SU705650A2 - Device for forming pulse trains - Google Patents

Description

(54) DEVICE FOR THE FORMATION OF A SERIES OF PULSES

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The invention relates to automation and computing and can be used; Called in setting software devices, in particular, to control and configure the pulse counting app | atura.

According to the main author's certificate No. 456357, a device for forming a series of pulses is known, comprising a pulse generator, a pulse counter, an AND block, a program storage block, and a trigger. The output of the pulse generator through the key is connected to the input of the pulse counter. The code outputs of the program storage unit are connected in parallel via the AND block to the corresponding inputs of the pulse counter, the output of which is connected to the input of the program storage block and to the zero input of the trigger. A single trigger input is connected to the inputs of a block of an element AND and an output of a program storage unit, and a single output of a trigger is connected to a control input of a key.

A disadvantage of the known device is that during the formation of a series of pulses, the duration of the first and last pulses in the series may be distorted.

since the appearance of the signal from the output of the program storage unit, which sets the trigger to one state, can occur simultaneously or later the appearance of the leading edge of the first pulse, and the signal from the output of the pulse counter, which sets the trigger to the zero state, can occur earlier occurrences of the trailing edge of the last pulse. “The purpose of the invention is to eliminate distortions in the duration of the first and last pulses in a series.

To do this, the device containing g. pulse generator, the output of which is connected to the primary key input, program storage unit, whose code outputs through

Claims (3)

The block of elements H is connected to the inputs of the counter bits. pulses, the output of which is connected to. the first input of the trigger and the input of the program storage unit, the output of which is connected to the control input of the block of elements And to the second input of the trigger, the output of which is connected to the second input of the key, the output of the key is connected to the counting input of the counter and the output bus of the device, an inverter and two are entered element And, the outputs of which are connected to the trigger inputs, the output of the pulse generator through the inverter is connected to the first inputs of the first and second elements And, the second inputs of which are connected respectively to the output of the program storage unit and output pulse counter. The drawing shows a structural electrical circuit of the device for forming a series of pulses. The device contains a pulse generator I, a key 2, a pulse counter 3, a program storage unit 4, an AND 5 element block, a trigger 6, an inverter 7 an AND 8 and 9 elements. The output of a pulse generator 1 is connected via a key 2 to an input of a pulse counter 3. An inverter input 7 is connected to the output of the pulse generator 1, and the output of the inverter 7 is connected to the second inputs of the AND elements 8 and 9. The code outputs of the storage unit of the program 4 are bitwise connected through the block of the AND 5 elements to the inputs of the corresponding bits of the pulse counter 3. The cyclic output of the storage unit 4 subkey programs n to the control unit and the input element 5 and the second input of AND gate 8 whose output is connected to a single input trigger 6, whose single output is connected to the control input of the key 2. The output of the pulse counter 3 is connected to the input of the block, storing program 4 and to the second, the input of the element 9, the output of which is connected to the zero input of the trigger 6. The series of pulses are removed from the output of the key. The device works as follows. : In NSHO. ONE state, pulse counter 3 and trigger B are set to zero, key 2 is closed, and on the code outputs of the program 4 storage unit there is a parallel binary code of the number B, ... where w is the number of bits of the pulse counter. owls; D,. Is the number of pulses in the first series according to the program. By the signal f of the cycle output of the storage unit of program 4, the code of the number Bi through block 5 is transferred to pulse counter 3, and since at this moment there is no pulse at the output of pulse generator 1 and there is a high potential at the output of the inverter arriving at the second input of the And 8 element, trigger b is installed in a single state and opens the key. The pulses from the output of the pulse generator 1 are then passed through the key 2 to the output of the device and are counted by pulse counters. 3. At the same time, the duration of the first pulse in the series is not distorted, since key 2 was prepared by trigger 6 even before the first pulse arrived. Upon receipt of the AI pulses, the pulse counter 3 overflows and (at the end of the last pulse) the signal from its output, trigger 6 at the zero input is set to the zero state, since at this moment the pulse at the output of the pulse generator I is absent and at the output of the inverter 7 the high potential arriving at the second input of element 9. As a result of the low potential at the single output of trigger 6, the key 2 closes and the distortion of the duration of the last pulse in the series does not occur, since the signal with t rigger b, the passage of pulses through 2 is prohibited after passing through A | momentum. In addition, the signal from the output of pulse counter 3 arriving at the input of the storage unit of program 4, selects at the code outputs the next number Bg AI according to the program (At is the number of pulses in the second series) and with the required delay arrives at the output of the storage unit 4 of program 4, as a result trigger 6 is set to single state again. In the same way all subsequent cycles of operation of the device proceed. Thus, in a device for forming a series of pulses, during its operation there is no distortion of the durations of the first and last pulses in the series, which distinguishes it favorably from the known device. Inventive device for forming a series of pulses according to the basic certificate of authorship No. 456357, characterized in that in order to eliminate distortions of the durations of the first and last pulses in the series, an inverter and two AND elements, whose outputs are connected to the trigger inputs, the output of the pulse generator through The inverter is connected to the first inputs of the first and second elements I, the second inputs of which are connected respectively to the output of the program storage unit and the output of the pulse counter. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 456357, Mk2, N 03 K 3/64, 1973. / K 4 t i.