DE3222926A1 - MICROPROCESSOR ANALYZER FROM ELECTROCARDIOGRAMS - Google Patents

Description

PATENT LAWYERS

OR.-ING. H. FINCKE Ί "V. · -": {. '. 11 '": DIPL-ING. H. BOHR :::." : ::.: ":: . ' DIPL-ING. S. STAEGER """V If ·

MUNICH 5 Note: GORENJE TGO June 18, 1982

mOllerstrasse 31 n.sol.o., Velenje B 869-Sp / Z.

Yugoslavia

ELECTROCARDIOGRAM MICROPROCESSOR ANALYZER

The subject of the invention is a microprocessor analyzer of j ectrocardiograms, i.e. a device for automatic! Analysis of electrocardiograms taken on the basis of the exercise test prescribed protocol works. ;

As is known, various states of the heart muscle can be associated with; Using electrocardiograph to be recorded on paper _; characteristic curves are formed. Between a \ disease state of the muscle and the Kurvenfora there is a certain correlation, so that the cardiologist with their analysis, 'that is, with a parameter evaluation, various disease states can determine.

A common visual analysis of the recorded electrocardiac *

gramms is a rather monotonous and time consuming job that; has a routine character. The results are therefore often [very much influenced by the mood and the subjective view of the doctor depending, of course, but also on his ability and experience. . :

With the development of powerful computers, the following also became: an automatic analysis of electrocardiograms possible. Until now two types of fixtures were designed for such analyzes developed in the world. The first group includes large computer systems, that store huge amounts of data, i.e. recordings from electrocardiographs, which, however, work indirectly, i.e. that the electrocardiograms are first recorded e.g. on tape, which is then transported to the computer, where the data processing is carried out.

The second group includes small portable devices called electrocardiograms analyze immediately, i.e. when the patient is connected to the electrocardiograph. Some of these Devices are designed with hard-wired logic, In recent times, however, there have also been devices whose

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Activity is based on the use of a microprocessor system as the control and monitoring unit.

The main features of these known devices are that, on the one hand, they have the disadvantages listed earlier avoid the visual analysis, so that they create an objective analysis of the disease state, its disadvantage but lies in the fact that, according to its concept, it is only adapted to certain designs of the cardiological equipment are what certainly narrows their usability.

It is the object of the invention to provide a microprocessor analyzer: of electrocardiograms that are perfectly capable. is to interact with the output of existing standardized electrocardiographs so that they already exist de appropriate equipment can be modernized; the activity of the analyzer follows a specific protocol, which is intended for the stress test, i.e. for the situation in which the patient is physically stressed and his heart activity is controlled in this state.

The inventive microprocessor analyzer of electrocardiograms is described in more detail in the porting of this application and illustrated in the drawings. Show in it:

1 shows the block diagram of an analyzer according to the invention

2 shows a typical form of an electrocardiogram with the most important Parameters necessary for the analysis;

3 shows the circuit diagram of an adaptive filter according to the invention to eliminate grid frequency interference;

Fig. 4- the circuit diagram eico: impulse circuit, which connects the function keys with the processor and the peripheral adapter

As can be seen from Fig. 1, the analyzer according to the invention from a low pass filter 1, circuits 2, 3, 4 to Eliruinierunp; of network interference, a high-pass filter 5 »one Cultiplexer circuit 6, an output intermediate device 7, multiplexer 8, a 10-bit A / D converter 9> a random memory 10

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a memory module 11, an 8-bit microprocessor 12, an adapter 13, an alphanumeric keyboard 14, a nucleus display unit 151, a printer 16 and a programmed clock 17. As can be seen from FIG. 1, the multiplexer circuit has 6 inputs for connecting any standard recording device - an electrocardiograph, the so-called SCOPE outputs being used for these. The output of the ZwLscherigeräts7 is connected to the input of the multiplexer 6 and at the same time is also connected to the input of the demultiplexer 8, the output of the multiplexer 6 being connected to the input of the low-pass filter 1; The output of this filter 1 is, however, connected to the input of the circuits 2, 4 for elimination of the network disturbances, whereby the input 3 for the elimination of the network disturbances is connected to the output of the circuit 2 for KLininierung the network disturbances, its output is however to the second: . Input of circuit 4 connected to eliminate the Netzstöruncen. The output of this circuit 4 is connected to the input of the Koch pass filter 5, the output of which is connected to the input of the 10-bit A / D converter 9. The output of this converter is connected on the one hand to the input of the output device 7, but on the other hand to the peripheral adapter 13, which is simultaneously with the random memory 10, the memory module 11, the 8-bit microprocessor 12, which can be an NC6800, for example, and the programmed clock 17 is connected, on the other hand, the peripheral adapter 13 to the alphanumeric keypad 14, the time and heart rate display unit 15 closed and adapted to the printer 16 \. ;

