SU504225A1 - Device for converting pulse signals - Google Patents

Description

one

The invention relates to mechanics and can be used in the development of various units designed for suppressing amplitude noise. Devices for signal conversion are known, which contain logic elements | AND, ILC ,, delay lines and purpose: to select different NOT and NAND elements for selecting different types of impulse jcjEjux signals. However, the limited noise immunity prevents interference due to their different time positions. ; The purpose of the invention is to create a device for converting pulse signals, which would eliminate the influence of binary signals B of binary commutation signals (axes with different combinations.,;,

This is achieved due to the fact that the first input of the device through the element is NOT connected to the first inputs of the first and second elements AND-NOT the second input of the first element AND-NOT to the second input of the device and the first input of the second element AND NOT, the outputs of the first, second and third elements AND-NOT connected to the corresponding inputs of the fourth element AND-NOT, the output of which is connected to the second j inputs of the second and third elements AND-LE

FIG. 1 is a block diagram of a device for converting pulse signals; in fig. 2 - time diagram of his work.

The block diagram contains (element AND-NOT, element NOT 4 and element AND-NOT 5.

In the time cument 1 {, the first input of the device receives a signal corresponding to a logical one, and the second input of the device receives a signal corresponding to a logical zero. With such a combination, the AI of the input signals to the output of the device; (output element 5) the value corresponding to logical zero will be set. When changing information at the inputs of the device, (moment of time t,), the value of a logical unit will be set at its output.

The state of the circuit at time t corresponds to its state; meni

At the time, the actions of the input set corresponding to the time t on the first

and the second entrance, externally denied; This is an effective noise {time point b), which changed the input: information to false. On the first akofle device, the value of logical zero is set, g

The device circuit is constructed in such a way that the arising interference will not change the output state. The correct value of the zero on the second 1 input of the device does not change, and therefore; from the exit. JQ of element 2 to the input of element 5 continues to arrive at the logical unit, and the false value i of the logical zero at the first input does not change the value of element 3, since the feedback circuit, the output of the device, goes to steady state at time tj, the value of logical zero. The device will retain its state until the change of logical signals at its two inputs, 20

The scheme works in a similar way under the action of positive interference in the moment; time t.

When considering the operation of the circuit, it was assumed that the communication wires were located all along the line and imx signals of the same sign were induced on imx.

Claims (1)

Invention Formula A device for converting pulse signals containing elements NOT and NAND, characterized in that, in order to improve noise immunity, the first input of the device is NOT connected to the first inputs of the first and the second AND elements NOT through the element, and the NAND connected to the second input of the device and the first input of the third element NAND ,. the outputs of the first, second: i of the third element AND-NOT connected to the corresponding inputs of the fourth element AND-NOT, the output of which is connected with; the second inputs of the second and third elements AND-HE.j, / 5x I Fi.8.1 External HaSeStHHon ponnr L / 1 1 i f 3 P . .u u X t ..rr-rr cr YA / DZ ewJTT BbDiS GSh I.