SU781801A1 - Time-spaced pulse shaper - Google Patents

Description

(54) FORMER OF PULSES MOVED

one

The invention relates to computing and can be used to generate synchronizing pulses of sequences.

For the operation of computer facilities, two series of synchronization signals are often used, the pulses of which overlap in time and are shifted relative to each other.

A device is known for producing pulses that are shifted in time, containing triggers connected in a ring, and valves at the installation inputs of the flip-flops 1.

The lack of such devices is low stability. In order to obtain the required timing diagram, only one logical unit must constantly circulate at the outputs of the triggers in the ring. If as a result of a failure in the ring more than one unit is recorded, the timing diagram at the outputs of the device will be distorted.

The closest to the proposed device, which allows to obtain two series of overlapping pulses that are shifted in time, contains three triggers with counting inputs, with the outputs of the first trigger connected to DURING TIME

counting input of the second and third triggers. When entering the counting input of the first trigger pulses from the generator, the outputs of the second and

5 of the third trigger, the overlapping pulses are shifted in time 2.

However, this device also has a low stability. As a result, computational triggers due to power surge or impulse noise, the outputs / outputs from which leading and lagging sync signals are removed can be changed.

15 places.

The purpose of the invention is to increase the stability of the work.

 This goal is achieved by the fact that the pulse shaper shifted in

20 time, containing the first trigger, the counting input of which is connected to the input of the imaging unit, contains the second trigger, the element NOT, two AND elements, the installation inputs of the second

Claims (2)

25 flip-flops are connected respectively to the outputs of the first and second elements I, the first inputs of which are connected to the direct and inverse outputs of the first trigger, the second inputs of the element 30 XQB And connected to the outputs of the element HE, the input of which is connected to the input of the pulse shaper. Figure 1 shows the diagram of the former; Fig. 2 shows a temporal diagram of operation. The shaper contains a trigger 1 with a counting input, element 2 NOT, elements 3,4 I, trigger 5 with setting inputs, input b of the device, outputs 7 and 8. The input b of the device is connected to the net input of trigger 1 and the input of element 2 NOT, Direct trigger output 1 is connected to the first input of element 3 AND, the trigger output of trigger 1 is connected to the first input of element 4 I. The second inputs of elements 3.4 And is connected to the output of element 2 NOT, the output of element 3 And is connected to the installation input in the unit of the trigger 5, the output of the element 4I is connected to the input of the installation in zero of the trigger 5. Output Odes 7, 8 are connected to the direct outputs of the flip-flops 1, 5 from output 7 and are removed from the advancing series of sync pulses, and from output 8 to the lagging series of sync pulses. The shaper works as follows. Upon arrival at the input b of pulses (Fig. 2a), the outputs of the trigger 1 appear signals, the duration of which is equal to the period of the clock pulses (Fig.2). When trigger 1 is in the unit state, on the falling edge of the input clock pulse, trigger 5 is set to one by the signal from the output of element 3 I. When trigger 1 is in the zero state, on the falling edge of the input clock pulse through element 4 and the trigger 5 is set to the zero state (Figure 2d). Trigger outputs are removed from the single outputs (1, 5), trigger 1 output is removed. The synchronization sequence (Fig.26) is removed, and the lagging sequence of sync pulses (Figure 2d) is output from the trigger output (fig.2g). triggers to the zero state with a special signal. Ec; if during the operation a random failure of one of the counting triggers of the second stage occurs, the value of the outputs may change: at the output, from which it was removed The efficiency of the leading pulses appears to be a sequence of lagging pulses, which will lead to a stable failure of the nodes, using these synchronizing signals 11 in the proposed device. Therefore, the proposed device does not need special signals for setting the triggers to a certain state and is not critical to the failure status of the triggers. The invention The shaper of impulses shifted in time, containing the first trigger, the counting input of which is connected to the shaper input, which is characterized by the fact that it contains the second trigger, the element NOT, two elements AND, the installation inputs of the second trigger, respectively. with the outputs of the first and second elements And, the first inputs of which are connected respectively to the direct and inverse outputs of the first trigger, the second inputs of the elements And are connected to the outputs of the element NO, the input of which o connected to the shaper input. Sources of information taken into account during the examination 1. USSR author's certificate 223454, cl. G 06 F 1/04, 1967. 2.Bukreev I.N. and others. Microelectronic circuits of digital devices. M., Sov.radio, 1975, p. 277, fig. 6.12 (prototype). 781801