Fig. 3 shows more precisely the adaptive filter of high quality for eliminating network disturbances. In this filter, the anode of the diode D _{2Q is connected} to a special winding of the Hetztransformer, but its cathode is connected to the base of the NPN transistor Tp _{0 via the resistor RpQ} , the emitter of which is connected to ground, but the collector is connected to the supply voltage ■ + _{via the resistor R 2 -}

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but also connected to one of the inputs of the voltage-controlled oscillator 21. The output of the oscillator 21 is connected to the input of the binary counter 22, the outputs of which. Ip ₀ , I ₂ λ ι Ip? ^ ¹ ^ ^? 3 are connected ^to ^ ^e control inputs of the analog switches 23, 24. The outputs of the switches 23, 24 are connected to one connection of the capacitors ^C 2 ⁷ 0 "" ^ 246, the other connections of which are interconnected and connected to a connection of the variable resistor P ^ q and the input of the isolating stage 25, the output of which is connected to the Input of the low-pass filter? 0 is connected, the output of which is connected to the input of the high-pass filter 31. The output of this filter is connected via the variable resistor P-, p to the input of the adder 40, the same input via the resistor R ^ to the other connection of the variable resistor P ₂₀ and the connection for the signal Vp _x . connected is. The output from the adder 40 is connected to the input of the A / D converter 9.

As mentioned, Pig. Figure 4 shows a pulse circuit intended for connecting the function keys on the keyboard to the processor and the peripheral adapter. This circuit consists of the diodes E _x . ^, ^ I4i ^^ ^ i4? ^unc ^ ^ ^en resistances

^ 142 ' ^wo ^ ^e · ^ · d ^ ^e connection points of each

Diode and resistor, which _{are labeled V x} . ^, V _x . ^ And V _x . ^ Ρ, lead to the three function keys ANALYSIS, INTERRUPTION, STOP, which close the listed inputs to Hasse. The anodes of the listed diodes are connected together and above the. Resistor ß / 1 ^ .2 connected to the base of the PNP transistor T _x - ^ ₀ , the capacitor C _x . ^ Being connected between the base and the emitter of this transistor T _x - ^ _0. The collector of the transistor T _x J ^ ₀ is connected to the synchronization input C _x . of the bistable multivibrator of the D-type in an integrated circuit IC _x J ^ q. Between the inputs R _x . and Q _x . is the resistance

connected, the input R _x . is also connected to ground via the capacitor C _x ^ _{x J;} a resistor R. * ^ is also connected between the inputs R ₂ and Q _2,

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parallel to which a diode D ^ · / is connected, and the ^; Input R ₂ is also via the capacitor C ^ ₂ at the cash register

switched. The output I ₁ ^ _{0 of} the multivibrator IC ₁ ^ is nit:

connected to processor 12. j

The operation of the microprocessor analyzer according to the invention from El ektrokardiograniaen is described in the continuation. The processor 12, which consists, for example, of the type HC6ß00 , 'executes the im
Memory module 11, which consists, for example, of type T! 1M 323, outputs stored program commands. This memory module 11 contains the
Program, with which the activity of the entire system is prescribed, ie the operational part and the callLysis algorithms for; the determination of the cardiological parameters, ie the analysis j part.

When the device is switched on, the printer IG j prints the request for the date and time to be entered, j the operator gives the answer using the alphanumeric keyboard
14. The system receives the response via the peripheral adapter I3, 'which consists, for example, of type NC6821, and sets it in Gai.r. the programmed clock 17i which consists, for example, of the type KC6840 and which [ from now on keeps an exact time of the day of operation until
to switch off the system by interrupting the line up to ^: the microprocessor 12.

By connecting to the electrocardiograph in a standard version, the analyzer receives amplified bioelectrical signals from this, which reach the multiplexer circuit 6
the keyboard 14, which according to the program activates the system with a call to the peripheral adapter 13, can insert the code of the channel to be analyzed into the output device 7.
At the same time this code is transmitted to the demultiplexer 6, whereby the light-emitting diode belonging to the selected channel lights up.

