SU1103352A1 - Device for generating pulse trains - Google Patents

Abstract

A DEVICE FOR FORMING A SERIES OF PULSES containing a pulse generator, the output of which is connected to the first inputs of the first and second elements AND whose output of the element AND is connected via a trigger to the second input of the first element AND, the second input of the trigger is connected to the output of the first element OR and the first input of the storage unit programs whose outputs are connected through the second element OR to the second input of the second element AND and through the block of elements AND to the inputs of the first element OR, characterized in that, c; as1 and) functionality by adjusting the interval between the pulse series, the driver unit and the serially connected pulse generator, trigger, AND element, OR element and pulse distributor, the bit inputs of which are connected to the outputs of the driver unit, whose input connected to the output of the pulse generator, whose input is connected to the output of the second OR element, the output of the pulse distributor is connected to the second input of the additional trigger and to the second input the program storage unit, the bit outputs of the pulse distributor are connected to the second inputs of the AND block, and the second additional input (L of the OR element is connected to the output of the first And element, the first input of which is connected to the second input of the additional I.

Description

with

The invention relates to a pulse technique and can be used in electronic computing devices and in master automation software devices.

A device for forming a series of pulses is known, comprising a pulse generator, a key block, a pulse counter, an AND block, a program storage block, a trigger 1.

Its disadvantage is the relatively low noise immunity of operation due to the possibility of the appearance of incomplete cut pulses in a series of pulses.

The closest in technical essence to the present invention is a device for forming a series of pulses comprising a pulse generator, the output of which is connected to the first inputs of the first and second elements AND, the output of the second element AND is connected via a trigger to the second input of the first element And, the second input of the trigger is connected to the output of the first element OR and the first input of the program storage unit, the outputs of which are connected through the second element OR to the second input of the second element AND and through the block of elements AND to the inputs of the first ele OR or block delay elements 2.

The disadvantages of this device are limited functionality, since the device can form a series of N pulses with only one constant value of the pulse frequency in the series, and the following condition must be met, caused by the relationship between the delay time of the series-connected delay elements and the oscillator frequency pulses

(N-1) .NT,

where T is the period of the pulse generator;

N is the number of pulses in the series.

If it is necessary to form a series of pulses with a different value of the pulse frequency of the series (by changing the generator frequency), it is necessary to replace all N series-connected delay elements with others that would provide the above dependence for a different frequency value of the generator.

The device does not allow to change the intervals between the formed series of pulses.

The purpose of the invention is to expand the functionality by adjusting the intervals between the series of pulses.

The goal is achieved by the fact that in the device for forming a series of pulses, containing a pulse generator, the output of which is connected to the first inputs of the first and second elements AND, the output of the second element AND is connected via a trigger to the second input of the first element And, the second input of the trigger is connected to the output of the first the OR element and the first input of the program storage block whose outputs

connected through the second element OR to the second input of the second element AND and through the block of elements AND to the inputs of the first element OR, the master block and the series connected

 pulse generator, trigger, AND element, OR element and pulse distributor, the serial inputs of which are connected to the outputs of the master unit, the input of which is connected to the output of the pulse former, the input of which is connected to the output of the second OR element, the output of the pulse distributor is connected to the second input an additional trigger and to the second input of the program storage unit, the bitwise outputs of the pulse distributor are connected to the second inputs of the AND block of the element, and the second input of the additional element OR is connected to the output of the first element, the first input of which is connected to the second input of the additional element I.

5 FIG. 1 shows functional

a circuit for forming a series of pulses; in fig. 2 - program storage unit; in fig. 3 - master unit.

The device for forming a series of pulses contains a generator of 1 pulses, a distribution of 2 pulses, a driver unit 3, a program storage unit 4, elements AND 5, 6 and 7, triggers 8, 9, elements OR 10, 11, 12, a unit 13 elements AND, shaper 14 pulses, output bus 15.

