho second write current key -SP group and with the first output of the second bias element .., the second output of which is connected to the bus of zero potential, the second dividing element, made in the form of a second diode, the anode of which is connected to the outputs of the keys of the read current of the second group and the first output of the first element bias, the second terminal of which is connected to the bus of zero potential, the cathodes of the first and second diodes are connected to the outputs of the current generator. 2. The device pop. 1, characterized in that each switch contains a transistor, a diode, a current-limiting resistor, a transformer, one terminal of the primary · winding of which is connected to the first terminal of the current-limiting resistor, the second terminal of which is the second input of the switch, the other terminal of the primary transformer is connected to the anode of the diode, wherein the cathode; th control input is a key transformer secondary winding terminals connected respectively to the base and ^{to the} emitter of the transistor, whose collector is pervm input key, and an emitter. Exit key.