Before the test itself, it is possible to enter 14 data using the keyboard
to be entered about the patient. All data are printed out via the printer 16, namely:

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- Indication of whether the testament; of the patient with the help of the ergonomist or the treadmill runs;

- first name and surname of the patient;

- Age, gender, weight and information about the physical activity of the patient; .

- number of the patient;

- Naiae of the attending physician;

- Delivery diagnosis.

Before the test or immediately after it can be prompted A special function can also be activated via the keyboard, which is entered with the keyboard 14 according to the program Transfers data to printer 16. So can the standard protocol supplemented with various subjective considerations and comments will.

Each electrocardiograph contains a reference source with the voltage 1 mV, which is used as calibration. This signal must enter the analyzer itself before the start of the test can be entered in the form of a train of left-right corner pulses. With A calibration algorithm is a special requirement via the keyboard 14 triggered, which forms the number equivalent for 1 mV due to the incoming analog pulses. It transfers the analog signal from multiplexer 6 passes through a series of analog active filters 1, 2, 3, 4 and described later to the 10-bit A / D converter 9. This eyes the entering Signal with a certain frequency, this from the programmed clock 17 is controlled. The individual samples are sequentially stored in specific locations in the random memory .10 saved, which e.g. consists of the type TMM314. According to the program the positive and negative transition of the input signal is detected, so that in the vicinity of the one and the Otherwise, 11 samples can be saved each time. This one Samples are still tied samples from eight following Calibration pulses are added, with the average Difference between the levels before the positive and the

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negative signal transition and then the Nunnernaquivalerit des Calibration signal, i.e. 1 nV. The received Nunner is stored in the Eandon memory 10.

In the case of the analyzer carried out by the company; Programs Two ways of starting are provided: with one, the time measurement, which illustrates the duration of the test, is not yet switched on, in the case of the other, however, it is switched on. However, all other allowances during commissioning are the same. The selected ECG signal must arrive via the multiplexer 6, which corresponds in shape to the left precardial leads found in Pig. 2 are shown. Such a signal will be fine Stress test accompanied by several types of malfunction:

- Because of poor contact between the electrodes and the skin surface and because of the muscle potentials, disturbances occur, the frequency spectrum of which is largely higher than the frequency content of the EKG signal is;

- Because of breathing and the movement of the chest, the basic signal is heard superimposes a low-frequency drift of the isoelectric line;

- The frequency of 50 Hz, which is in the range of the Frequency spectrum of the EKG signal lies.

All of these interferences must be eliminated, for which the above-mentioned active analog filters 1-5 have been used. The operation of this filter is as follows: The low-pass filter 1 eliminates the high-frequency and low-Ilochpassfilter 5, the <-frequency artifacts. The combination of the circuits 2, 5, 4 ^: ensures the elimination of Netzstörunrjen. It is important that the network frequency itself is attenuated as much as possible, but the frequencies in the vicinity of the network frequency must not be too severely affected. However, since it is known at the same time that the network frequency is not completely constant, the desired effect could not always be achieved with a high quality notch filter. The solution is the transversal filter, which guarantees a very high quality,

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At the same time, however, its central frequency can be with one external pulse generator can be changed without changing would somehow change the passage curve.

The activity of the filter according to FIG. 3 intended for the elimination of the network disturbances is v: ie follows. The control signal initiated by the separate winding on the Netztransforuiator ^, which has the sinusoidal shape of the network frequency, reaches _{the ITPN transistor Tpo 'via input V 20} , which forms a train of square-wave pulses from it. These Iir.pul.se synchronize the voltage-controlled oscillator 21, the frequency of which is set to approximately N times the value of the mains frequency when idling, with 2 being the number of states in the binary counter 22. Since this counter 22 is connected as a frequency divider to the feedback loop for the voltage-controlled oscillator 21, this oscillator oscillates exactly N-aal faster than the mains frequency. The outputs of the counter 22, ie. Ion '^ 21'"^? 2 ¹¹¹¹ ^ ^- ^ 2V are connected to the control inputs of the analog switches 23; 24, which switch the N capacitors one after the other to the cash register in the rhythm of the oscillator 21. The signal that is sent via the input Vp _x . Reaches the variable resistance Pp ₀ , enters the transversal filter described above, which lets through the clock frequency, ie the mains frequency and its harmonic frequencies higher harmonic frequencies are eliminated, and the high-pass filter 311, which compensates for the permeability of the transversal filter at very low frequencies. The adder 40 is only reached by mains frequency disturbances that are phase rotated by .. 180 °. The variable resistance P, ρ makes it possible to adjust the signal amplitude to regulate, so that a complete reduction of the disturbances occurs, which together with the useful signal over the immediate line e arrive via the resistor R ^ _0. In this way, the line frequencies in the output signal are attenuated by approximately 40 dB. The quality of the notch filter described depends on the value of the variable resistance P ₂ Qi

