SU785983A2 - Pulse selector - Google Patents

Description

one

The invention relates to a pulse technique and can be used in decoding devices of instrumentation and devices for statistical angling of equipment and devices for statistical analysis.

Known pulse selector for the main auth. Swid.O 666638, which. contains a reversible counter, equipped with two content signalizers, two AND elements, NOT, OR elements, delay element and generator.:; The pulses of the reference frequency, the output of which through the second and third element I is connected to the inputs of the reversible counter, the outputs of which through the signalizers are connected to the first input of the first element NOT and the element OR, the second input of which is connected to the output of the element NO, the element NO at the output, the second input of which connected to the second input of the second element And through the element. delays - to the second input of the first element And to the input bus.

This pulse selector is characterized by low reliability. For example, if the sum of the durations of the signals received at the input of the selected

the torus for the time interval from -L-T to i goes out of the permissible limits, then the reproduction of the sequence of signals on the output stops

5 selectors. At the same time, a part of the signals, the sum of which is within the permissible limits, passes at this moment in time through the pin element and is not reproduced at the output.

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

This is achieved by the fact that in a known device according to auth.St. № 666638, containing a reversible counter,

15 equipped with two alarms

contents, two elements AND, elements NOT, NO, OR, a delay element and a pulse generator of the reference frequency, the output of which through the second

20 and the third elements AND connected to the inputs of the reversible counter, the outputs of which through the signaling devices are connected to the first inputs of the first element NOT and the element OR, the second input

25 cr-mountain is connected to the output of the element NOT, the first input of the element is NO. at the output it is connected to the second input of the second element And through the element of delay - X to the second input of the first

30.I element and input bus into it

between the output of the OR element and the control input of the NO element, a series-connected additional element NOT, an additional delay element and a trigger are introduced, the second input of which is connected to the reset input of the additional delay element and to the input of the OR element.

The drawing shows a structural electrical pulse selector circuit ..

The device contains a generator of 1 pulses of the reference frequency, the elements, And 2 and 3, the element 4 delayed; delay element 5, additional counter 6 pulses) reversible counter, equipped with content alarms 7 and 8, elements NOT 9, element NO 10, element NO 11, additional element OR 12 and trigger 13. The device input bus is connected to the input of element 4 and through the element AND 2 - to the summing input of the counter 6. The output of the delay element 4 is connected to the signal input of the element 11 and through the element 3 - to the subtractive input of the counter 6. Other inputs of the elements 2 and 2 are connected to the output of the generator 1. The output of the indicator 7 of the content of the counter b is connectedThrough the element NO 9 to the first input of the element OR 12, another INPUT of which is connected to the output of the signaling device 8. The output of the element OR i2 is connected to the first input of the trigger 13, to the reset input of the delay element 5 and through the element NOT 10 to the signal input of the delay element 5, output which is connected to the second input of the trigger 13. The output of the trigger 13 is connected to the control input of the element NO 11.

The device works as follows.

The input rectangular pulse signals are fed to the first input of element 2, to the second input of which the counting pulses of generator 1 are supplied. In this case, the input signals of duration t are converted into counting pulses, the number of which is proportional to the duration of the corresponding signals. These pulses are fed to the summing input of the counter 6.

In parallel, input signals are delayed by a delay element 4 at time T. The delayed signals are converted by the generator 1 and element 3 into bursts of estimated pulses, the number of which in each burst is proportional to the duration of the corresponding signals. Counting pulses from the output of element 3 are fed to the subtracting input of counter b, the contents of which at the current time t is proportional to the sum of the durations of the input signals.

received at the input of the selector for the time interval (t-T, t).

The signaling devices 7 and 8 operate in such a way that when the contents of the counter 6 exceed a certain value previously set for each signaling device with the help of switches (no aio shows in the drawing), a high potential appears at the output of the corresponding signaling device. In this case, a high potential appears at the output of the signaling device 7 when the contents of counter 6 exceed a number corresponding to the minimum sum of the durations d of the selected sequence pulses during the time interval T, and a high potential appears at the output of the signaling device 8 when the contents of counter b exceed the number corresponding to the maximum sum of the durations p of the selected pulses for the time interval T.

When the selector works, four cases are possible.

1.If the sum of the durations of the signals received at the input of the selector for the time interval from t - T to i,

is in the range of permissible,

m Ie satisfies condition d 12.

i-l

THAT at the output of the detector 7 there is a high potential, and at the output of the detector 8 - a low potential. In this case, the output of element 9, as well as the output of element 12, will have a low potential, and the trigger 13 will be in the state O and its output voltage will not prevent the input signal, delayed by element 4, from passing through the element 11 to the output selector.

2.If the sum of the durations of the signals received at the input of the selector

Over the time interval from t - t to t, it will be less than the established prew

la minimum, i.e. eleven:: ,

THEN at the output of the alarm device 7, the potential is low, which is converted by means of the HE element 9 to a high potential, which is supplied through the OR element 12 to the input of the HE 10 element, to the reset input of the delay element 5 and to the first trigger input 13. In this case, the 5 the delays are cleared, and the trigger 13 does not change its state, since it operates on both inputs only from low potentials. From the output of the element NOT 10, a low potential is fed to the input of the element 5 of the delay, where it is delayed by the time T. If during the interval T the high potential does not reach the reset input of the delay element 5, then at its output there is a low potential that sets the trigger 13 to the state

1. At the same time, the output voltage of the trigger 13 closes the NO 11 element and there will be no signal at the output of the selector ..

3. If the sum of the pulse durations arriving at the input of the device during the interval from -fc - t to fc becomes greater than the set maximum limit, then at the output of the signaling device 8 a high potential that passed the OR 12 element goes to the reset input the delay element 5 will clear it, and in addition, the state of the trigger 13 will not change, it will go through the element NOT 10 to the input of the delay element 5.

4. If during the interval T the high potential does not reach the reset input of the delay element 5, then at its output there is a low potential that sets trigger 13 to state 1. The output voltage of trigger 13 closes the element NO 11 and on. output selector signal will be absent.

Thus, the introduction of new connections of the HE element, the delay element and the trigger favorably distinguishes this technical solution from the well-known one, since the reliability of the selection is increased due to the fact that when the sum of the durations of the input signals of the pulse selector goes over the time interval from t - T to b from the permissible limits, the element NO 11 transmits signals from the output of the element 4 to the output delay of the selector during the time interval t,

Claims (1)

1. USSR author's certificate No. 666638, cl. H 03 K 5/18, No. 2451629, 08.26.77.