SU1274138A1 - Pulse-time comparator - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automatic control systems and in control and measurement systems. The aim of the invention is to increase speed and increase functionality by adjusting the number of comparisons. The goal was achieved through the introduction of a decoder 15, a .16 switch and four elements OR 17-20. 3 the device also includes a pulse shaper I, a one-shot 2, elements OF, 5, 10, 12, 13, pulse counters 4 and 14, two triggers 6 and 8, elements OR 7 and 9, element I delay. 1 spf., 1 Il. (L ind sj cx

Description

1 The invention relates to a pulse technique and can be used in automatic control systems and in control and measuring systems. The aim of the invention is to increase the speed and the expansion of fuctional capabilities by adjusting the number of comparisons. The drawing shows a structural diagram. The pulse comparator contains the pulse former 1, the input of which is the device input, and the output is connected through the one-vibrator 2 to the first input of the first element 3 and directly to the second input of the first element 3 and the counting input of the first counter 4 pulses, the second element 5, the output of which is connected to the first input of the first, trigger 6 and the first input of the first element OR 7, the output of which is connected to the first input of the second trigger 8, and the second input to the first input of the second element OR 9, the output connected to the second The first input of the first trigger 6 and the output of the third element And 10, the first input of which is connected to the first input of the second element And 5, the output of the delay element 11 and the first input of the fourth element And 12 ,. the output of which is connected to the second input of the second element OR 9 and the second input of the second trigger, the fifth element I 13, the second counter 14 pulses, the decoder 15, the switch 16, and the third, fourth, fifth and test elements OR 17-20 The output of the first element I 3 is connected to the counting input of the second pulse counter 14, the input of which is zero with the installation input of the first counter of the pulses 4. and connected to the output of the fifth element I 13 connected by the first input to the output of the delay element 11 whose input is connected to the counting input The house of the first counter has 4 pulses, the bit outputs of the first and second counters 4 and 14 are connected to the inputs of the decoder 15 connected to the inputs of the switch 16, the outputs of which are connected to the inputs of the third, fourth and fifth elements OR 17-19, output which are connected to the second inputs 8 of the second, third and fourth elements AND 5, 10, 12, respectively, as well as with the inputs of the sixth element OR 20 connected by an output to the second input of the fifth element AND 13. Shaper 1 generates, at the output, rectangular pulsesotorrhea equal to the duration of intervals defined by the input device (pulse duration of arbitrary shape, the interval between two short pulses, etc.). The single-oscillator 2 generates at the output a square pulse of a reference duration TQ, the beginning of which coincides with the moment when a short trigger pulse is fed to its input. Element 11 delays the pulse for a time sufficient to trigger the counters 4 and 14, while the counters 4 and 14 are normally. binary accumulative counters with the same number of bits; the pulse arriving at the reset input of the counter sets it to zero. Counter 4 records the number i of comparisons made, and counter 14, the corresponding number K ,. Switch 16 is a group of three-way switches that allow you to connect any output of the decoder 15 to the input of any (only one at a time) of the OR elements 17-19 (only a small part of the decoder 15 outputs are actually used — only those that correspond to the filled cells of the table, i.e., the number of these switches is small, denote by T the duration of the i-th (, 2, ...) input time interval of the device, i.e., the duration of the rectangular pulse at the output of the imaging unit 1, through T the duration The device operates as follows. In the initial state, counters 4 and 14 and triggers 6 and 8 are set to zero, denoted by S and Si, the states of triggers 6 and 8, respectively. The initial combination of S 0; S 0 encodes the absence of any or solutions. Consider the operation of the device in the case when n 7; K 3; K 4, i.e., counters 4 and 14 can be as little as 3 bits; decisions are made according to the following rules: M 312

at K 0; one; 2; P - at K 3; four; B - at K 5; 6; 7, where n is a predetermined number equal to the conversion factor of the first pulse counter; K, K - predetermined numbers,., T T M;

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T, T P; T T B. X o In,

Possible combinations of i and k; correspond to the unchecked cells of the table. The value of i increases from zero to seven, and - each value of i can correspond to any value of O tf K, 5 i. With combinations of 84

The scientific research institute i and k, which correspond to empty cells of the table, cannot be accepted yet; it is necessary to continue the implementation of comparisons (.increase i). In the cells of the table, the corresponding combinations of values of i and K-, for which the solution is already uniquely defined, this solution is indicated. The combinations corresponding to the crossed out cells of the table cannot appear if the decisions are made in accordance with the filled cells.

