SU1071975A1 - Method of reading data from memory crt target - Google Patents

Abstract

METHOD OF MOVEMENT the pedestal of the read pulse signal and differentiate the filtered output signal, characterized in that, in order to increasing the accuracy of reading the ordinates of the registered process, form the first and second binding pulses at the moments of the end of the leading edge and the beginning of the falling edge of the output signal, slow down the first pulse of the binding for a time equal to the maximum duration of the output signal, allow for scanning the first impulse the linearly varying voltage from the initial level, prohibits the sweep of the linearly varying voltage at the time of the formation of the second pulse-binding, I remember the amplitude of the linear-varying voltage at the time of the prohibition before the arrival of the delayed first impulse-snapping, is allowed at this time to sweep the linearly-varying voltage from the core (Ln value in the opposite direction to the initial level with a speed twice as high as in the direction of the direction, they form a pulse-mark-at the moment of linear-ivyyy {g4tsim voltage the initial level, determine the time interval between the front of the formation of the horizontal sync pulse and The imprint of the note is subtracted from this interval of the delay time of the first impulse-attachment, and the value of the registered value of the process under investigation is determined from the obtained value.

Description

The invention relates to electrical measuring technology and can be used to measure redox repetition parameters and single-time fast processes. A known method of reading information from the memory of an electron-receiving N-ray tube (ZELT), which consists in that information that was previously oscillographically recorded on a target in coordinates мп amplitude — time, is read using a transverse teletype type, and the ordinate of the registered process under investigation is determined in kaloda raster line on the temporary position of the pulse marks relative to the horizontal sync pulse GP. A disadvantage of the method is the low accuracy of reading the ordinates of the registered process, due to the dependence on the measurement value of the amplitude and duration of the read signals. The closest to the invention of the technical nature is the method of reading information from the target of the memory cathode ray tube, which consists in that the preliminarily recorded information about the process under investigation after determining the minimum sensitivity threshold of reading and generating a horizontal sync pulse is read the high-frequency oscillations, the low-frequency background components and the pedestal of the read pulse signal are removed by the lower-order raster; they differentiate the output The filtered signal forms a pulse mark tied in time to the trailing edge of the differentiated signal and determines the ordinate value of the registered process under study 2 according to the time the horizontal sync pulse is formed and the mark pulse moment is formed. A disadvantage of the known method is low accuracy The reading of the ordinates of the registered process is due to the dependence on the degree of expression of the maximum amplitude of the output signal. The chain of the invention is to improve the reading accuracy of the registered-ordinates. This goal is achieved by the fact that according to the method of reading information from a target storage tube, which means that previously registered information about the research process after determining and setting the minimum sensitivity threshold of reading and forming LINE cHHXpOMMnyjUUica, is read by a transverse raster , remove the high-frequency oscillations, the low-frequency background components and the pedestal of the read pulse signal and differentiate the output filtered si First, the first and second binding pulses are formed at the moments of the end of the leading edge and the beginning of the trailing edge of the output signal, the first binding pulse is delayed for a time equal to the maximum duration of the output signal, the scanning of linearly changing voltage is allowed at the time of forming the first pulse binding from the initial level, prohibit the sweep of the linear variation of the voltage at the time of the formation of the second pulse-tie, the amplitude of the linear variation of the voltage of the surge voltage is remembered and at the time of arrival of the delayed first impulse-slack, the ramping of the linearly varying voltage from the memorized value in the opposite direction to the initial level at a speed twice as high as the sweep speed in the forward direction is allowed; -changeable voltage of the initial level, determine the time interval between the moment of formation of the horizontal sync pulse and the moment of formation of the pulse-mark, subtract the delay time from this interval of time ervogo pulse-anchor BS and the obtained value was determined value ordinates registered Nogo investigated process. FIG. 1 shows timing diagrams illustrating the method of FIG. 2 is a structural electrical circuit diagram of a variant of the device implementing the method. The method is implemented as follows. The pulse signal (Fig. La) arising on the load of the ZELT in the circuit of the signal plate when reading the track of the recording beam by the transverse-raster pattern is differentiated from the high-frequency oscillations and low-frequency background components from the signal. The differentiated signal (Fig. IS) consists of two half-waves, the temporal position of the first of which coincides in time with the leading edge of the output filtered signal, and the temporal position of the second - with the trailing edge of this signal. The selection of the flat part of the pulse signal is made as follows CT-i. At the time of the termination of the trailing edge of the first half-wave of the differentiated signal ttz), corresponding to the end of the leading edge of the ego signal, the first output lock-on (Fig. 1d) is formed, and at the time impulse the beginning of the leading edge of the second half-wave of the differentiated signal ( tj), corresponding to the beginning of the trailing edge of the output signal, forms the second pulse pattern (Fig. Iq). The length of the time interval between the first and second ancillary impulses (tfe) coincides with the duration of the flat part of the output signal. The first formed igtails-bindings at the moment of time t allow the sweep of the linear-varying voltage (Fig. Iw), which increases in amplitude starting from the level of Шц). A linear change in amplitude occurs until the second of the applied feedback pulses stops it. Thus, the voltage amplitude at the time of the arrival of the second of the associated clamping pulses reaches values lUel which is equivalent to the duration tft. The amplitude lUel is fixed to a point in time: which corresponds to the arrival time of the delayed person for a constant time equal to tj of the first created impulses of bindings (Fig. LeV. This impulse at / time point -ti allows the reversal in the reverse voltage direction with the rate of change amplitudes twice as large as the rate of its change in the interval Cia-, gT At the time point -tg, which corresponds to the moment when the amplitude of voltage reaches the level 1m1, form the pulse-mark (Fig. 1-5). c: i, -, -t two times less than the time interval Ciii l, i.e., equal to 0,. At the moment of time t, synchronized with the start of matching the raster lines, a horizontal sync pulse is produced (Fig. 1b). The time interval between the lines of forming the horizontal sync pulse and pulse is equal to T (, T + e + 0.5t6 where Te is the time interval between the sync pulse and the first generated pulse-demand pulse. After subtracting from the constant value Jy tj, the time interval is obtained, which is the ordinate registered on the ZELT target the process under study, i.e. Tc - tj Ta + 0.5tb TQ. Thus, a time interval Tc — g i is obtained equivalent to the exact value of the ordinate of the process recorded at the target (the exact value opnuHa-rtJ is determined by the definition of the mean line of trace in the read line). If -tf, then I Us l lUa | H t; s TC -13. (The diagrams shown in Fig. 1 by the dotted line). When the duration of the flat part of the pulse signal is equal to tj, the voltage amplitude reaches the value, and the ordinate will be; proportional to Tj, + 0.5 g. When te, О t, the waveform is close to Gaussian or triangular) the instants of impulse impurity coincide (1-2ta), when ets coincide the arrival of the delayed impulse-attachment and the impulse-formation Cti} ts) t and temporal impulse -notes are produced to the maximum of the pulse signal arising at the output of the ZELT device. The device implementing the method consists of the ZELT 1, the active band-pass filter 2, the differentiation unit 3, the read mode control unit 4, the first 5 and the second b of the pulse formers In this case, the impulse-binding delay unit 7, controlled by the integrator 8, the pulse marker generator 9, the horizontal sync pulse delay unit 10, the trigger 11, the 12-dimensional pulse generator, the key 13, and the pulse counter 14. The output of the storage electron tube 1 is connected to the active band-pass filter 2, the output of which is connected to the input of the differentiation unit 3. The output of block 3 is connected to the first inputs of the driver-5 binding-impulse and the driver 6 of the binding-impulse. The output of the imaging unit 5 is connected to the input of the delay impulse unit 7 and the first internal control unit of the controlled integrator 8. The output of the unit 7 is connected to the secondary input of the integrator 8, the third input of which is connected to the output of the imaging unit 6. The output of the integrator 8 is connected to the inputs and the imaging unit 9 of the pulse mark, the output of which is connected to the fourth input of the integrator 8 and the first input of the trigger 11. The second input, the trigger 11 is connected to the output of the block 10 of the horizontal sync pulse delay, the input of which is connected to the first output of the read mode control unit 4 no. The second output of the block 4 is connected to the second inputs of the imaging unit 5 and the imaging unit 6. The remaining outputs of the unit 4 are connected to the inputs of the self-electronic transducer 1. The output of the trigger 11 is connected to the first input of the key 13, the second input of which is connected to the output of the generator 12 measured pulses, and the output of the key 13

