SU630739A2 - Pulse duration selector - Google Patents

Description

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The invention relates to automation and pulse technology.

According to the main author. St. No. 558394 is known pulse selector, the duration of which t exceeds the specified value TO.

The known selector contains a pulse generator, two triggers, three AND elements, an NOT element, an OR element, and a scaling circuit.

However, the known selector has a limited range of changes in the duration of selectable imiuls, the duration of which is reproduced without distortion at the output of the selector. If the duration of the input pulse satisfies the condition, then a pulse with a duration equal to 2w is formed at the output of the selector.

The aim of the invention is to extend the range of variation of the duration of selectable pulses reproduced at the output of the selector without distorting the duration to the region of maximum values.

This goal is achieved by the fact that a pulse selector has a duration, containing an impulse generator, two triggers, three AND elements, an NOT element, an OR element and a scaling circuit, and an NO element is connected via a signal input to the output of the first AND element, using an equalizing input single exit first

trigger, and the output - to the second input of the element ILR1.

The drawing shows a structural electrical pulse selector circuit for duration.

The selector contains a generator of 1 pulses, elements AND 2-4, element NOT 5, element OR 6, scaling circuit 7, triggers 8 and 9, and element NO 10. The input bargain AND selector is connected to one of the inputs of the element II 2 and to the input of the element NOT 5, the output of which is connected to the reset value of the scaling circuit 7 and to one of the inputs of the element H 4. The output of the generator 1 is connected to the other inputs of the AND 2 element and the AND 3 element. The output of the AND 2 element is connected through the element NO 10 to one of the inputs of the OR element 6, another input of which is connected to the output of the element AND 3. The output of the element OR 6 nodkl Yuchen through recalculation circuit 7 to the counting input of the trigger 8. Single trigger output

8 is the output of the device and is connected directly to the control input of the element NO 10 and through the element I 4- to the single input of the trigger 9, the zero input of which is connected to the zero output of the trigger 8. Single output of the thrunger

9 connected to one of the inputs of the element And 3.

The pulse selector works as follows.

 The rectangular impulse arrives at the PA-input-element I 2, with which it fills with the counting pulses 5 of the generator 1. Thus, the input signal is converted into pimples, the number of which is of the sigpal duration.

In the initial position, the triggers 8 and 9 10 are in the bullet position. At the same time, the control input of the element NO 10 is absent a prohibiting signal and pulses from the output of the element AND 2 and through the elements NO 10 and OR 6 to the input 15 of the conversion circuit 7, the conversion factor N of which is proportional to the selection threshold TO.

If the duration of the input signal t satisfies the condition, then the pulse 20 at the output of the scaling circuit 7 is absent. The rear edge of the input pulse enters through the element NOT 5 pa input of the reset value of the scaling circuit 7 and zeroes it.

If the duration of the input signal T 25 satisfies the condition, then after the arrival of the L counting pulses at the input of the counting circuit 7, a pulse appears at its output, which sets the trigger 8 to the single state. From this moment on, the ZP chpnaet produces a pulse on the output of the selector, and the prohibitive direc tion of the control input of the NO 10 element is applied. In this case, the counting pulses will stop flowing on the input of the counting circuit 7. , at the other entrance, a single potential

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output trigger 8, sets the trigger 9 to the state "1. From this moment, from the output of the trigger 9, a single signal is fed to one of the inputs of the element 3 and the countable mixers of the heater 1 enter through the element 3 and the element OR 6 to the input of the scoring circuit. After P / N P / O pulses are received on the input of the switchboard circuit 7, on the output of the pulse, it arrives at the input of the trigger 8 and transfers it to the zero state. This will complete the formation at the output of the pulse selector, the duration of which is the rapa of the duration of the input pulse.

One change of the state of the trigger 8 causes the spin of the trigger 9 to be in a bullet state, which leads to the locking of the element 3.

Thus, by focussing the formation of a pulse at the output of the selector, scaling circuit 7 and the triggers 8 and 9 are in a bullet state and the selector is again ready to accept the next pulse.

Claims (1)

Invention Formula Pulse selector by duration aut. St. N ° 558394, which means that, in order to expand the range of changes in the duration of selectable pulses reproduced at the output of the selector without distorting the duration into the range of maximum effects, NO element is added, connected by a signal input to the output the first element AND, the control input to the single output of the first trigger, and the output to the second input of the OR element.