SU1485389A2 - Amplitude-time analyzer - Google Patents

Description

The invention relates to a pulse technique and can be used to build amplitude-time analyzers of pulse signals and selection devices. The purpose of the invention is to increase the reliable

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These results of the amplitude-time analysis of the input pulse signals are achieved by eliminating the possibility of false positives of the amplitude-time analyzer.

The drawing shows the threshold elements 1,2 and 3, the generator 4 sawtooth voltage, time block 5, the element OR NOT 6, the inverters 7 and 13, the front side former 8, the triggers 9, 11 and 19, the rear front side former, element And 12, input 14 and output 15 pins, sources 16, - 17 and 18 of the reference voltage. The proposed amplitude-time analyzer prevents distortion of the output information due to the presence of signals at the input, the amplitudes of which are not included in the specified allowable interval. 2 Il.

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SS 1485389 A 2

'1485389

The invention relates to a pulse technique, can be used to build the amplitude-time analyzers, pulse signals $ and selection devices and is an improvement of the invention according to the author. No. 1413714.

The purpose of the invention is to increase the reliability of the result of the amplitude-time analysis of the input pulse signals by eliminating the possibility of false alarms of the device.

Figure 1 shows the structural 15 scheme of the amplitude-time analyzer; in fig. 2 - block diagram of the sawtooth generator.

The amplitude-time analyzer 20 contains the first 1, second 2 and third 3 threshold elements, a sawtooth voltage generator 4, a time reference unit 5, an OR-NOT 6 element, a first inverter 7, a forward front driver 8, a first trigger 9, a driver 10 the back of the front, the second trigger 11, the element And 12, the second inverter 13, the input 14 and the output 15 tires, the first 16, the second 17 and the third 18 sources of reference voltage, the third trigger 19.

The input bus 14 is connected to the first inputs of the threshold elements 1 3, the second inputs of which are connected 35 respectively to the sources 16-18. The output of the first threshold element 1 through the driver 10 is connected to the first input of the element I 12, and through the first inverter 7 to the first input of the generator 4, the C input of the first trigger 9 and the input of the driver 8, the output of which is connected to the K inputs of the first 9, second 11 and third 19 triggers. The output of the second threshold element 2 is connected to the C-input of the second trigger 11, the Ώ-input of which is connected to the 0-input of the third trigger 19 and a positive power rail. The output of the third threshold element 3 through the second inverter 13 is connected to the C input of the third trigger 19 and the second input of the generator 4, the output of which is connected to the input of the timed-run block 5, the first and $$ second outputs of which are connected to the L input of the first trigger 9. Direct outputs the first 9 and third 19 triggers and the inverse output of the second

the trigger 11 is connected respectively to the second, fourth and third inputs of the element And 12, the output of which is connected to the output bus 15.

The generator 4 contains the first 20 and second 21 current generators, the outputs of which are connected to the input of the repeater 22 * through a parallel-connected storage capacitor 24 and a switch 23 with a common bus, the control input of the first generator 20 being the second input of the generator 4, the control input of the switch 23 - first the input of the generator 4, and the output of the repeater 22 - the output of the generator 4.

Time-setting unit 5 comprises two separate comparator with adjustable thresholds, and _n0 r.4I 11 _to p. ₅ outputs which form the outputs of the time block 5.

The analyzer works as follows.

The analyzed signal is fed to the inputs of the threshold elements 1-3, and the corresponding threshold levels of the last two threshold elements And _then . _g and P _then . ₅ define a zone of tolerance of the input signal in amplitude ^{(Ππορ.2 ϊ 'υ σορ.3> υ} /7ίρ.ι>. If the input value is within the predetermined tolerance amplitude variations field H _x f, and _Th2 ^ _l

then the triggering of the first threshold element 1 and the generation of the 8th leading edge of the signal by the shaper initially causes the triggers 9,11 and 19 to zero, while the second threshold element 2 does not generate a pulse at the input, the second trigger 11 remains in the zero state, which does not prevent the passage signal output device through the element And 12. On the leading edge of the input signal, there is a sequential operation of the first 1 and Third 3 threshold elements. The signals from the outputs of the threshold elements 1 and 3 are fed to the inputs of the generator 4 through the inverters 7 and 13, respectively. In the initial state before the arrival of the signal and _x , when the signals at the outputs of the elements 3 and 1 are missing, current generators 20 and 21 provide currents I and 1 _g , which are summed and flow to the common bus through the public key 23. At the output of the repeater 22, there is no signal. Triggering of the threshold element 1 to ne1485389

the front edge of the input signal 1Ι _χ leads to the closing of the key 23 and the charging of the capacitor 24 by the current I „+ X,

