SU1415435A2 - Analyzer of pulse edge duration - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automation, measurement technology and pulse signal analysis systems Uti.3 in use. The purpose of the invention is to expand the functionality that is achieved by providing additional analysis of pulses whose front duration exceeds a certain minimum value. The device contains a high discriminator 1 low level discriminator 2, input bus 3, threshold voltage bus 4, generators 6 and 7 sawtooth voltage, computer rators 8 and 9, bus 10 threshold voltage, triggers 11 and 16, output bus 12, input 17 Reset device, element OR 18. In addition, comparators 13 and 14i were entered into the device (bus 15 an additional threshold voltage of The permissible limits for the duration of the fronts of the pulses being analyzed are determined from the mathematical relationship given in the description of the invention. 1 ill. (L, ate 4 CO sd gh l. Reset

Description

The invention relates to new technology, can be used in automation, ICT and analysis systems and pulsed signals and is an improvement of the known analyzer according to the model no. 1205287с

The purpose of the invention is the expansion of functional and functional capabilities due to the availability of additional analysis of pulses, the duration of which front exceeds a certain minimum value, Tov, the object determines the presence of a pulse

  lain -tpp - M01ICC

The drawing shows a structural diagram of the analyzer

/ The analyzer contains a high-level discriminator 1 and a low fauv discriminator 2, the first inputs of which are combined and connected to the input bus 3 of the device. The second input of the high-level discriminator 1 is connected to the bus 4 of the high threshold voltage J and the second input of the low faun warning device 2 with bus 5 threshold voltage low level. The outputs of the discriminators of high 1 and low 2 Levels are connected respectively to the inputs of the first 6 and second 7 sawtooth voltage generators, the outputs of which are connected respectively to the non-inverting inputs of the first 8 and second 9 compressors, the inverting inputs of which are combined and connected to the bus 1 threshold voltage, and the outputs are connected respectively to the D-input and C-input of the first trigger 11, the output of which is connected to the output bus 12 of the device.

The outputs of the first 6 and second 7 generators of the sawtooth voltage are connected to the non-inverting inputs of the third 13 and fourth 14 comparators, respectively, the inverting inputs of which are combined and connected to the film 15 of the additional threshold voltage, and the outputs are connected respectively to the D input and the C input of the second trigger 16, the R-input of which is connected to the input 17 Reset device. The output of the second trigger 16 is connected to the first input of the RSHI element 18 whose second input is connected} to the input 17 of the device Reset, and the output to the R input of the first trigger 11,

The pulse front analyzer operates in the following 1 way.

The analyzed input signal Ug is fed to the discriminator inputs of high 1 and low 2 levels, which have threshold voltages and rates of up U1, respectively. The signals from the outputs of discriminators 1 and 2 control the operation of the corresponding generators 6 and 7 of the sawtooth voltage. At time t corresponding to the front intersection of the signal of the threshold voltage OPOR c, a sawtooth voltage Up begins to form, with a rise rate V, at the time time t, corresponding to the intersection of the front of the signal under investigation, into the saw-tooth voltage with the rate of increase of V, and VV ,, The signals and, and and from the generators 6 and 7 of the saw-tooth voltage are fed respectively to the computer inputs 8, 9 and 13, 14 aarators A threshold voltage is applied to the second inputs of the comparators 8 and 9, which determines the maximum duration of the front of the signal under investigation; the second inputs of the comparators 13 and 14 are the threshold voltage that determines the minimum duration of the front of the signal under investigation t, :

FA (IN

nopi bt (;

and

pore

 et

fTMOlUC

with V, - Ug where tg const „

The moments of time t and t coincide - 1w sawtooth voltage generator 7 with the threshold voltage Uppp and Unop, are constant and correspond to the beginning and end of the analyzed time interval. Time tj. and t coincidence of the sawtooth voltage of the generator 6 and threshold voltages and vary depending on the duration of the front t (p and may take values of respectively more or less t and

If the duration of the front of the signal under study 11 is within

 min

then after-fMatc comparators are triggered

14 and 13, and then the Comparators B and 9 "Since the comparator 14 is triggered

314

before the comparator 13, the trigger 16 remains in the initial state and the trigger 11 is set to 1. This means that the duration of the front of the signal under investigation is

within given limits If to,; t, „.., Tmchi

This is triggered by the comparator 13, and then the comparator 14 and the trigger 16 is set to 1, thereby prohibiting the trigger T1 through the element OR 18. If tq, the fmax comparator 9 will work before the comparator 8, and the trigger 11 remains in the initial state, B the initial state of the analyzer is driven by an external Reset signal.

Thus, the analyzer allows you to analyze the duration of the front of the ISS: 1speed signals within the specified limits t, ° greatly expands its area of application

35 Formula

the invention

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five

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The length analyzer of the pulse front according to aut., No. 1205287, distinguishes the NS by the fact that, in order to expand its functionality, an additional threshold voltage bus, the third and fourth comparators are introduced into it, the noninverting inputs of which are connected respectively to the outputs of the first and the second sawtooth voltage generators, inverting the inputs - with an additional bus of the second threshold voltage, the second trigger, the D-input of which is connected to the output of the third comparator, the C-input - with the output of the fourth comparator, R- input - with input Device reset, the OR element, the first input of which is connected to the output of the second trigger, while the R input of the first trigger is connected to the bus Reset through the OR element.

Claims (1)

Claim The pulse front duration analyzer according to ed. St. 1205287, characterized in that, in order to expand the functionality, an additional threshold voltage bus is introduced into it, the third and fourth comparators, the non-inverting inputs of which are connected respectively to the outputs of the first and second sawtooth generators, inverting inputs with an additional bus of the second threshold voltage, a second trigger, the D-input of which is connected to the output of the third comparator, the C-input - with the output of the fourth comparator, R-input with the input Reset device, an OR element, the first input of which is connected to the output of the second trigger, while the R-input of the first trigger is connected to the Reset bus through the OR element.