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the values and the number of switched capacitors ^c 2 30 "" ^ 246 and the center frequency · -. ie the oscillator frequency

Q - 2nd

where C is the value of the switched capacitors in F,

N their number and P ^ ₀ the set value of the variable

Resistance Pp ₀ ^ ⁿ

The filtered signal then goes to the input of the A / D
Umwancllers% of e.g. from the type AD574JK. exists and who it
converted into a series of nuuuaern recordings.

The decommissioning proceeds with a progressive star: »
Frequency, e.g. 500 Hz, dictated by the programmed clock 17. The coughs are transferred and entered into the random memory 10. At the same time, however, the individual | Looking for a QRS complex (system as an input signal). As soon ! a QRS complex is found, it is calculated according to mathematical verification. driving as normal systole or as extrasystole and evaluated. classified. Extrasystoles become further in supraventricular
and ventricular separated, the number of the two will however; throughout the test in special places in the Raiido-spoicher 10
accumulated. Normal systoles become an average | systole formed, which is represented with a sequence of 256 coughs

and stored in random memory 10. J

Every detection of the QRS complex triggers a programmatic i conversion of the heart rate. The calculated value will be
via the peripheral adapter 13 to the 7 "segment luminous number display unit 15. On the other Ku ::. merr: display, the time that shows the duration of the patient's exposure (in minutes and seconds) runs for the entire duration of the test Time relationships are regulated by the programmed clock 17, which activates the processor 12 with the program from the memory module 11 with the aid of the interrupt line. The processor 12 controls the
Peripheral adapter 13 the display units 15.

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At the moment at which the patient began to stress it is necessary to press the key on the keyboard 14- Press START. This unlocks the clock 17 with the specific code from what, as a result, the sequence of the above-described system of decommissioning, detection, averaging and the representation has. Next to the STAKT key and the alphanumeric Keys, which all generate the corresponding hexadecimal codes when printing, are also on the keyboard Keys that are not coded. These buttons are for the request for analysis of the input data (AIiALYSIS), after interruption of the patient's exposure (INTERRUPTION) and the complete test setting (STOP). When you press this, the unmasked interrupt line of the 1-processor 12 is activated, i.e. it stops the processor from working regardless of what its current Activity (even if it is in a routine interruption). It is understandable that such an unconditional The interruption must not last too long, as in this case all system functions would be disabled.

The circuit already described according to FIG. 4- ensures that when the three keys mentioned above are pressed, a pulse lasting only about 3 / US is triggered, even though the key was pressed for a significantly longer time or if it was even pressed again one after the other became. In this circuit, the PNP transistor ^ ₁₄₀ I der "works when you press any of the function keys, which are due to the diodes and D ₁₄₂ and the resistors R ₁₄₀ , R ₁₄₁ and R ₁₄₂ a

Form an AND circuit, generate a positive voltage jump and thus act as an inverter. The capacitor C _4Q filters out random interference and voltage peaks that arise due to the contact bruises when the button is pressed. The voltage transition is transmitted when switching the transistor I ₁₄₀ ⁸ ^ ^ ^e ^ synchronization input of the bistable multivibrator of the D-type, which is located in 1 ^ ₁₄₀ , with a high voltage level at the output of the multivibrator IC ₁₄₀

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^ 1 However, a low voltage level forms. After that of the elements H. ^, - and C. ^. a certain time is sent to multivibrator input JR. a reset pulse is triggered, while output Q. goes to a low voltage level, but output ^ goes to a high voltage level. This last transition in particular triggers the switchover of the other D-Type multivibrator, which is also located in the IC. ^ Q. A low voltage level is set at output Qp, which prevents the state from being switched to Q. or OIL via input D. The blocking lasts until after a certain with the elements R ^ g and C ^ p. Time about the Einfaiif “not the second multivibrator is set back. The diode D ^ ₇ helps that the charge is removed from the capacitor ^ /, p as quickly as possible after the reset, so that the circuit is ready for a new cycle, which was described in this paragraph.