5 The output of the pulse generator 1 is connected to the first input of the AND 5 element and to the second inputs of the AND 6, 7 elements, the output of the AND 5 element is connected to a busbar 15 and to the first input of the OR 10 element, the second input of which

0 is connected to the output of the AND 7 element, the second input of the AND 5 element is connected to the forward output of the trigger 8, the zero input of which is connected to the first input of the program storage block 4 and to the output of the OR element 11. The inputs of the OR 11 element are connected to the outputs of the AND elements of the block 13, the first inputs of which are connected to the corresponding output of block 4 of the program storage and to the inputs of the element -OR 12, the output of the element OR 12 is connected to the first input of the element 6, the output of which is connected to the single input of the trigger 8, the first input of the element 7 is connected to direct output t rigger 9, the output of the element OR 10 is connected to the input of the distributor 2 pulses, the outputs of which are connected to the second inputs of the elements AND block 13; The bit inputs of the pulse distributor 2 are connected to the corresponding outputs of the driver unit 3, the read input of which is connected to the output of the pulse former 14 and to the single input of the trigger 9, the zero input of the trigger 9 is connected to the output of the pulse distributor 2 and to the second input of the program storage unit 4, and the input of the driver 14 is connected to the output of the element OR 12.

The program storage unit shown in FIG. 2, contains the shift register 16, the trigger 17, the AND elements 18, the leading edge former 19, the OR element 20, the outputs 21, 22 and 23.

The driver unit 3 shown in FIG. 3, contains the first group of elements AND 24, the second group of elements AND 25, the elements NOT 26, switches 27, the input 28 of reading.

In the initial state, by the reset pulse, the triggers 8, 9 of the distributor 2 pulses, the trigger 17, the triggers of the shift register register 16 of the program storage unit 4 are set to the zero state (not shown). At the same time, elements And 5, 7 are closed by a low potential of the direct outputs of the flip-flops 8, 9, respectively, elements And of the block 13 are closed at one input by a low potential of the outputs of the distributor 2 pulses, and at the second inputs are closed by a low potential from the outputs of the elements And 18, respectively, of the storage unit 4 programs. The elements And 18 of the program storage unit 4 are closed by low potential of the direct trigger 17 at single inputs, and closed at the second inputs by the low potential of the direct outputs of the shift triggers 16 of the program storage unit 4. Element And 6 is closed by the low potential of the element OR 12. At the output of the former 14, the low potential. Elements 24 and 25 are closed. At the first inputs, low potential is applied to input 28 from the output of shaper 14.

The program storage unit 4 shown in FIG. 2, works as follows.

When triggering the trigger 17 to the zero state from a positive pulse coming from the output of the element OR 11, the leading edge of the high potential at its inverse output, the former 19 generates a positive pulse that, at the pulse input of the shift register 16, shifts the unit stored in one of the bits of the register, in the subsequent discharge. G1 this opens the element I 18 corresponding to this bit on the first input. On the second inputs the elements I 18 are closed with a low potential of the direct output of the trigger 17. Before roan polozhitelnym- operation signal input at the installation schinu, zanosits unit in the first bit of the shift register 16. When trigger 17 is switched to a single state (by a start signal or by a signal from the output of the distributor 2), one of the elements And 18 (depending on the location of the unit in the shift register 16) opens with a high potential for direct output of the trigger 17, and A high potential appears at the corresponding output of the element AND 5 18.

The driver unit 3 shown in FIG. 3, works as follows.

Prior to the arrival of a positive impulse at the input 28, the And 24 elements and the And 25 elements are closed. At their outputs low potentials. With the arrival of a positive pulse in each bit of the driver unit 3, the element AND 24 or the element AND 25 is opened, depending on the state of the switch 27 of this bit. If the switch 5-27 is on, the AND 24 element opens and a positive impulse appears at its output. . If switch 27 is turned on, then a positive pulse occurs at the output of AND 25.

0 The device (Fig. 1) works as follows.

The signal "Setup is recorded the first bit of the shift register of the program storage unit. At the start signal, a high potential appears on its first output busbar and the first element of block 13 opens on the first input. In addition, the OR 12 element opens, and the high output potential of which opens the 6. And element 6 on the first input.

0 the next pulse of the generator 1 passes through the element AND 6 to the single input of the trigger 8 and on the trailing edge of the pulse the trigger 8 switches to the single state and opens the element AND 5 on the first input. The next pulse of the generator I passes

5 through the element AND 5 to the output busbar 15 and through the element OR 10 to the counting input of the distributor 2 pulses. The formation of the first series of pulses begins. At the end of the pulse at the input of the distributor 2 (on the trailing edge), it is written "1", and at its first output a high potential appears, opening the first element of AND of block 13, the high output potential of which goes through the element OR 11 to zero input trigger 8 and on

5, the first input of the program storage unit 4. At the same time, a low potential appears again at its first output. The first element of block 13 is closed, and a low potential appears at its output and at the output of the element OR 11. This returns

0 into the zero state trigger 8 (on the trailing edge of the positive pulse), the element 5 is closed and the formation on the bus 15 of the device of the first series consisting of a single pulse ends.