At the output of the repeater 22 · there is a saw-tooth increasing voltage proportional to the sum of the currents X, ⁺ ? _g · Intersection front edge of the input signal _x and the threshold level _and on p. _l threshold element 3 leads to the appearance at its output of a signal arriving at the second input of the generator 4 through the inverter 13 and disconnecting the generator 20. At the output of the sawtooth voltage generator 4, the increase in the signal becomes proportional to T ^, which continues until the moment of reverse intersection of the pulse decay P „ _op} . Then again switched generator 20 current and increase the output voltage is proportional to the sum of currents X, + X _g, at the time of reverse crossing of the input signal decay value and _then the first threshold element 1 occur his return to the original state and opening the switch 23 that provides a fast discharge of the capacitor 24 and the end of generation of the sawtooth voltage at the output of the repeater 22. When the ratio of the current values and the threshold voltages of the n · expressed _pore / X1 _U0 ⁼ r.e

= '(X, + _Xg ) / X ₂ , the amplitude value of the sawtooth voltage is proportional to the duration of the input signals, taken at the base.

With the generator 4 outputs the generated sawtooth voltage is applied to time-setting unit 5, which is a two threshold element with a threshold level and _{then p, then} P. £. At the intersection of the sawtooth voltage values Pn _about p.4. and and " _{op 5} at the output of the element OR-NK 6 are formed, respectively, the front and rear edges of the output pulse. Values P _lorl . and _{ENT 5} define the limits of the field tolerance for changing the duration of input signals ·

If the duration of the input signals is in the specified tolerance field £ k e x It is the leading edge of the pulse from the output of the element OR NOT 6 is formed on the falling edge of the pulse of the generator 4. When the pulse from the output of element 6 is not formed, the trigger 9 remains in the zero state and the signal on device output does not appear. When the first trigger 9 is set to one state, the falling edge

5 signals from the output of the first inverter 7 If C _x >, then the formation

the back edge of the pulse from the output of element 6 ends before the appearance of the back edge of the pulse from the output of the inverter 7, while the trigger 9 is not set to one, the pulse at the output of the element 12 is absent.

15 The presence of the input signal AND * in the amplitude tolerance zone causes the trigger 19 to be set to one state by a pulse from the output of the inverter 13 through its C input, which

20 allows the passage of signals through the element And 12.

The shaper 10 on the trailing edge of the pulse from the threshold element generates a signal that passes to the output of the device through the logical element 12, subject to passing the parameters of the input signal in the specified tolerance zones.

With input signals, the amplitude

20 which exceeds the threshold level and „ _0р2 , a _pulse is formed at the output of the threshold element 2, the leading edge of which the second trigger 11 translates into a single state, and zero

^{35 the} potential of its inverse output blocks the passage of signals to the output of the device through the logical element I 1 2.

₄₀ If the amplitude of the input signal • and _x does not exceed the value ϋ _{πορ4 of the} first threshold element 1, then the shaper 10 does not generate a signal and there is no ₄₅ on the output bus 15.

When the amplitude of the input signal and "corresponding to the interthreshold interval <and _then ,,; Supports.?) "Trigger

50 19 remains in the zero state, so blocking the passage of signals through the element 12.

Thus, in the amplitude-time analyzer, the output information is distorted due to the presence of signals at the device input, whose amplitudes are not included in the specified tolerance interval.

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Claims (1)

Claim Amplitude-time analyzer according to avt.sv, No. 1413714, characterized in that, in order to increase the reliability, an additional trigger has been introduced, the U-input of which is connected. \ To the positive bus eight power supply, its C-input is connected to the output of the second inverter and the second generator input a sawtooth image voltage, and the K-input is connected to the K-inputs of the first two triggers, and the direct output of the additional trigger is connected to the fourth input of the And element, Fig 2