SU792560A1 - Device for shaping pulses with programmable duration - Google Patents

Description

For example, in order to preserve the set limits of programmable duration, it is necessary to increase the pulse counter and information source, 2, where N

as n

- once aKc

rdness pulse counter.

A disadvantage of the known device is that. that the start pulse is applied to the control input of the subtracting counter, the latter being held in parallel recording of information for a time equal to the duration of the start pulse, and consequently, the formation of the device impulses occurs relative to the falling edge of the start pulse and their duration depends on the start pulse. may be less than her, i.e.

.

f - the duration of the weekend

Where

pulses; - pulse duration

M.J.

launch. Taking into account that the start-up pulses are not synchronous with the moment of the start-up of the starting impulses, the instability of the duration of the output pulses of a known device may exceed a value equal to half the period of the generator pulses.

The aim of the invention is to reduce the discreteness of the change in the duration of the pulses while simultaneously increasing the stability of the duration of the output pulses,

The goal is achieved by the fact that a pulse forming device with a programmable duration, containing an RS-trigger, the output of which is connected to the input of a pulse generator, an output connected to the input of the first element NOT, a pulse meter, whose information inputs of parallel recording are connected to the source information, the second and third elements are NOT, the element 2 is introduced. Moreover, the output of the first element is NOT connected to the first input of element 2I-OR, the second input of which is connected to the output of the additional discharge of the information source and the input of the second element NOT, the output connected to the third input of element 2I-OR, the fourth input is connected to the output of the pulse generator, A. The output element 2I-OR is connected to the counting input of a pulse counter, the output of the reverse transfer of which is connected to. the RS trigger input is inverse, the trigger output is connected to the input of the third element NOT, the output of which is connected to the control input of the counting pulse,

FIG. 1 shows a functional electrical circuit device

pulse shaping with programmable duration; in fig. 2 shows the time diagrams of his work.

The device contains RS-trigger -1, the input of which is connected to the input bus 2 of the device, and the output is connected to the input of the generator 3 pulses, the output connected to the element NOT 4, the output of which G1od is connected to the first INPUT of the element 2И-OR 5,

 and counter b pulses. The information inputs of the parallel recording of the pulse counter are connected in series with the outputs of the information source 7, the additional discharge of which is connected to the input of the HE element 8 and

the second input element 2I-OR. The third input of element 2И-OR is connected to the output of the element NOT 8, its fourth input to the output of the generator 3 impulse0, cos, and the output to the counting input of the counter of 6 pulses. The output of the reverse transfer of the pulse counter is connected to the R-input of the RS trigger, the inverse output of which is connected

from to the output bus 9 of the device and to the control input of the counter impulse, the pulse is NOT 10.

A pulse shaping device with a programmable duration operates as follows.

D in its initial state at the S input of the RS trigger 1, a single potential is suppressed, and at its output a zero potential that is fed to the input of the generator 3 and prohibits it

5 work. A single potential from the inverse output of the fiS trigger is fed to the input of the element HE 10, from the output of which zero potential flows to the output bus 9 of the device

0 and the control input of the counter 6 pulses. The pulse counter operates in the parallel-recording of information and records information received on its information.

 inputs from information source outputs

 one.

When the potential on the input device 2 changes from one to zero (the moment of the start pulse), the trigger is set to one. A single potential from its output is fed to

input of the generator 3 pulses, From the generator output of a series of rectangular pulses through the element NOT 4 enters the first input of element 2И-OR 5, From the output of the generator a series of pulses also goes to the fourth input of element 2И-OR, the third input of which receives the potential from the top element 8. Thus, element 2I-OR works as a switch of logical signals from two directions, controlled by a potential.

