SU966911A1 - Device for shaping pulse equivalence function - Google Patents

Description

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The invention relates to pulsed and computing technology and can be found in pulsed and digital devices for various purposes.

A known device for forming the function of equivalence of impulse sirinal, i.e. signals whose presence is encoded 1, and the absence of signals containing magnetic memory elements (two-hole transfluxors) with the corresponding windings of the installation, readout and output windings, and analog storage.

The disadvantages of this device are the relatively large amount of rea- lization and the low speed associated with the multi-cycle mode of operation, as well as the low reliability of the result being learned.

The closest in technical terms to the invention is a device for forming an equivalence function (equivalence), containing the logical elements AND-NOT, AND-OR-NOT,. The second and second input buses f2.

A disadvantage of the known device of forming the equivalence function (equivalence) is the impossibility of processing non-identical in time position input pulse signals, which is connected with the construction of this device only on combinational logic elements. To process input signals that are not identical in time, it is necessary to increase the volume of the device due to the introduction of memory elements and the organization of push-pull synchronization, which significantly reduces noise immunity and speed.

The purpose of the invention is to increase the reliability of the functioning of the formation of a pulse function of equivalence when processing input pulse signals that are not identical in time position.

The delivered circuit is achieved by the fact that the first and second input buses, the logical element AND, the first input of which is connected to the first input bus, the first and second single vibrators and the first and second logical elements OR, and the first the input bus is connected to the first input of the first logical element OR, and the second input bus is connected to the second inputs of the logical element AND and the first logical element OR, the output of which is connected to the input of the first one-shot, the output Ktv of the second is connected to the start control input of the second one-shot, the start input of which is connected to the synchronization bus, the output of the second one-channel one is connected to the first input of the second logical element OR, the second input of which is connected to the output of the logical element And, and the second element OR is connected to output bus.

FIG. 1 shows a diagram of a device for forming a pulse function of equivalence; in fig. 2 - time diagram of his work.

The device (Fig. 1) contains log elements 1 and 2, OR, logical element 3 AND, single vibrators 4 and 5, first and second input buses 6 and 7, bus 8, synchronization, output bus 9.

In the diagram {FIG. 2) signal 10 on the sync bus (sync pulse) is shown, signal 11 on the first input bus, signal 12 on the second input bus, signal 13 on the output of the first logic element 1 OR, signal 14 on the input of the logic element 3 AND, signal 15 on the input of the one-shot 4, the signal 16 at the output of the one-shot 5, the signal 17 on the output bus 9.

The device works as follows.

In the absence of pulsed signals at both inputs 6 and 7, the single-shot 4 is fed to the control input of the single-shot 5 and sync pulse 10 by the falling edge of the single-shot 5, the output signal 16 of which goes through the logic element 2 to the output bus 9.

When a pulse signal arrives at both inputs 6 and 7, the output signal 14 of the logic element 3 through the logic element 2 arrives at the output bus 9. When a pulse signal arrives

Only one of the inputs of the output station 13 of logic element 1 snares the one-shot 4, the output of which prohibit signal 15 goes to the control input of the one-shot 5 and blocks the triggering of the single-edge 5 by the falling edge of the sync pulse 10, the signal 17 on the output bus 9 is missing.

For operation of the device, it is necessary that the accompanying input signals of the sync pulse 1O do not expire before the arrival of at least one of the input signals, any other positent of the sync pulse 10 relative to the input signals are valid (for example, recurrence of the sync pulse from the input signals), at the same time, the pulse duration formed by the one-shot 4 should be at least the maximum expected time between the beginning of the arrival of the first input signals and the end of the clock pulse.

Introduction to the device of two one-shot and logical elements OR or new communications eliminates the need for an intermediate step of storing input information as a separate functional unit - a register in the organization of synchronization mode between this device and the Source of input signals and immediately retains the property of obtaining the result of equivalence immediately after termination of the input signals. In addition, under the conditions of sufficiently distorted temporal position of the input pulse signals relative to each other and the accompanying clock, the proposed device for generating a pulse equivalence function maintains a high degree of reliability of operation.

Claims (2)

1. Authors svdedelstvo USSR №425353, cl. N OZ K 19/166, 1972. 2. Potemkin I.S. Funkpionalnye knots on potential e {1mentsy. M., Energie, p. 50. fig. 39.V,