SU1288648A1 - Digital analyzer of time intervals - Google Patents

Abstract

The invention can be used in information-measuring systems for analyzing quantities and. pulse duration. The purpose of the invention is to simplify the design and expand the functionality of the analyzer. The digital analyzer contains a control unit 1, a generator of 2 pulses, a key 3, counters 4 and 5 of pulses, a unit 6 of the installation, and blocks 11 of the display. The implementation of the installation unit 6 in the form of a generator of short pulses 7 and the element OR 8 and the formation of new functional connections enable one to achieve the set goal. 1 3.p. f-ly, 2 ill. HS oo 00 CD 4 00

Description

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The invention relates to a pulse technique and can be used in information measurement systems for analyzing the number and duration of pulses in a pulse sequence under study.

The aim of the invention is to simplify the design 1 and to extend the functionality of the device.

Fig, 1 shows a block diagram of a digital time interval analyzer; Fig, 2 - time diagrams of his work.

The device contains a control unit 1, a pulse generator 2, a key 3 first 4 and a second 5 pulse counters, a setup unit 6 consisting of a short pulse former 7 and an OR element 8, the control unit 1 can be performed using a time relay 9, for example one-shot and element And 10. To fix the result, the device may contain display units 11. Key 3 and device relays 9 are made in the form of elements I.

The device works follow; im image.

The impulse arriving at the bus Reset of the block 6, the counter 4 directly, and the counter 5 through the element OR 8 of the block 6 are set to the initial (zero) position, ImpulJ - som fed to the bus Start control block 1 (FIG. 2 b) time relay 9 starts. At the output of relay 9, a pulse is formed with a duration T (mg. 2 V), corresponding to the analysis time of the pulse sequence being analyzed, which is fed to the input of the device (phage 2 a). The number (duration) of pulses this pulse sequence corresponds to the number (duration) of the analyzed time intervals,

The pulses (, 2,3,.,., P) of the pulse sequence under study with duration t- through the element 10 of block 1, open for the analysis time T (for which its control input is connected to the output of the time relay), pass on the information (counting) input of the counter 4, the control input of the key 3 and the input of the block 6 (Fig. 2 g). For a time equal to t, the key 3 is opened and the clock pulses of the generator 2 (FIG. 2 d) begin to fill the counter 5 (FIG. 2 e), the capacity of which corresponds to a predetermined rate of 1 interiapov time. If T; , then the counter 5 counts a certain number of clock pulses equal to (where f „is the frequency of the clock pulses) and the pulse from the second output of block b is reset to zero position.

A reset pulse (FIG. 2h) is formed by the shaper 7 of block 6 at the moment of time, corresponding to the falling front of each pulse of the sequence under study (fig. 2 g), passes through the OR element 8 to the second output of block 6 and goes further to the installation the input of the counter 5, If within the time T of the analysis it turns out that X; T ″ (for example, the third pulse in FIG. 2 g), then the counter 5 will overflow before the reset input comes a reset pulse from unit 6 (FIG. 2 e), begins to fill up again (FIG 2 g), and finally, the reset pulse (FIG. 2h) will be set to zero position. The overflow pulse number taken from the output of counter 5 (FIG. 2 and) will indicate the fact that the number of elevations exceeds the duration: time intervals

Counter 4 counts the pulses (i 1,2,. ,,, п) of the sequence under study, arriving at its counting input during analysis time T (FIG. 2 g). The capacity of this counter corresponds to a predetermined rate in the number n of time intervals. If, then counter 4 counts the total number of pulses received at its counting input during the analysis (this number will obviously be less than the capacity of the counter, so the latter will not fill completely), If the PUP is, then counter 4 will overflow and The output will indicate the fact of exceeding the norm in the number of n „time intervals. The total number of pulses of the studied sequence during analysis time T in this case can be calculated by the formula: aN, + N4, where a is the number of overflow pulses of the counter 4, N, is the capacity of the counter 4, N is the number recorded in this counter to the end point analysis time. (Fig. 2 c).

Claims (2)

1. A digital time interval analyzer containing a pulse generator, the output of which is connected to the first key input, the second input of which is connected to the output of the control unit, the input of which is connected to the input bus, the installation unit, the first and second pulse counters, and that, in order to simplify the device and expand its functionality, it is connected to the control input of the second pulse counter, whose information input is connected to the key output, while the control input of the control unit is connected to Bus Start. 2. The analyzer according to claim 1, characterized in that the installation unit contains a pulse-width switch serial input connected to the input of the blocks and the OR element, the second input of the installation and to the information input of the first pulse counter, controlled by lc tion whose input is connected to the first output of the installation unit and to the bus Reset, the second output of which is Editor A. Shandor Compiled by A. Klimov Tehred V. Kadar Order 7806/45 Circulation 393Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 .k mi ™ .- - “- shi in -. Production and printing company, Uzhgorod, st. Project, 4 86484 keys to the control input of the second pulse counter, the information input of which is connected to the output of the key, while the control input of the control unit is connected to the Start bus. 2. The analyzer according to claim 1, wherein the installation unit comprises a short pulse generator serially connected is the first output of the installation block, the output of the OR element is the second output, and the input of the short pulse generator is the input of the block FIG. 2  Proof-reader I. Erdeyi