SU1084980A1 - Device for converting pulse train to rectangular pulse - Google Patents

Abstract

A DEVICE FOR TRANSFORMING A SERIES OF PULSES TO A RECTANGULAR PULSE, containing a delay element whose input is connected to the input bus and an output to the input of a differentiating circuit whose output is connected to the first input of the And element whose output is connected to the first trigger input whose output is connected to the output bus device, characterized in that, in order to increase the reliability of the device, it introduced the element of the ban, the first input of which is connected to the output of the differentiating circuit, and the second input - with the input bus and V And the input of the element, the output of the element is connected to the second input of the trigger. with

Description

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The invention relates to a pulse technique and can be used in automation systems to form an envelope.

The known converter of a burst of pulses into a rectangular pulse containing two triggers, two coincidence elements, a pulse generator, a divider and a counter Cl. The disadvantages of this device are the design complexity and low conversion accuracy.

Closest to the invention

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technically, there is a device for converting a series of pulses, containing a delay element whose input is connected to the input bus and an output to a differentiating circuit input whose output is connected to the first input of the element AND whose output is connected to the first trigger input, the output of which is connected to the output bus device, as well as the second trigger and the second delay element L2J.

A disadvantage of the known device is the complexity and low reliability of operation.

The purpose of the invention is to simplify the device and increase the reliability of its operation.

This goal is achieved in that a device for converting a series of pulses into a rectangular pulse containing a delay element whose input is connected to the input bus and an output to the input of a differentiating circuit whose output is connected to the first input of the element AND whose output is connected to the first input trigger, the output of which is connected to the output bus of the device, a prohibition element is entered, the first input is connected to the output of the differentiating circuit, and the second input is connected to the input bus of the device and the second input of the element I, output lementa ban is connected to a second input of the flip-flop.

FIG. 1 shows a functional diagram of the device; in fig. 2 timing charts of the device.

A device for converting a series of pulses contains a delay element 1, the input of which is connected to the input bus 2, and the output is connected to the input of the differentiating circuit 3, the output of which is connected to the first input

element 4, the output of which is connected to the first input of the trigger 5, the output of which is connected to the output bus 6 of the device. The device also contains a prohibition element 7, the first input of which is connected to the output of the differentiating circuit 3, and the second input is connected to the input bus 2 of the device and the second input of the AND element, the output of the prohibition element 7 is connected to the second input of the trigger 5.

The device works as follows. ,

In the initial state, trigger 5 is in the zero state. A series of pulses arriving at the input bus 2 of the device (Fig. 2a) after some time Atj, determined by the delay on the delay element 1, enters the input of the differentiating circuit 3 (Fig. 26), at the output of which short pulses coinciding in time with the leading edges of the delayed pulses of the series (Fig. 2c).

The delay time on element 1 is chosen such that the condition

. -G, where T is the period of the pulse following in the series; t is the pulse duration.

In this case, all short pulses from the output of the differentiating circuit 3 except the last one corresponding to the last pulse in the series (Fig. 2d) pass to the output of the element And 4. The first pulse from the output of the element And 4 switches the trigger 5 to the one state (Fig .2e). The last pulse from the output of the differentiating circuit 3 passes to the output of the prohibition element 7 (Fig. 2e) and, arriving at the second input of the trigger 5, resets the last one to the zero state (Fig. 2e),

Thus, elimination of the delay element and the trigger from the known device makes it possible to increase the reliability of the device operation by eliminating the false alarms of this trigger, leading to the appearance of a false signal at the output of the second trigger.

The device can be built on the digital elements of the basic series. The differentiating circuit may, for example, consist of an RC circuit in which a diode is connected parallel to the resistor to eliminate pulses having a negative polarity.

FIG.

Claims (1)

DEVICE FOR TRANSFORMING A SERIES OF PULSES TO A RECTANGULAR PULSE, containing a delay element, the input of which is connected to the input bus, and the output - to the input of the differentiating circuit, the output of which is connected to the first input of the element And, the output of which is connected to the first input of the trigger, the output of which is connected to the output device bus, characterized in that, in order to increase the reliability of the device, a prohibition element is introduced into it, the first input of which is connected to the output of the differentiating circuit, and the second input to the input bus and the second Odom element and the output element of the ban is connected to the second input of the trigger. Figure 1