SU1596389A1 - Address driver - Google Patents

Abstract

The invention relates to computing technology, in particular, to an addressing unit for information storage devices, and can be applied to redundant storage devices. The purpose of the invention is to reduce energy consumption and increase the reliability of the driver. The shaper contains the AND-1 elements 1 and 2, the majority element 3, the elements NOT 4. This goal is achieved by using the majority element 3, which provides the voltage difference necessary for programming the address decoders. This eliminates the need for increased power elements of the address shaper. 3 il.

Description

The invention relates to computing technology, in particular to addressing schemes for digital storage devices, and can be applied to redundant storage devices.

The purpose of the invention is to reduce energy consumption and increase the reliability of the driver.

FIG. 1 shows the structural scheme of the proposed shaper; in fig. 2 version of the electrical circuit of the majority element; in fig. 3 is a circuit of the address forger with one of the cells of the decoder.

Address shaper contains the elements, AND-NOT 1 and 2, the majority element 3, the elements are NOT 4.

The majority element 3 may consist, for example, of elements IL AND 5, element AND b, element HE 7. Elements AND 6 and HE 7 have control inputs through which their outputs are put into a state with high output impedance. These inputs are combined into the control input of the majority element, which is the input of the resolution of the programming of the driver.

The device is designed to generate address signals to the inputs of the main decoder 8 and the backup decoder of the memory chip. The backup descrambler consists of cells 9 containing fusible bridges 10, with which the backup descrambler is programmed, element 11, diodes 12.

In addition to the main function — the generation of address signals to the inputs of the decoders — the address driver generates the programming voltage of the backup descrambler necessary to burn out the jumpers 10.

The shaper works as follows.

In the programming mode of the backup descrambler, the voltage level of the log is supplied to the input of the programming software of the driver. 1. The anodes of the diodes 12 of the programmable cell 9 of the backup descrambler are supplied with an increased voltage level, which is used only when programming, which is necessary for burning through the jumpers 10.

Only one jumper 10 can be burned at a time, as the burning is performed by a large current. If we burn through several jumpers at once, the power supply bus of the microcircuit can burn out. Burning out the jumpers 10 of each cell 9 is performed sequentially. For definiteness, let us consider the operation of the device when burning the jumper 10, corresponding to the discharge Ai. In this case, to the address input A | served

logical signal corresponding to the value of the 1st bit, recorded in the cell 9 addresses. All other inputs, except i-ro, are signals inverse to the signal at input A |. At the same time at the inputs of the majority

element 3 is the most inverse of the signal Ai, so on its

the inverse output will be the signal Ai, and on

direct - Ai. As a result, the second entrances

elements and NOT 1 and 2, related to the 1st

the same information that was on their first inputs, i.e. In this section, the address driver misses information on its outputs to the corresponding address.

entrance. The second inputs of the elements AND-NOT 1 and 2 bits, except the 1st, from the outputs of the majority element 3 receives signals inverse to the signals at their first inputs, therefore at the outputs of all these elements

AND-NOT 1 and 2 set a high level log. one.

Since a high level is also applied to the anodes of diodes 12, jumpers 10, corresponding to bits, except for the 1st, are at this

programming stage is not burned through. In the iM bit, at one of the driver outputs, O is set, at the other 1, in accordance with the signal at input A. Jumper 10, to which O is fed from the output of the 1st bit of the driver, burns out, and jumper 10, to which 1 is fed, remains intact, which determines the value of the 1st bit of the address written in the cell 9 of the backup descrambler.

The address driver does not require an overvoltage of power for its operation, so the power it consumes is small. The reliability of the former is also increased, since

the likelihood of breakdown of the input transistors is reduced.

In the operating mode, the resolution input of the address shaper is given a signal O, through which both outputs of the majority element go to the state G or to the state with high output impedance regardless of the signals at its information inputs. As a result, the outputs of the address shaper for all

I will pass information from his inputs.

Claims (1)

Claims of the invention An address driver containing the first group AND-NOT elements, the first outputs of which are the address inputs of the driver, the AND-NOT elements of the second group, the outputs of which are the outputs of the driver, the elements NOT, whose inputs are connected to the first inputs of the corresponding AND elements the first group, the outputs of the elements are NOT connected to the first inputs of the corresponding elements AND-NOT of the second group, characterized in that, in order to reduce power consumption and increase the reliability of the driver, it contains majority pny element whose inputs are connected to the first inputs of the first-group AND-NOT elements, the control input of the majority element is the programming enable resolution of the former, and the direct and inverse outputs of the majority element are connected respectively to the second inputs of the AND-II elements of the second group 0 and to the second inputs of the elements NAND of the first group. FIG.