When there is a low potential on

5, a low potential at the output of the element OR 12, the closing element AND 6, appears in the first output of block 4, and the driver 14 (on the front of the negative differential) is triggered. The positive pulse at the output of the imaging unit 14 switches the trigger 9 to a single state, and, arriving at the read input of the master unit 3, transfers from the master unit 3 to the corresponding раз bits of the distributor 2, the code defining the duration between the first and second series of pulses. After switching the trigger 9 into a single state, the element AND 7 opens and the pulses of the generator 1 begin to flow through the element 7 and OR 10 to the counting input of the distributor 2 pulses. The countdown of the first interval begins until the overflow pulse appears at the output of the distributor 2.

An overflow pulse from the output of the distributor 2 is fed to the zero input of the trigger 9 and to the second input of the program storage unit 4. When the trigger 9 is switched to the zero state, the element 7 is closed and the flow of the generator 1 pulses to the counting input of the distributor 2 stops. After the pulse arrives at the second input of unit 4, a high potential appears at its second output, which opens the second element I at the first input block 13. The high potential from the second output of block 4 again opens the elements OR 12, AND 6. The next impulse of the generator 1 through the element 6 again sets (on the falling edge) the trigger 8 into one state. The element 5 is opened and c the next pulse of the generator 1 passes to the output bus 15 of the device and through the element OR 10 to the counting input of the distributor 2 pulses. The formation of the second series of pulses begins.

At the end of the second pulse on the output bus 15 and at the input of the distributor 2 in the latter will write "2". At the same time, the second element I of block 13 opens and the high potential from its output again goes through the element OR 11 to the zero input of the trigger 8 and to the first input of the program storage block 4. This closes the element AND 5 and a low potential appears at the second output of block 4. The formation on the bus 15 of the device of the second series consisting of two pulses ends. When a low potential appears at the second output of block 4, a low potential appears at the output of the element OR 12, the element 6 is closed, and the pulse shaper 14 is triggered again. The output pulse of the imaging unit 14 again transfers the code defining the length of the time interval between the second and third series of pulses from the master block 3 to the distributor 2 and switches the trigger 9 to one state. The element 7 opens and the countdown of the second interval begins

5, etc.

Thus, on the device bar 15, a series of pulses is formed, the number of pulses in which increases as a sequence of natural numbers.

When connecting the second inputs of the elements AND block 13, respectively, to those outputs of the distributor 2, which are selected when the number of pulses from the generator 1, increasing according to law 2, arrives at its input (where K is 0,1,2,3,4, etc. .),

5 on the busbar 15 devices will form a series of pulses with the number of pulses increasing in powers of 2. For example, when connecting the second inputs of elements AND of the block 13 to 1, respectively, 2.4.8, etc. The outputs of the distributor at the output will form a series containing 1,2,4,8, etc. pulses.

By connecting the second inputs of the elements And the block 13 to the other outputs of the distributor 2, it is possible to ensure any law of alternation of the numbers of pulses in the series.

Thus, this device is

Compared to the known, it allows the functionality to be extended by varying the length of the time intervals between the generated pulse series by changing the overflow time of the pulse distributor by introducing a correction code into it each time before starting the reference time interval.

2 in.

figure 1

Claims (1)

DEVICE FOR FORMING SERIES OF PULSES, containing a pulse generator, the output of which is connected to the first inputs of the first and second elements AND, the output of which element And is connected via a trigger to the second input of the first element And, the second input of the trigger is connected to the output of the first OR element and the first input of the storage unit programs whose outputs are connected through the second OR element to the second input of the second AND element and through the block of elements AND to the inputs of the first OR element, characterized in that, in order to expand the functional capabilities by adjusting the interval between series of pulses, the driver unit and serially connected pulse shaper, trigger, AND element, OR element and pulse distributor, whose bit inputs are connected to the outputs of the driver unit, the input of which is connected to the output of the pulse shaper, are additionally introduced into it coupled to an output of the second OR gate, the pulse distributor output connected to the second input of the additional flip-flop to the ^second: th entry program storage unit, hitting yadnye outputs pulse distributor connected to the second inputs of the block element $ cops and, as a second input an additional OR gate connected to the output of the first AND gate, a first input of which is connected to the second input of the complementary element I. SU „„ 1103352>