SU955025A1 - Tuned device - Google Patents

Description

(54) CONFIGURABLE DEVICE

The invention relates to automation and computing technology and pre-. assigned to implement single-output and multi-output logic devices.

Known custom device that is implemented by setting the Boolean formulas specified in the basis S, v-j

U

The disadvantage of this device is that its configuration is carried out on the inputs, which limits the functionality with a fixed number of its external outputs.

The closest to the proposed is a configurable device, containing switching blocks, each of which contains two elements AND, the first inputs of the elements AND are combined and the corresponding information input of the device, the first input (output) of each switching unit is connected to the second input (output) of the next unit and is the corresponding input (output) of the device, the first input (output) of the first and second-input (output) of the last switching unit is the corresponding input (output dami) device 2,

A disadvantage of the known device is low speed.

The purpose of the invention is to increase speed.

The goal is achieved by the fact that the device contains a pulse generator, the output of which is connected to the second inputs of all elements AND of the device, the third input of the first element AND of each switching unit is connected to the output of the second element of the same block and is the first input (output) of the same unit, and the third input (output) of the second element AND of each switching unit is connected to the output of the first element AND of the same switching unit and is the second input (output) of the same switching unit.

20

In the drawing. Given the proposed device.

The device contains switching blocks 1, the elements And 2 and 3, the generator 4 pulses, the inputs (outputs) of the device 5-8, the information inputs 9-11 of the device.

The device works as follows.

Consider the operation of a device containing 30 three switching

block, when implementing the logical formula y () x,

To do this, you need variables x, Xj, x to submit respectively to the ninth, tenth and eleventh inputs of the device, connect the source of supply voltage to the input (output) 6, connect the inputs (outputs) 1 and 3 with a jumper, and remove the output signal from the entrance (exit) 8.

When a clock pulse from HI 4 is applied to the second inputs of all gates. And a signal is received, and as a result, their output signals during this period will depend only on the state of the remaining two inputs.

When the supply voltage is applied to point 6, a signal appears at the first input of the second element And 3 in the first block and at the first input of the first element And 2 in the second switching unit. The signals x and x2 arrive at the first inputs of the above elements.

Thus, on all three inputs of the second element And 3 of the first switch TeJtbHoro of the block when the signal x and / or the first element And 2 of the second switch block is applied when the signal x is turned on. single signals appear, as a result of which signals appear at the outputs of these elements.

The signal from the output of the second element And 3 of the first switching unit through the jumper, and the signal from the output of the first element And 2 of the second switching unit directly, arrive at the first input of the first element And 2 of the third initial unit.

When the last element x of the device 11 arrives at the second input, a device appears, which is fed to the input (output) 8.

Thus, for a signal to appear. On this input (output) it is necessary that one signal, x or x, and signal, x, be received, which corresponds to the required formula () x

When the signal from the GI disappears, all elements AND go to the state O.

The presence of the GI is necessary in order to ensure the correct operation of the device when the input signals disappear. Otherwise, by triggering with a combination of signals corresponding to the formula, (x) Xd. The device will retain an output signal equal to 1 with the subsequent disappearance of both signals x and x due to the fact that

the signal at the first input of the first element And 2 of the third switching unit will be supported by feedback from the output of the second element And 3 of this block until the signal x is removed.

Thus, the proposed device has a higher speed due to the use of contactless elements with one-way conductivity, for example, microcircuits.

Claims (2)

1. USSR author's certificate No. 269599, cl. G 06 F 7/00, 1968. 2. USSR author's certificate No. 427336, cl. G 06 F 7/00, 1972 (pro5 hotip).