SU919071A1 - Pulse distributor - Google Patents

Description

(54) PULSE DISTRIBUTOR

Claims (2)

The invention relates to a pulse technique, namely, devices for the distribution of pulses and can be used in synchronization and control systems. A pulse distributor is known that contains triggers that are connected in a ring circuit, the outputs of which are connected to the AND – NE elements that are also connected in a ring circuit 11. A disadvantage of the known device is a relatively large variation of output pulses in duration. The closest in technical terms to the proposed one is a pulse distributor containing N triggers connected in a ring circuit and 2N I-NOT elements connected in a ring circuit in the first inputs, the direct output of the K-th trigger (,,, .. l) is connected to the second inputs of K and (K + n-1} th elements AND –NE, and the inverse output of the K-th trigger - with the third inputs (K-1) and (K + n) -th elements of AND-NOT however, some trigger inputs are connected to the input bus, and others to the installation bus 2. The disadvantages of this pulse distributor are relative but a large variation in the duration of the output pulses due to a large variation in the switching delay of the flip-flops. The purpose of the invention is to improve the temporal characteristics of the output signals. This goal is achieved in that the pulse distributor containing N connected in series through the D-inputs of the flip-flops and 2 connected in series AND-NES, moreover, the output of the 2 N-th element AND-NOT is connected to the first input of the first element AND-NOT and the output of each element AND-NOT is connected to the corresponding output bus, with the output of each tr igger connected to the second input of the corresponding. element and NOT and the output punch, the trigger inputs are connected to the trigger. the initial setup bus, and the C inputs of 39 even and odd triggers are separately connected to each other, two NOT elements are entered, the first of which is connected to the third inputs of the AND – NE elements from the first to the Nth and the second inputs of the odd AND elements -NOT from (N + i) ro to 2N, and the output of the first element is NOT connected to C-inputs of odd triggers, to the third inputs of even-AND elements NOT from first to M, to the second inputs of even-elements AND- NOT from {Ni + l) -ro to 2 N-th and to the input of the second element NOT, whose code is connected to the C-inputs of even triggers, and this trigger outputs are connected to the third inputs of the NAND elements, respectively, from (N + l) -ro to 2M th, and the output of each NAND element is connected to the fourth input of the NAND element with the number N +1 more modulo 2N, the drawing shows a functional on the pulse distributor circuit. The pulse distributor contains triggers 1-8, elements NOT 9 and 10, elements AND-NOT 11-26, bus 27 clock pulses, bus 28 initial installation, output buses 29-52, functional converter 53, bus 54 control, input bus 55 The pulse distributor can operate in two modes: the first mode is open, the second mode is closed. In the first mode, bus 55 is connected to the common (zero) bus. At the same time, after the initial installation via bus 28 and feeding on the bus 27 of the TaKTOBbtx sequence of pulses, the device will form 2N clock pulses of one cycle on its output tires and will return to the initial state before the next initial installation. In the second mode, the second bus 52 is connected to the bus 55 and the synchronization device operates in a cyclic mode. The device works as follows. Before starting the bus 28, the setup inputs of all the triggers are given a pulse of the initial setup. When an initial setup pulse is applied, a high potential level is set at the outputs of the flip-flops 1 and 2, and a low potential level is set at the outputs of the other triggers. At the output tires 29-44 elements AND-NOT - high level of potential. Then a bus clock sequence of 14 pulses 1 is applied to bus 27. CiscTeMa of pulses intercepting by Half-Period, eliminating the switching delay of the triggers from the duration of the output pulses, is obtained by converting the sequence of pulses F into two sequences of pulses shifted by half-cycle (HE and To) on the elements HE and 10 and synchronizing the odd triggers with a sequence,, even triggers - sequence v; r. The coincidence at the inputs of the AND-HI elements 11 and 19 of the positive pulse T1 from the output of the zigger 1, the positive pulse F of the clock sequence and the signals from the outputs of the previous elements IS-HE 18 and 26 allows you to form a negative clock pulse t equal to half the clock period pulse sequences, eliminating the effect of the trigger switching delay on the output pulse duration. Similarly, the coincidence of the positive pulse T2 from the output of the trigger 2, the positive pulse, which is formed on element of element 9 of the sequence t of pulses and signals t with the higher previous elements; AND-NOT 11 and 19 