Claims (2)

65, so that if the output (W “of the latter is a null potential, then through the element 2И-OR to the counter), a series of rectangular impulses comes from the J3KKO and 3 impulses of the generator, and after the output of the additional the source of the information source is a single potential then to the counting input with an ePP; to the pulses through the element 2I-OR 4 units of right-angled impulses are output from the output of the HE element, shifted in phase by 180 ° with respect to the SIRI coming from the generator output pulses. A change in the phase of a series of direct coal pulses by 180 ° makes it possible to shift by. at the input of the pulse counter, a sequence of pulses, generated by the front-edge generator, relative to the 3-start pulses for a period of time equal to 1 / 2T. At the same time, from the handouts of the open (single) potential to the generator of 3 pulses, a single potential from the output of the HE element 10 is supplied to the control input of the pulse counter b, since zero potential from the inverse output of the SS-trigger 1, pulse counter, is fed to its input. starts working in subtraction mode. Upon arrival at the counting input of the pulse counter of the nth IT pulse (n is the number recorded in the counter from the source information number 7) IT sets to the zero state. In the interval p and p + 1-s4, the pulses at the output of the reverse transfer of the pulse counter establishes a zero potential, which enters the R-input of the trigger and sets it to its initial state. The zero potential from the trigger output enters the input of the generator 3 pulses and prohibits its operation, and from the inverse output of the trigger unit; a potential at the input of the element NOT 10, from - the output of which zero potential arrives at the control input of the pulse counter and converts it into parallel mode, directly recording information ehodit to its original state before the next stroke pri- momentum, bca run. Thus, on the output bus 9 of the device, a rectangular impulse is formed during one period of the starting pulse, the duration of which is determined by the period of the generator 3 and the number recorded in the information source 7. At zero potential, the output pulse length is formed - And: - t dt. whence Chg with a single potential at the output of the additional discharge n t, 01: where dT T T is the period of the pulse of the generator 3; 1lV f ch1, g f. , L; - the number written by the E PULSE COUNTER / yy about, 1, 2 ,,,. - the number stored - 3 times the source of the information source {and (taking into account the additional, its bit), HP, - discrete 5th change of the duration-. nostn. The introduction of new features of a pulse-shaping device with a programmable duration allows 31 to expand the area of its application, as the technical characteristics of the device improve, its functionality expands significantly by decreasing the discreteness of changing the duration of pulses, twice without increasing the frequency of the pulse generator and increasing the pulse counter size, the stability of the duration of the output pulses is increased, since by changing the constructive connections It is possible to eliminate the influence of the duration of the triggering pulses on the duration, the output impulse g1nost, as well as the limits of the setpoint, the duration of the pulses and are from g / 2. Reducing the discreteness of changing the duration by half is especially effective when working at high frequencies the elementary base on which the device is built, and does not require a transition to a faster speed base, which is often impossible due to the limited speed limits of the element base, we produce domestic and foreign industry, the invention can be used in control and technological automatic equipment used to configure and control nodes and blocks of control computing systems ASBT-M, SM computers with increasing technical capabilities of o6opj, which will increase the range of nposepHeNbix devices, The invention of the Pulse Forming Device with programmed-duration 1, containing FIS-trigger, the output of which is connected to the input of the pulse generator, the output of which is connected to the INPUT of the first element NOT, the pulse counter, the information inputs of the parallel recording of which are connected in series with the outputs of the information source, the second and third elements are NOT that, in order to reduce discreteness of changing the pulse duration while increasing the stability of the duration of the output pulses, element 2I-OR is introduced into it, and the output of the first element is NOT connected to the first input of element 2I-OR, the second input of which is connected to the output of additional sp and the information source and the input of the second NOT member whose output is connected to the third input 2I-OR element. the fourth input of which is connected to the output of the pulse generator, and the output of element 2И-OR is connected to the counter input of the pulse counter, the return transfer output of which is connected to the RS input of the trigger, the inverse output of which is not connected to the control input of the pulse counter via the third element . Sources of information taken into account in the examination 1, USSR author's certificate And 545075, cl. H 03 K 5/153, 08.25.75. 2. Waiting multivibrator with programmable pulse duration, Electronics, vol. 48, no. 12, 1975, with. 56. Kyipian tire 1-1 Yad) untt) cl VyhoZ Gnertora, - Ts Ts Tsi U U and L- ufinyAhcoS S..OS,. “, ... ///: Jl Lrm JlA r ™ ljm inJ1J SxoSbi (yuzm Cuemi / ukcl VhvZ i - 01 and the reader. Additional source of data information dsod o5ratygo. carry  .-one shma Iggsh.plpll U .2