SU1383358A1 - Signature analyzer - Google Patents

Abstract

The invention relates to computing and can be used to control digital blocks of electronic equipment. The aim of the invention is to enhance the functionality by providing control of standby multivibrators. The signature analyzer contains a signature generation circuit and a pulse duration measuring circuit of waiting multivibrators, containing AND elements 13 and 15, counter 14, trigger 16, one-shot 17, switch P. The analyzer operates in two modes: signature generation and pulse duration measurement, and the first is selected. momentum out of sequence. The measurement results in the first and second modes with the help of the switch 11 are recorded in the buffer register 3 and indicated by the display unit 2. 5 il.

Description

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The invention relates to computing and can be used to control digital blocks of electronic equipment.

The aim of the invention is to enhance the functionality by providing control of standby multivibrators.

FIG. 1 shows a signature diagram of the signature analyzer; in fig. 2-4 are respectively examples of the circuit implementation of the signature generator, the control unit, and the contact probe driver; in fig. 5 - timing diagram of the analyzer in the control mode of standby multivibrators.

The signature analyzer contains a monitored block 1, an indication block 2, a buffer register 3, and the first element 4; the first trigger 5, the driver 6 of signatures, the driver 7 of the signals of the contact probe, the control unit 8, the test setting unit 9, the contact probe 10, the switch 11. The position 12 denotes the control input of the analyzer operating mode. Further, the signature analyzer contains the second element And 13, the counter 14, the third element And 15, the second trigger 16, the one-shot 17.

A signature generator 6 (Fig. 2) contains a shift register 18 with feedbacks through an adder 19 modulo two.

The control unit 8 (Fig. 3) contains the pulse generator 20, the fourth element AND 21, the third trigger 22, the second counter 23, the decoder 24, the OR element 25, and the Exodus 26 and Start 27 buttons.

The shaper 7 of the contact probe signals (Fig. 4) contains a block 28 of reference voltages, resistors 29 and 30, the first and second differential amplifiers 31 and 32 fifth element And 33, and an indicator 34.

Signature analyzer works as follows.

When the Exodus 26 button is pressed, the third trigger 22 of the control unit 8 is set to a position that blocks the flow of pulses from the generator 20 through the fourth element 21 to the second counter 23 which is reset. When you press the Start 27 button, the third trigger 22 opens the fourth element AND 21 and the pulses from the generator 20 arrive at the second counter 23. The decoder 24 produces command pulses Start and End, and between them the OR 25 element generates a series of sync pulses The second counter 23 generates an address arriving at the initiator of 9 tests.

According to the "Start of control 8" signal, the first counter 14 and the signature generator 6 are reset, the first and second triggers 5 and 16 are set to the position opening the first, 4th and third 15 And elements ().

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Depending on the level of the signal on the shielding “Operating mode 12, the signature analyzer can work either in the signature removal mode or in the monitoring mode of the delayed multivibrators. When a mode 12 is applied to the bar, the signal connecting the driver 6 outputs of the signature 6 to the buffer register 3, the sequence of logic signals from the monitored output of unit 1 through

0 the contact probe 10 and the shaper 7 of the signals of the contact probe are fed to the information input of the shaper 6 of the signatures, where it is recorded on the clock signals from the control unit 8.

5 According to the signal "End from control block 8, through the first element 4, information is transferred from the generator 6 of signatures via switch 11 to the buffer register 3 and displayed on the signature indication block 2.

0 When a mode 12 signal is applied to the bus, it connects the inputs of the buffer register 3 to the outputs of the first counter 14, the signature analyzer switches to the standby multivibrator control mode. The contact probe 10 is connected to the output of a monitored stand-by multivibrator unit 1.

The front of the output and pulse of the waiting multivibrator, having passed through the shaper 7 of the contact probe signals and the open third AND 15 element (i / Buxis), opens the second And 13 element for passing the clock signals to the counting input of the counter 14 (t / Bx.f4-2). The recession of the controlled pulse triggers the one-shot 17 (.p), which sets

5 second trigger 16 in the position that closes through the element And 15 the passage of the shear pulses through the element And 13.

Thus, the number of pulses passed in counter 14 is proportional to the duration of the output pulse of the monitored waiting multivibrator.

The signal "End from control unit 8 through the first element 4" translates information from counter 14 through switch 11 into buffer register 3 and displays a number proportional to the duration of the output pulse of the waiting multivibrator on display unit 2.

Claims (1)

Invention Formula 0 Signature analyzer containing display unit, buffer register, first AND element, first trigger, signature driver, contact probe driver, control unit, test setter and contact probe connected to the contact probe driver, the output of which contact is connected to zero input of the first trigger, information output of the sig0 generator the contact probe is connected to the information input of the signature generator, the output of the first trigger is connected to the first input of the first element, the second input of which is connected to the first output of the control unit, the single input of the first trigger is connected to the reset input of the signature generator, and to the second output of the control unit, output the first element I is connected to the gate input of the buffer register, the group of information outputs of which is connected to the group of inputs of the display unit, the third output of the control unit is connected to the blue rotate the signature generator, the output group of the control unit is connected to the group of target inputs of the test master, the output group of which is the group of information outputs of the analyzer for connecting to the inputs of the monitored unit, in order to expand the class of solved tasks by providing control of the waiting multivibra tori, it contains a switch, the second and third elements And, the second trigger, the counter  j ten 20 15 and a one-shot, the first input of the third element I is connected to the input of the one-vibration and the output of the contact probe driver, the one-shot output is connected to the zero input of the second trigger, the single input and output of which are connected respectively to the second output of the control unit, combined with the counter reset input, and with the second input of the third element And, the first and second inputs of the second element And are connected respectively to the third output of the control unit and the output of the third element And, the output of the second element And the connection with the counter input of the counter, the group of bit outputs of which is connected to the first group of information inputs of the switch, the second group of information inputs and the group of outputs of which are connected respectively to the group of information outputs of the signature generator and the group of information inputs of the buffer register, the control input of the switch is the mode setting input analyzer work. // Y // FIG. 2 (Ri.3 Kio l1iiioshiii1shish1ll i l BUT P JUlJinmiUlM fe.J Kb BUT t