The lines V ^ ₀ , V .. and V _L _ are also led to the peripheral adapter 13, which gives the processor 12 the information about which wel-; before the puncture buttons generated the interruption. As already described, the interruption pulse ar. Output 'Q' of the multivibrator is generated and sent to the output; I- ^ ₀ connected line directly. To the input for the nicbJ masked interrupt ac. Processor 12 transferred. ;

The request for an analysis, which is triggered with the AIiALYSE key, inserts a special indicator bit into the random memory via the program. After the night demanded average value is formed from M heartbeats, where M ^ less.d great. must be in order to obtain a statistically satisfactory average value, which at the same time does not have to be too large so that the average value is not formed too long - there is a favorable choice Il = 2 ^a , e.g. 3. I'i = 16, will be given to the employee. Bit, of which the analysis wii'd, with the execution C of the programs for the mathematical determinationux.r; der ker.r.zeichr-.e. '. the parameters at the input of the ExLG signals begin ::. This does not, however, ground the other arialy sat or functions described above

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\ interrupted, because they are ^v regulated by the clock 17, which interrupts the activity of the processor 12 at regular time intervals and demands that it be taken out of service, an entry from the keyboard 14, transmission of the data to the printer 16 or number displays, etc. carries out. The system works according to the principle of the time division method, which is ensured by a corresponding operational part of the program stored in the memory module 11.

The average of the systoles, processed in front of the analysis pro graph may not be accessible for the registration of new customers as long as the analysis is taking place. Therefore two are alike DataswHäieagüräüe. available, which is located in the random memory 10 and in which the average value H of the systoles is introduced as an alternative. The analysis results are in BCD code stored as a vector in random memory 10. The program for the printer output combines this with accompanying texts that iia Speicherinodul 11 are saved, and they all print out the log after about the printer 16.

When the patient gets tired or when it becomes abnormal If a reaction occurs (too high pulse or blood pressure), the exercise must be switched off immediately. So-called test interruption occurs, what the operator communicates to the analyzer by pressing the UCTIBRECHUNG button. In this moment poses the display value, which indicates the test duration, to O (counting of the time after the test), automatically becomes a requirement generated after an analysis, the results of which are printed out, then 16 messages are received via the printer, In which Ilinute and second the test was interrupted, it is necessary, however, via the keyboard 14 to identify the cause of the Enter the interruption, which is also printed out on printer 16. Stand while the patient is calming down all punctures of the analyzer are available so that it is possible to each. Time again the incoming ZKG signal analyze.

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With the STOP button the device will listen; on, the input signal to pursue, i.e. the programmed clock 17 »which the demand has asked after retirement, stops. The total number of extrasystoles, both the supraventricular than looking the ventricular, throughout Tests that determine the maximum heart rate allowed in relation to the age and sex of the patient and the actual Maximum heart rate reached received during the test. There is the! • solubility given that the keyboard 14 is the maximum, blood pressure obtained during the test is entered; if If this is done, the product of this pressure and the maximum achieved pulse is automatically calculated, at the same time however, this value is also printed out, divided by 1000. The final specifications also include information about the theoretical Norm for oxygen consumption during exercise in terms of age, sex, weight and age However, the physical activity of the patient, the consumption actually achieved, can be entered again via the keyboard 14 or it is left to the analyzer to determine this itself based on the test duration.

Finally, the printer 16 also draws the minute hystograms for the heart rate curve, the ratio of the stress wave R to the pre-stress wave P, for the depression of the J point, the Inclination of the section ST and for the integral under the section ST. This is followed automatically by the initialization of the System so that it is prepared for the connection of a new patient.

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Claims (3)