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The output bus of the decoder 15, the corresponding combinations of i and K; for which solution B is indicated in the cells of the table, must be connected via switch 16 to the inputs of the element OR.17, the output bus of the decoder 15 corresponding to the cell, in which the solution P is indicated to the inputs the element OR 18; output slots corresponding to cells in which solution M is indicated — to the inputs of the element OR 19; At the same time, in the initial state of the device, the signals at the outputs of the elements OR 17-19 (and, accordingly, the element OR 20) are absent, i.e. elements OF 10, 12 and 13 are closed at the second entrances.

Claims (1)

Each (i-th, i 1,2, ...) output impulse of the imager 1 triggers a one-shot front edge 2. 51 If this condition is met, then a rectangular impulse of duration T; - T, occurs at the output of the first element I 3 terminating simultaneously with the output pulse of shaper 1. At the moment of forming the trailing edge of the output pulse of shaper 1, a unit is added to counter 4, and if this condition is met, counter 14 is recorded in counter 4, and counter 14 is recorded in counter 4 - number K-. As soon as the value of i increases, the combination of i and K values is reached, at which the solution is already determined (combinations corresponding to the filled cells of the table), a single signal appears at the output of one of the elements 17-19, that is, at the second input of one from elements 5, 10 and 12, as well as to the output of the element OR 20, i.e. at the second input of the element And 13, the Short pulse generated at the moment of termination of each output pulse of the imaging device 1 (rear edge), goes through the delay element 11 to the first inputs of the elements 5, 10, 12 and 13. If decision B is made, the second input only the element And 5 is open, in the case of the decision P - the element And 10, in the case of the decision M - the element And 12, besides in any of these three cases the element I I3 is also open. The impulse from the output of the delay element 11 passes through one of the MtiHTOB And 5, 10 and 12 (if the decision has already been made), arriving at the inputs of three 6 and 8 and fixing the decision; in any solution, the pulse from the output of the delay element 11 also passes through the element 13 and returns to zero the counters 4 and 14. The solutions are encoded by the states of the flip-flops 6 and 8 as follows: M - S., 1, Sj O; P - Sj 1, S JpB - S O, S 1. After making the decisions, the devices return to the initial state, the difference being that now triggers 6 and 8 fixed the made decision; the device continues to run, preparing the data for the next solution. 86 Due to the presence in the structure of the device of new blocks and new functional connections between the blocks, the decision is made in a number of cases before all n comparisons are made, and e, the average frequency of decision making (speed) noticeably increases, moreover, it is possible to use any values of n, and the values of n, K, K can (due to the presence of the switch 18) be adjusted, which significantly expands the functionality of the device. Claims of the Invention A pulse comparator comprising a pulse shaper, whose input is the device input, and the transducer is connected via a single vibrator to the first input of the first And element and directly to the second input of the first And element and the counting input of the first pulse counter, the second And element whose output is connected with the first input of the first trigger and the first input of the first element OR, the output of which is connected to the first input of the second trigger, and the second input with the first input of the second element OR, the output is connected th to the second input of the first flip-flop and the output. The third AND element, the first input of which is connected to the first input of the second element AND, the output of the delay element and the first input of the fourth element AND, the output of which is connected to the second input of the second OR element and the second input of the second trigger, the fifth And element and the second pulse counter differing By the fact that, in order to increase speed and enhance functionality by providing control of the number of comparisons, a descrambler, a switch and four OR elements are introduced into it, and the output of the first AND element is connected with a counting input of the second pulse counter, the input of which is set to zero is combined with the input of setting the first pulse counter to zero and is connected to the output of the first And element connected to the output of the delay element whose input is connected to the first input of the first. pulse counters, bit outputs of the first and second impulse meters 712741388 owls are connected to the inputs of the decoder, connected to the second inputs of the respective connected outputs to the inputs of the second, third and fourth mutator, the outputs of which are connected by AND elements, as well as with the inputs of the third, fourth and fifth terminals. of the OR element connected by the output of the OR element, the outputs of which are co-5 to the second input of the fifth element AND