SU1243017A1 - Indication device - Google Patents

Abstract

The invention is related to computing and information technology. The purpose of the invention is to increase reliability by increasing the reliability of 1-digitized digital information. The device contains digital indicators, for example gas-discharge indicators, the cathodes of which are connected via a decoder to switching elements connected to the distributor with keys and serially connected counting decades, and the element NOT, with the outputs of the keys connected to the indicators. A new device is the introduction of its AND element, a pulse shaper, and a code converter. The positive effect consists in eliminating failures in the displayed 1-format and on the indicators, when the control pulses are received from the (H) object, by ensuring the operation of the distributor, indicators and counters. decades from the unity-. snnhiz-syn pop, their dashuls selected from the information input code in the code converter. 2 hp, 5 ill. with “sh 4; H

Description

. t12

The invention relates to computing and information measuring. technology,

The purpose of the invention is to expand the device's reliability. .

1. functional diagram of the device is presented; 2 is a block diagram of a code converter; FIG. 3 is a structural diagram of a pulse former; Fig. 4 shows timing charts explaining the operation of the pulse former; Fig. 5 shows timing diagrams for the operation of the VC unit.

The device contains the first element NOT 1, the pulse distributor 2, the switching elements 3, the keys 4, the indicators 5, the decoder 6, the counting decades 7, the code converter 8, the AND 9 element, the pulse shaper 10, the information inputs 1 and 12 of the device 13 input.

The code converter (FIG. 2) contains operational amplifiers 14 and 15, the first and second keys 16 and 17, the second and third elements are NOT 18 and 19, the element OR is NOT 20, the fourth element is HE 21 and the delay element 22.

The pulse shaper (Fig. 3) contains a pulse generator .23, the first, second and third IS-NO elements 24-26, the first and second counters 27 and 28 of the pulses, the first and second triggers 29 and 30, and the comparison element 31.

In figure 4 it is indicated: 32 — external clock sync pulses with a period T, allocated from the information code; 33 — sync pulses from a pulse generator; 34 - control pulse from the object; 35 - pulse at the output of trigger 30, generated by external clock synchronization upon receipt of a control pulse from an object; 36 — sync pulses from a rhotor 23 pulses at the output of the NAND-24 element in the presence of a pulse at the output of the trigger 30; 37 - negative pulse at the output of the counter 27

EO pause time external clock pulses; 38 —the pulse at the output of the comparison element 31, which, after reading by the counter 28, makes it clear that the predetermined number of clock pulses is; 39 - pulse output shaper 10 pulses, taken from the output of the trigger 29,

FIG. 5 denotes: 40 and 41 — bipolar information pulses.

50

five

0

five

0

five

sequential code at the input of the converter; 42 - pulses of the unipolar information code on the first transducer; 43 - clock sync pulses allocated. from the information code; 44 —a control pulse from the object (in this case, the leading edge of the pulse is related to the instant of the appearance of the control signal); 45 - pulse, which determines the time of prohibition of changing information in counting decades, the time of operation of the distributor and the time during which the display of information on digital indicators is allowed (glow); 46 - clock sync pulses, separated from the information signal, at the second input of the distributor; T is the pulse repetition period in each information code word; 4t is the duration of the pause between informational sequential code words.

Information inputs 1 and 12 of the device (inputs of the code converter 8) receive a noise-resistant, bi-polar, serial information flow. The code converter 8 generates from the error-proof bi-polar serial information code a unipolar serial information code, coming from the first output to the first input of the first counting decade 7, and clock sync pulses, coming from the second output to the first inputs of the And 9 element, NOT 1 and shaper 10 pulses.

