SU725208A1 - Pulse train shaper - Google Patents

Description

(54) FORMER OF PULSE SEQUENCE

one

The invention relates to a pulse technique and can be used in a measuring and supervisory technique.

A device for generating a sequence of pulses is known, comprising generators, threshold control circuits, pulse-voltage converters, a switch, one-shot, prohibition elements, OR, coincidence, majority elements 1.

A disadvantage of this device is its relatively low reliability, determined by the complexity of the device due to the use of a comparative circuit. phase.i

 The closest in technical essence to the proposed offer is a pulse shaper comprising two sources of sinusoidal oscillation, a switch, an attenuator, adders, form-g. rovers, element or 2.

However, this shaper is also

. insufficiently reliable, since with a constant decrease for some reason, the amplitudes of one of the sources of sinusoidal oscillation up to J. the amplitudes of the signal of the second source, with a phase shift between the signals of the sources equal to 3/4 I, the signal at the output of the device is equal to NU.S.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that, in the driver, a sequence of pulses containing sources of sinusoidal oscillations whose outputs are connected via a switch to the first inputs of the adders and to the input of the attenuator, respectively, the output of the at5 of the tenuator is connected to the BTOIXJM input of the first adder and through the phase shifter to the second input of the second adder , the outputs of the adders are connected to the inputs of the pulse drivers, respectively, the output

0 second, the pulse former is connected to the first input of the OR element, the AND element and the comparator are entered, the inputs of which are connected to the outputs

There are 5 sources of sinusoidal oscillations, and the output is connected to the first input of the element I, the second input of which is connected to the output of the first driver of pulses, the output of the output element AND is connected to the second input of the element OR.

The drawing shows the functional diagram of the pulse shaper.

The shaper contains sources of 1.2 sinusoidal oscillations, switch 3, adders 4.5, attenuator b, phase shifter 7, shapers 8.9 pulses, element OR 10, element 11 and 11, comparator 12.

The pulse shaper operates as follows. The corresponding inputs of the adder 4 receive signals xsin and 1/2 sin (+ .f), respectively, of the sources 1 and 2 of the main and backup sinusoidal oscillations with an amplitude ratio of about 2/1, since the signal of the source 2 of the backup is additionally attenuated by a factor of 2 attenuator 6. The resulting signal at the output of the adder 4 has a sinusoidal shape. The phase of this signal at x 1 is slightly different from the phase of source I.

The signals from the output of the summer 4 are converted into a pulse sequence by means of a pulse shaper 8. This pulse sequence arrives at the first input of element 11. The signals of sources of 1.2 sinusoidal oscillations, respectively; "Iiiti3 and: Sin (ifbcT n & ioT as on the inputs of the switch 3, the inputs of the comparator 12,

one

If f. . then the signal 1 is formed at the output of the signal comparator 12. This signal is fed to the second input of the AND 1-1 element. Therefore, when x. as a result of coinciding with the first initial and second inputs of the element AND 11 at the output of this element, connected to the first input of the element OR 10, a periodic signal takes place, which is a signal

Xi / nwt -j - i n ()

subjected to restriction. If, then, the comparator 12 generates a signal at the output of 0. As a result, the signals at the inputs of the element 11 cease to coincide and the signal at the first input of the element OR 10 is not received; The chain consisting of the adder 5 and the former 9, regardless of the amplitudes x of the signal of the source of 1 sinusoidal oscillations ,. generates at the output, connected to the second input of the element OR 10, a periodic signal, which is a signal amplified up to the compartment.

 4- | -6iM (

Thus, in the proposed device, the signal at the output of the element OR 10 is a signal U (t), subjected to a limitation, where

iH) intJt --j-, r () i-COi (iJti- fllpH X

2DT

W) 1. , () PRE) (

2 ulv-ht 2, I G ./

Since when changing x from 1 to O and any values of t U (t) i О, the signal at the output of the imager does not disappear with a gradual exit from source 1 (decreasing x from 1 to 0), whatever the phase Shift between signals sources 1,2 sinusoidal signals.

Thus, the proposed shaper provides a continuous pulse signal at the output even when, in a known device, the signal disappears when

Therefore, the proposed pulse shaper operates with increased reliability compared to the known

0 devices.

Claims (2)

The invention The shaper of the pulse train, the contents of the source of sinusoidal oscillations, the outputs of which through the switch are connected to the first inputs of the adders and to the input of the attenuator, respectively, the output of the attenuator is connected to the secondary input of the first adder and through the phase shifter to the second 0 input of the second cyMM iTopa, the outputs of the adders are connected to the inputs of the pulse formers respectively, the output of the second pulse former is connected to the first With the input of the OR element, it is also different from the fact that, in order to increase reliability, an AND element and a comparator are introduced into it, the inputs of which are connected to the outputs of the sources of sinusoidal oscillations,  and yhod. connected to the first input of the ground And, the second input of which is connected to the output of the first form of the pulses, the output of the element AND COUNTER With the second input of the element IL. Sources of information taken during the examination I 1. USSR Author's Certificate No. 321951, cl. H 03 K 19/24, 17.02.69. l 2. USSR author's certificate No. 527011, cl. H 03 K 3/00, 19 ..