SU1088106A1 - Device for selecting pulses from pulse sequence - Google Patents

Abstract

A DEVICE FOR THE INTRODUCTION OF PULSES FROM A PULSE SEQUENCE, containing a pulse counter, the reset input of which is connected to the control pulse bus. and an inverter, the output of which is connected to the first input of the coincidence element, the second input of which is connected to the clock pulse bus, characterized in that, in order to expand its functionality, by providing a predetermined delay in generating the output pulses, a control command bus and a switch are inserted into it, the bit inputs of which are connected to the corresponding outputs of the pulse counter, the control input is connected to the control command bus, the first output is connected to the input i of the inverter, and the second output is connected to the third input of the element ovpadeni, the second input of which is connected to the counting input of pulse counter. § jf 00 00 o O) F (/ hL

Description

The invention relates to a pulse technique and can be used in automated process control systems for performing a series of sequential program operations. A device is known that contains a trigger, the counting input of which is connected to the first input bus, the output to the first input of a matching element, the second input of which is connected via an inverter to the second input bus, which through the delay element is connected to the reset input of the trigger G1 J The disadvantage of this device is that it provides only the selection of the first single pulse on the first input bus for the period between the pulses on the second input bus. The closest in technical essence to the invention is a device comprising an imiuls counter, the reset input of which is connected to a control pulse bus, and an inverter, the output of which is connected to the first input of a coincidence element, the second input of which is connected to a clock bus, and the first trigger input, the output of which is connected to the input of the inverto and the second input from the input of the pulse counter reset, the counting input connected to the output of the matching element and the code to the third input of the coincidence element t2}. A disadvantage of the known devices lies in the limited functional possibilities, since it has the ability to start the formation of output pulses with a predetermined delay. The purpose of the invention is to expand the functionality by providing a predetermined delay in the formation of output pulses. This goal is achieved by the fact that a device for selecting pulses FROM a pulse sequence, containing a pulse counter, the reset input of which is connected to the control bus of impulse B, and an inverter, the output of which is connected to the "first input of the coincidence element, the second input of which is connected a control command bus and a switch, the bit inputs of which are connected to the corresponding pulse counter outputs, the control input with a control command bus, the first output with an inverted input pa, and the second output - to a third input of the coincidence element the second input of which is connected to the counting input of pulse counter. FIG. 1 shows a functional diagram of the device; in fig. 2 time diagrams for his work. A device for removing pulses from a pulse sequence contains a pulse counter 1, the reset input of which is connected to the bus 2 of control pulses, and an inverter 3 whose output is connected to the first input of the coincidence element 4, a switch 5 whose discharge inputs are connected to the corresponding outputs of counter 1 pulses, the control input — with the control command bus 6, the first output — with the input of the inverter 3, and the second output — with the third input of the coincidence element 4, the second input of which is connected to the counting input of the pulse counter 1 and with the bus 7 clock pulses. The device works in the following way. In the initial state, the counter 1 is reset by a low level of the control signal on bus 2 (Fig. 2 a). As a result, low levels are also set at the outputs of counter 1 and at the output of element 4 (fig. 2b, d) and high level at the output of inverter 3 (fig. 2e). When a high level control signal is applied to bus 2, the counter begins to count the pulse sequence present on bus 7 (Fig. 25). when the counter t is filled to a certain value, a high level appears at the second output of the switch 5 (Fig. 2c), which ensures the passage of pulses from the bus 7 to the output of the element 4 (Fig. 26). Further filling of the counter 1 leads to the appearance of a high level at the first output of the switch 5 (Fig. 2 a), and therefore low at the first input of the element 4 (Fig. 23), which leads to the end of the formation of the output pulse sequence (Fig. 26 ). The device rotates to its initial state after the appearance of a low level on bus 2.

The moments of operation of elements of the device separated in time exclude any false pulses at its output.

A change in the signals on the control command bus 6 allows remote control

holding the pulse sequence and the number of pulses in it.

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Thus, the proposed device allows, in comparison with the basic object, which is built according to the scheme of the known device, to expand the functionality of the device, which defines a wider scope of its application.

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Claims (1)

A device for isolating pulses from a pulse sequence, comprising a pulse counter, a reset input of which is connected to the control pulse bus, and an inverter, the output of which is connected to the first input of the coincidence element, the second input of which is connected to the clock pulse bus, characterized in that expanding functionality by providing a given delay in the formation of output pulses, a command command bus and a switch are introduced into it, the bit inputs of which are connected to the corresponding of the pulse counter outputs, a control input - the bus control commands, the first output - to an input of the inverter, and the second output - to a third input of the coincidence element the second input of which is connected to the counting input of pulse counter. Figure 1 -SU „„ 1088106