In the initial state before the arrival of 1 Mpuls from the object to the control input 13 of the device from the output of the former 10

enters the first input of the distributor 2, the second inputs of the element NOT 1 and the element AND 9 logical O, so that the information serial code from the first output of the converter 8 is recorded in decades 7 by clock sync pulses separated from the information code received at the second inputs of decades 7 through the element NOT 1. At this time, the AND 9 element does not pass the clock sync pulses to the distributor 2, which, due to the logical O, is in the initial state at the first input, its outputs have a logical O, i.e. there are no polling pulses equal to long-term3, 1

These clock sync pulses allocated from the information code, and this means that the keys 4 are closed, the indicators 5 are not illuminated. In addition, the distributor 2 in its initial state is prepared for the beginning of work, for ensuring the display of digital indicators, starting from the first.

After a pulse arrives from the object at the control input 13 of the device, the driver 10 memorizes the leading edge, the pulse from the object, ties it to the first pause between the flow code words (diagrams 43 - 45 in FIG. 5) and forms the output of an impulse with a logic level of 1, which arrives at; the first input of the distributor 2, the second inputs of the element NOT 1 and the element AND 9, b of the mark of the passage of sync pulses for decades 7 and the flow of synchro impulses from the output is allowed element and 9 on the second the input of the distributor 2 (diagram 46 in FIG. 5) which is prepared to receive them due to the logical 1 at its first input,

The polling pulses from the output of the distributor 2, which are equal in duration to the clock sync pulses, are successively fed to the corresponding switching elements 3 and the keys 4, thus providing alternate indication from each decade 7 of the last information code word recorded in the register before the pause, during which the control pulse is assigned, from the object to the clock sync pulses separated from the information code stream. The pulse duration at the output of the shaper 10 is determined for specific conditions of the device operation by counting the sync pulses after binding, the number of which is predetermined by the value of the reference code,

Converter 8 code (Fig, 2) works as follows

The binary-decimal serial diode code, information-enters the direct and inverse inputs of the operational amplifiers 14. and 15, In the initial state, on the codes of the operational amplifiers 14 and 15, positive voltages are set, which maintain according to

five

ju 15 20 25

-JQ. Q

0

five

five

174

closed keys 16 and 17. When a converter corresponding to logical 1 arrives at the inputs, the output of operational amplifier 15 sets the voltage of negative polarity that the key 17 opens, and voltage B goes to the HE element 19, the information signal J corresponding to the logical signal is removed from the HE element 21, and from the output of the delay element 22 - the clock synchronization signal corresponding to the received information (diagrams 42 and 43 in FIG. 5). On admission: the inputs of the logical O signal converter operate Discount amplifier 14, switch 16 is opened and zhe .napr of B through NOT elements 18 and NOR 20 outputs a delay signal 22 clocked element. The unipolar interference coming simultaneously to the inputs of the P 12 device does not affect the operation of the code converter, since the operandio amplifiers from them will not work, which ensures a noise-resistant reception of the input signal by the device when

The pulse shaper 10 operates as follows (FIG. 3 and 3),

When a 1–1 pulses (control input 13 of the device) control pulse arrives from an object at the second input of the object, the clock sync pulses from the first input of the driver through trigger I – NE 26 trigger the trigger 30 which remembers the moment: control pulse arrives from the object with an accuracy of 4Т (taking into account the pause between code words), a pulse with a logic level of 1 from the output of trigger 30 is fed to the inputs of the AND-24 element, trigger 29 and counter 28 pulses, so pulses are 0.5T in duration word, 5T. are received from the generator through the IS-NOT 24 element to the second input of the two-bit counter of 27 pulses, the first input of which receives clock sync pulses from the first input of the generator (diagrams 36 and 32 on

Fig 4)

.9

During reception by the device of the code word, clock sync pulses

the pulse counter 27 is reset; every second pulse from the generator does not form at its output, since the pulse period from the generator is 1.5 times longer than the pulse clock cycle. During the pause between the code words, the clock sync pulses do not arrive at the input. Reset of the counter 27 and a pulse will be generated at the output, which triggers the trigger 29 and triggers it from the logical O state to the logical 1 state (Diagrams 37 and 39 on Fig, 4). The pulse from the output of the trigger 29 is fed to the second input of the element IS-NOT 25. At the output of the trigger 29, a pulse is formed with a logic level of 1. After the pause, the clock pulses through the AND-HE elements 25 to the second input of the pulse counter 28 of which pulses A counting of the incoming clock sync pulses is made. The parallel code from the outputs of counter 28 and the reference code arrive at the comparison element 3, the output of which appears a pulse only after the matching of the parallel parallel codes and counter 28, i.e. after the counter 28 has counted a predetermined number of clock sync pulses, which is preset from the reference code (diagram 38 in FIG. 4),

