SU496671A1 - Pulse Analyzer Attachment - Google Patents

Description

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The invention relates to a pulse technique and can be used with a pulse analyzer to measure the probability distribution of time intervals, for example, when following a cloud process in meteorology.

A known prefix to a pulse analyzer contains a trigger, differentiating circuits, an electronic key, and a pulse shaper.

The purpose of the invention is to expand the diaszone of the measured time intervals between pulses of a random sequence.

For this, the trigger outputs through differentiating circuits are connected to the Start and Stop signal conditioners, respectively, while the trigger output connected to the Start signal generator is shunted by a key connected to the control of your input to the output of the blocking circuit, the input of which is connected to the input fs worldr signal, Start

FIG. 1 shows a block diagram of the proposed device; in fig. 2 - time

charts on the operation of the device; in fig. 3 - schematic diagram of the device.

The prefix to the pulse analyzer contains a trigger 1, one of the arms of which through a differentiating circuit 2 n the former of 3 signals Stop is connected to the input Stop of the pulse analyzer. The second trigger arm through the differentiation circuit 4 and the driver 5 of the Start signals are connected to the Start input of the pulse analyzer, an electronic switch 6 is connected to the same shoulder, connected to the interlock circuit 7, which in turn is connected to the output of the differentiating circuit 4.

The time diagrams show: gv-ell / tea pulse sequence arriving at the trigger input 1 of the proposed device, 9 - voltage drop across the trigger arm, which is connected

; but through differentiating circuit 4 and shaper 5 start signals with input

Start / Pulse Analyzer; 10 - them, voltage pulses, coming to the Start input of the pulse analyzer; 11 — voltage jumps on the trigger arm connected to the differentiating circuit 2; 12 voltage pulses arriving at the inlet of the pulse analyzer; 13 - imputations of interlocking, impacted by the blocking circuit 7. The circuit diagram of the proposed device contains a flip-flop 1 on transistors 14 and 15. One arm of this flip-flop is connected to a differentiating circuit 2, which consists of capacitance 16 and a resistor 17. Pulse generator 3 consists of inverter on the transistor 18 of the threshold device circuit on the tunnel diode 19 and the amplifier on the transistor 2O. Differentiating circuit 4 is similar to di (} fermenting circuit 2, and driver 5 is similar to driver 3. Electronic switch b consists of transistor 21 and resistor 22. Interlock circuit 7 consists of inverter 23 of a pulse shaped body on a diode 24 with transistors 2S, 26 and inverter 27. The diode is a threshold device, it generates pulses from the sawtooth voltage of the charge and discharge of a capacitor 28. The proposed device operates as follows. Random sequence pulses (8-1 and 8-2) are applied to a trigger and alternately they throw it in. At the same time, a negative differential arises from the pulse 8-1 on the first shoulder of the trigger, which through differential circuit 4 and the driver 5 enters the pulse analyzer Start input, and from the next pulse 8-2 a negative differential occurs on the other shoulder of the trigger and through the differentiating , circuit 2 and shaper 3 are fed to the input of the CTC of the pulse analyzer. As a result, the analyzer will record (the time interval between the first and second pulses. If the initial state of trigger 1 was opposite, then the first impulse from the random sequence being investigated will set it to the desired position and enter the analyzer's Stop input, but this signal will not be recorded, since the circuit is not prepared for start by the Start signal. the interval is not between the first and second, but between the second and third pulses. After the arrival of a pulse 8-2, a positive voltage jump occurs on the first shoulder of the trigger t and this jump through the forward link circuit 4 enters the blocking circuit 7 (diagram 13), which at the same time produces a blocking signal longer than the measured time of the pulse analyzer. This ignal comes to the electronic key 6, in which the transistor 21 opens and shuns the trigger arm 1, thus terminating the trigger operation. All subsequent pulses arriving during the described blocking of trigger 1 do not lead to its overturning, which means time inter-shafts between these pulses are not recorded until the end of the blocking signal. The closest after the end of the blocking signal, a random sequence pulse can enter the Start of the pulse analyzer, and the described process of registering time intervals is repeated. Thus, when using the proposed device, not all the intervals between pulses are measured, but only the intervals between randomly located pairs of adjacent pulses. But this does not prevent us from getting the right type of distribution of intervals, since the intervals themselves are very small compared to the length of the sequence being studied and there are a very large number of them, and according to the law of large numbers it is enough to measure the values of only part of the intervals distributed throughout their sequence. obtain the type of distribution of intervals with sufficient accuracy. It is also necessary that the duration of the blocking signal be significantly longer than the longest interval in the pulse sequence being studied. Since the magnitude of this longest interval can be different depending on the object of research, the same / the possible adjustment of the duration of the blocking signal. This adjustment is achieved by changing the resistor 29 and selecting the capacitor 28i, for example, using Store Assistance. The need for a blocking scheme is due to the fact that if there are time intervals in the random sequence that are shorter than the analyzer's dead time, the input pulses can be input to the analyzer's start during the analyzer's registration of the previous interval, which may result in a loss of information in the channel. Subject of the Invention An attachment to a pulse analyzer, containing a trigger, differentiating

circuit, electronic key and pulse shapers, characterized in that, in order to expand the range of measured time intervals between pulses of a random sequence, the output of the flip-flop through differentiating circuits is connected to the start and stop shaper, respectively, the trigger output associated with the start signal generator, which is connected by a key connected by a control input to the output of the blocking circuit, the input of which is connected to the input of the start signal generator.

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