SU1670627A1 - Pulse duration meter - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automatic communication devices to determine the minimum duration of telegraphic packages. The purpose of the invention is to expand the field of application by allowing the device to operate with a sequence of pulses, a priori information about the range of durations that is missing - is achieved by introducing the second pulse generator 11, the element OR 12, and the block 8 for selecting one pulse. In addition, the device contains a digital pulse width meter 1, a generator 2, a key 3, a pulse counter 4, a comparison element 5, a memory element 6, a pulse former 7, a D-flip-flop 9, element 10, element 13 and delay element 14 . 1 il.

Description

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The invention relates to a pulse technique and can be used in automatic communication devices to determine the minimum duration of telegraphic packages.

The purpose of the invention is to expand the field of application by allowing the device to be used for operating with a sequence of pulses, a priori information about the range of durations of which is missing.

The drawing shows a diagram of the device for measuring the pulse duration.

The device contains a digital pulse width meter 1, a generator 2, a key 3, a pulse counter 4, a comparison element 5, a memory element 6, a pulse shaper 7, a single pulse extraction unit 8, a D-flip-flop 9, an And 10 element, a shaper 11 pulses in decay, the element OR 12, the element And 13 and the element 14 delay.

The device works as follows.

The formed telegraph parcels with randomly varying duration are fed to the input of the device. Using the Start signal, the block 8 for selecting a single pulse of the parcel is set to the ready state. A Start signal can be generated at any moment of the pulse existence at the device input. The impulse of the parcel at the input of the device enters through the element 9 of the open trigger 9 and the input of the imaging device 11 and simultaneously opens the key 3 of the meter 1, while the input of the counter 4 starts to receive the input pulse of the generator 2. At the end of the pulse at the input of the unit 8, the imaging device 11, and A code at the output of the counter 4, proportional to the duration of the input pulse, is recorded in the memory element 6. The end of the pulse at the input of the device starts the driver 7, the signal from the output of which through the delay element 14 triggers the counter 4 of the meter 1. From this moment

a code proportional to the duration of the input pulses is compared on the comparison element 5 with the code recorded in memory element 6, and in the case where the output code is

counter 4 is less than the code at the output of memory element 6, element 13 is in the open state by a signal from the output of comparison element 5 and pulse from the output of shaper 7 through element 13 and element OR 12

passes to the input of memory element 6 and writes into it the code of the number at the outputs of counter 4.

After measuring the duration of a large number of pulses in memory element 6

code is recorded. corresponding to the minimum duration of the telegraph package.

Claims (1)

Formula of Invention Duration Measurement Device impulses containing a pulse shaper, a digital pulse width meter, a memory element, a comparison element, a delay element and an element, and the input of the pulse shaper connected to the device input and the output to the first input of the And element and through the delay element to the digital reset input pulse duration meter, the outputs of which are connected to information the inputs of the memory element and the second inputs of the comparison element, the first inputs of which are connected to the outputs of the memory element, the output of the comparison element is connected to the second input of the AND element, so that, in order to expand the field of application of the device , a second pulse shaper, an OR element and a single pulse extraction unit are inputted to it, the output of which is connected via the second pulse shaper to the first input of the OR element, the second input of which is connected to the output of the AND element, and the output is connected to the control input element memory bus is connected to a second start the input of the single pulse selection unit, the first input of which is connected to the input of the device.