The impulse from the output of the comparison circuit 31 is fed to the input of the trigger 30 (FIGS. 3 and 4), which connects it from the logic 1 state to the logic state. Oh, which prohibits the passage of pulses from the generator to the counter 27, sets the potential at the outputs of the pulse counter 28 to the logical state O and translates the trigger 29 from the logical state I to the logical state O, so that the output of the trigger 29 is set to understanding of logical o

F

Thus, the formation of the pulse duration at the output of the pulse shaper with the arrival of the control pulse device from the object to the control input 13 is provided. After turning on the power, the time for establishing the initial state of the transmitter is no more than .f at the output of the trigger 29.

„Y 15 20 5 o

Q

five

The positive effect of using the proposed device in comparison with the known one is in increasing the authenticity of the displayed digital information by eliminating possible malfunctions in the displayed digital information on the indicators when control pulses are received from an object, by ensuring the operation of the distributor, display circuits and counting decades from the single clock pulses allocated from the information input code in the converter 8; and also by increasing the noise immunity of the information entered in the counting decades .7, by using a noise-tolerant bipolar code for entering information into the device and extracting from it, in the converter 8, informational unipolar serial code and clock sync pulses, in which unipolar disturbances induced by on the input information part of the device operating under the influence of external interference when testing radio electronic systems at facilities.

Claims (3)

Formula of gain 1, A device for indication, connected in series counting decades, the outputs of which are co.- are connected to the inputs of the switching elements, the outputs of which are connected to the inputs of the decoder, the outputs that are connected to the information electrodes, the indicators, the control electrodes of which are connected via keys with the OUTPUT of the pulse distributor, and the first element is NOT, of which there is, in order to increase the reliability of the device, the converter code, the element And n: pulse shaper, first exit the forming of codes is connected to the first input of the first counting decades, and the second output - with pervy-. the inputs of the element AND, the element NOT and the pulse generator, the output of which is connected to the second inputs of the element AND, the element NOT and the first input of the pulse distributor, the second input of which is connected to the output of the element AND, the output of the element is NOT connected to the corresponding inputs of the counting decades, the information inputs of the converter codes are the first and second information inputs of the device, the second input of the pulse generator is the control input ycTpojicTBa 2. The device according to claim 1, wherein the code converter contains two operational amplifiers, two keys, the second, third and fourth elements are NOT, the element OR-NOT and the element of delay whose input is connected to the output of the element OR NOT, whose inputs are connected to the outputs of the second and third elements NOT, the inputs of which are connected to the outputs of keys connected to the outputs of operational amplifiers, the output of the third element is NOT connected to the input of the fourth element NOT whose output is the second output of the code converter, and you od delay element - the first output transducer codes operatsionFig inputs. one Amplifiers are the information inputs of a code converter. 3. The device according to claim 1, which is based on the fact that it forms. The pulse generator contains a series-connected pulse generator, the first IS-NOT element and the first pulse counter, two flip-flops, the second AND-NOT element sequentially connected, the second counter and the comparison element, and the third IS-NOT element, the output of which is connected to the first input of the first the trigger, the second input of which is connected to the output of the reference element, and the output to the second inputs of the first NAND element, the second trigger and the second counter, the second inputs of the first pulse counter, the second NAND element and the first input of the third el ment AND-NO element are the first input of the pulse shaper and the second input of the third AND-NO element is a second input of the pulse shaper. FIG. 2 about H 23 one FIG. H Editor N. Yatsola 5. . Compiled by A. Kuliev Tehred M. Khodanich Proofreader E, Sirokhman 3709/51 Circulation 455 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4