DIPL-INaH. DRILL I ^ _: "::". ..-: 3222926 DlPL-INa S. STAEQER ::: *: ::.: ■:: .- *> * - * - * cv MUNICH 5 -; B 869-Sp / Z. mOllerstrasse 31 Note. GORENJE TGO n.sol.o. IR 6 1982 PATENT CLAIMS Velenje / Yugoslavia ti. iMicroprocessor analyzer of electrocardiogranines to the a standard recording device is connected, characterized in that that the recording device is connected to the inputs of the multiplexer circuit (6), to its input also the output of the intermediate device (7) is connected, which at the same time also to the input of the demultiplexer (8) is connected, the output of the multiplexer circuit (6) is connected to the input of the low-pass filter (1), the output of this filter for elining the network disturbances at the input of the circuits (2, 4) is connected, the output of the circuit (2) for eliminating the network interference to the input of the circuit (3) for elimination of the net disturbances, but their outcome on the other input · of the circuit (4) for eliminating network disturbances is connected, and that the output of the Circuit (4) is connected to the input of the high-pass filter (5), the output of which is connected to the input of the 10-bit A / D converter (9) is connected and the output of this Uinwandlers (9) on the one hand to the input of the output intermediate device (7), but on the other hand is connected to the peripheral adapter (13), which is simultaneously with the ßandon memory (10), the memory module (11), the 8-bit microprocessor (12) and the programmed clock (17) is connected, the peripheral adapter (1 $) to the alphanumeric Keyboard (14), the display unit (15) and the printer (16) are connected, 2. Analyzer according to claim 1, characterized in that - ^ the anode of the diode (D _? Q) via the input (Vp ₀ ) is connected to the winding of the mains transformer, its cathode via the resistor (^ pn ^ ³ ^ ^{1 die Bas: i} - ^{S of the 1} ^ transistor (T ^ q), the emitter of which is connected to the cash register, the collector, however, via the resistor (^ ₂ ,,) to the supply voltage (+ V ^), but also to one of the inputs of the voltage-controlled oscillator (21) COPY is closed, the output doc oscillator (21) r.:with the installation of the binary counter (22) is connected, the outputs (I ₂₀ , I ₂₁ * * ₂₂ ι I ₂ ^) to the control inputs of the analog switches (23, 24 ) are connected, but the outputs of these switches (25, 24) are connected to one connection of the capacitors (0ρ3θ ~ ^ 246 ^ ^ S ⁰³⁰ * ¹ ! - ⁰³³⁶¹¹ , whose other connections are connected together and with one connection of the variable resistor (P ₂ ( P ^ d connected to the input of the Trerm stage (25), the output of which is connected to the input of the low-pass filter (30), the output of which is connected to the input of the high-pass filter (31), the output of this filter (3I), however via the variable resistor (P ₇₂ ) ¹ ^ t is connected to the input of the adder (40), the same input via the resistor (^ q) to the: other connection of the variable resistor (Poq) and the connection for the signal ( Vp ,,) is connected, and that the output of the adder ( 40) is connected to the input of the A / D converter (9). 3. Analyzer according to claim 1, wherein the keyboard 14 to the processor 12 and the peripheral adapter 13 connects a Inpulεschaltung, characterized in that this circuit composed of diodes (D ^ _0, D ^, ^D i4p) ^{υηά cons} "stands (ß / j ^ Q '^ 141' ^K 142 ^ ^beQten-fc »where the connection points of the individual diode and the resistor inputs ^ 14O ' ^V 141' ^ 142 ^" bild · ⁰¹¹ · " ^d ^ ^e ^ three ^ function keys (AITALYSE, UIiTEIiBIiEOHUIiG , STOP) are closed, the other connections of which are connected to ground and the anodes of the diodes ( ⁰ ^ q> ^ / (. Ι ' ^D 142 ^ connected and connected via the resistor (iL ^ *) to the base of the PNP transistor (T. ^) are connected, the emitter of which is connected to the supply terminal ( ^v qq) and to one connection of the capacitor ( ^c ^ 4q), the other connection of which is connected to its base and the collector of the transistor (T ^ ₄₀ ) via the resistance (^ 4.4.) to ground and to the synchronization input (C ^) of the bistable multivibrator of the D-Ty pe BATH ORIGINAL O O O O O O Λ . 3. is connected in the integrated circuit (IC. ^), in which _{the resistor (R ^ c) is connected between the inputs (B 1} , Q ₁ ) and a connection of the capacitor (C. ^^) is also connected to the input GO , connected with the other terminal connected to ground and the output (<£ *) nit the synchronization input C ^c p ^ ^{of zwe} ^ ^te bistable multivibrator in the same integrated circuit (IC,. ^) is connected, and that the output (Φρ) ^ ^{it 2} W ⁶ ^ t ⁰¹¹ multivibrator is connected to the input (D.) of the first multivibrator, but the output (Q ₀ ) of the second multibibrator via the resistor (R-izic)> parallel to which a diode (D ^ z) is switched, with the input (10 »^ ^it is switched to ground via the capacitor (C ₁ ^ ₂ ) at the same time and the output (1 ^ ₀ ) is switched to the connection 05Lj» C ₂ ), which is connected to the processor (12 ) is connected. BATH ORIGINAL