SU1667081A1 - Device for pulse distributor testing - Google Patents

Abstract

The invention relates to automation and computing and can be used in the construction of test equipment. A distinctive feature of the device is that it keeps the AND-OR 6.N - 1, 6.N elements in the closed state before the appearance of the input sequence (frequency) and gates the error signal at the output of the Exclusive OR - NOT 2.1 - 2 elements. N pulses of the input sequence in the case of the end of a sequence (pack) of pulses. The aim of the invention is to enhance the functionality by providing control of clock pulses. The goal is achieved by introducing trigger 9, delay element 10, and element 11. 11 Il.

Description

ЖР

Em ef

about

ABOUT

but

00

ho

 The invention relates to automation and computing and can be used in the construction of test equipment.

The aim of the invention is to enhance the functionality by providing control of clock pulses.

FIG. 1 shows a diagram of the proposed device; figure 2 - diagrams of his work.

The device for monitoring the pulse distributor 1 contains a group of 2 elements EXCLUSIVE OR NONE, an element of ILES, an integrator 4, a group of 5 pulse shapers, a group of 6 AND-OR elements, a group of 7 elements NOT, an input 8 specifying the operation mode of the device, a trigger 9, an element 10 delay and element and 11.

In the initial state, at the single output of the trigger 9 is a low potential, which by the third input closes the first AND element entering the nth element, the AND-OR 6.4 element, and the second AND element entering at (p-1) th element AND-OR 6.p. At the output of the integrator 4 - low potential.

Suppose that at input 12 of distributor 1 there is no input frequency (for example, on switching on the supply voltage). In this case, the input (output) of the element 11 is a low potential, which through the integrator 4 is fed to the output 31 of the device malfunction. This situation does not indicate a malfunction of the device. In the known device in this case, the absence of frequency is fixed (perceived) as a failure of the device (Fig. 2, U).

The device works as follows.

Assume that the distribution of the pulses go in the direction Y1, Y2Up (input 8 is a zero signal). During normal operation of the distributor 1, at the moment of changing the pulse of the output Y1 with the pulse of the output Y2, the driver 5.1 of the pulses of the group is started on the falling edge of the pulse of output Y1. At the first input of the element AND-OR 6.1 of the group, a low potential is set (the pulse of the driver), the output of the element AND-OR 6.1 of the group also sets a low potential (at its fourth input, O).

Thus, during normal operation of the distributor 1, the potentials of opposite levels are set at the first and second inputs of the EXCLUSIVE OR OR NOT 2.1 groups of the element: O and G, respectively, at the output of the element

An EXCLUSIVE OR NOT 2.1 group sets a low potential that goes to the first input of an element OR 3. At the first and second inputs of the remaining elements, EXCLUSIVE OR NOT 2.22p

the groups also established potentials of opposite levels: 1 and O, respectively. At the remaining inputs of the element OR 3 low levels are set. 0 Low potential from the output of the element OR 3 through the element AND 11 and the integrator 4 enters the output 13 of the malfunction of the device.

5 Thus, the presence of O at the output of the integrator 4 indicates the normal operation of the distributor.

When the direction of the pulse distribution at the input 8 of the device changes, the zero signal changes to the opposite, the pulse distribution goes in the direction YnY2, Y1.

In case of malfunctioning, distribute 5 l 1 the device works as follows.

For example, when a pulse is changed at the output Y2, the pulse of the output Y1 is not the pulse Y1 (in Fig. 2 the dashed line). In this case, a low potential is kept at the second input of the EXCLUSIVE OR-NOT 2.p group, a low level impulse is formed at the first input of this element (output formed by 5 bodies 5.2), as on both inputs of the element an exclusive OR-NOT 2.p groups are set to the potentials of one level, at its output a high level potential is established, which is through the element OR 3.

0 element And 11 and integrator 4 is output to output 13 faulty: and devices, which indicates a defect in the operation of the distributor 1.

For example, when changing the output pulse

5 Y1, the output pulse Y2 is produced by the output pulse Y2, and the output pulse Y1 does not disappear. In this case, a high potential is set at the second input of the EXCLUSIVE ILY-NOT 2.n group, a high potential is also present at the first input of the same element, since there is no start of the group 5.2 pulse generator (due to the absence of the back pulse of the output Y1. since the momentum Y1 is not

5 disappears; figure 2 - dashed line). Thus, at the first and second inputs of the EXCLUSIVE OR-NOT 2.n element of the group, the potentials of a high level are set, at the output of this element there is also a high potential, which through the element OR 3, element 11

and integrator 4 is fed to the output of the device malfunction, which indicates a defect in the work of the distributor.

The device works similarly with simultaneous occurrence of pulses, for example, at the output Y1 and at the output Y3 or another output, when a pulse is changed at the output Y1 by a pulse at the output Y3 (jump).

For example, if the input frequency of an input frequency in the form of certain bursts of pulses, the device does not perceive the absence of a frequency at the input of the distributor 1 as a fault, the output 13 of the device’s malfunction has a low potential from the output of the element 11.

and,

tz

and,

bl

4 4 4 zigp and,.

0

five

Claims (1)

Claims of Invention A device for controlling a pulse distributor as per auth.s. No. 1441403, characterized in that, in order to extend the functionality by providing control of clock pulses, a trigger, a delay element and an AND element are introduced into the device, the clock input of the controlled distributor connected to the trigger synchronization input, and a clock the input of the device, the trigger output is connected to the third input of the (n-1) -th AND-OR element and the third input of the n-th AND-OR element, the output of the delay element is connected to the first input of the AND element, the second input of which is connected to the output of the ment OR. output element And is connected to the input of the integrator. l tin BUT