allows us to form a negative output pulse with a guaranteed clearance relative to an output pulse t t on tires 29 and 37. The output pulses are generated similarly to the pulse ti, and the clock pulses are generated similarly to the pulse tQ. Thus, on buses 29-36 and 37-44, output pulses are formed with a guaranteed, but minimum interval equal to the switching delay of one AND-NOT element. Moreover, the guaranteed interval is provided between any adjacent pulses, OD1, and the same impulses on the output buses 29 and 37, DZ and 38, etc. they have a minimal variation in duration with respect to each other, due only to the difference in switching delays of the IU elements 11 and 19, 12 and 2O, etc. In addition, on the output lines 45, 47, 49, and 51 of the flip-flops 1, 3, 5, 7, and 46, 48, 50, 52 flip-flops 2, 4, 6, and 8, there are two sequences of positive pulses equal to the period of the clock sequence of pulses, and On tires 45-52 of all triggers, a sequence of positive pulses overlapping by half a period is formed. They control the formation of pulses on the codes of AND-NOT elements 11-26, but they themselves additionally form various synchronous sequences of impulses. It should be noted that if the C-inputs of the 2, 4, 6 and 8 flip-flops feed a pulse sequence from the bus 27 instead of the one formed on the element U, this will result in spikes at the outputs of the AND-NE elements 11-26 and decrease the reliability systems controlled by this pulse distributor. I In addition to the two described main modes, an open operation mode is possible in which the input bus 55 is connected to a high level potential. In this case, after the initial installation on the output tires 29 and 37, 30 and 38, etc. pulse sequences appear, inverse with respect to the clock pulse sequence P and delayed relative to it for (N-1) half-periods, where N-n ,. measures output distributor 53 .. Managed functional converter 53 (for example, a switch) is designed to change the (software) mode of the device. The output pulses of the device are supplied to the information inputs of the functional converter 53 (a multi-bit switch with a number of bits equal to the number of flip-flops). The function converter is controlled by the code supplied to its control inputs from the device control bus 54. In this case, the pulse selected from this code from the output of the function converter (through a certain switch bit}} is fed to the input S of one of the triggers 3-8 or the input ft of one nz triggers 1-2 (the corresponding switch bit In this case, the usual sequence of pulses changes from the moment when the pulse selected by the functional converter is applied to the set input of the selected trigger. When the pulse 53 selected by means of the functional converter (for example, bus 37 pulse) is added The target setup input S of the selected trigger (for example, trigger 6) of the device generates a sequence of two pulses in the CEC-ne at each output. Pulses to the Additional installation inputs 5 or O. of various triggers using the functional converter 53, you can create various necessary number one sequence and, therefore, to program the temporary operation of the device, while maintaining the temporal characteristics of the output pulses, the claims of the distributor, containing M follower connected via D-inputs ipm repoB and 2 m serially connected elements AND-NOT, with the output of the 2N th element AND-NOT connected to the first input of the first AND-NOT element, and the code of each INE element is connected to the corresponding output bus In this case, the code of each ipurrer is connected to the second input of the corresponding AND-NOT element and the output one, the installation inputs of the triggers are connected to the initial installation bus, and the C inputs of even and odd triggers are connected separately to each other; u and so that, in order to improve temporal characteristics the source of the output signals, two elements of NOT are entered into it, the input of the first of which is connected to the third inputs of odd AND – NOT elements from the first to the N –th with the second inputs of the odd AND – NO elements from (N + l) -ro and 2N - go, and the output of the first element is NOT connected to the C inputs of odd triggers, to the third ,, ,, inputs of even AND-NOT elements from the perg, r, h of r, to the N-th, to the second inputs of even elements of AND-NOT from ( N + 1) -th to 2 N-th and to the input of the second element NOT, the output of which is connected to the C-inputs of even triggers, while the outputs are triggered „„ „„ „„ „„ „„ „,, ,,.„,, „, Gerov key to third inputs of AND-NO elements, respectively by (N + 1) th to 2N-th, and the output of each AND-NO element is connected to fourth input of AND-NO element with the number on more than N +1 modulo 2N. Sources of information taken into account in the examination 1. The author's certificate of the USSR 593314, cl. H 03 K 17/62, 1978. 2. Authors certificate of the USSR 569029, cl. H 03 K 17/62, 1977.