associated with the input pulse counter 14 pulses.

The device works as follows.

The pulse signal is fed from the load of the signal plate of the ZELT 1 to the input of the active band-pass filter 2. Block 2 amplifies the signal in power and eliminates high-frequency oscillations and low-frequency background components. From the output of filter 2, the signal is fed to the input of the differentiation unit 3. Block 3 eliminates the pedestal and differentiates the signal. The differentiated signal is fed from the output of block 3 to the inputs of the formers 5 and 6. Emissions corresponding to the pedestal fronts are eliminated by gating the formers 5 and 6. The strobe pulse is received from the read-control unit 4. The former 5 generates a first pulse-tethering, the temporary position of which corresponds to the moment when the rear edge ends. positive half-wave differentiated pulse signal, and the former 6 produces a second. pulse impulse whose temporal position corresponds to the moment of the beginning of the leading edge of the negative half-wave of the differentiated impulse signal, the first pulse pulse arrives at the input of block 7

delays, where it is held for the time tsC / i). The first impulse attachment also goes to the first input of the controlled integrator 8 and allows the voltage sweep at its output.

The voltage value is measured until a second pulse-binding arrives at the third input of the integrator 8, which interrupts the voltage sweep. The voltage at the time of the interruption is remembered by the integrator 8 until the moment when the delayed first binding pulse arrives at its second input. The delayed pulse-binding allows the voltage sweep at the output of the integrator 8 in the opposite direction

at a speed twice as fast as the speed before memorization. The signal from the output of the integrator 8 is fed to the input of the imaging unit 9, which generates a pulse-pulse at the moment when the voltage linearly varying in the opposite direction reaches the initial level and.

The -shulse-mark enters the fourth input of the integrator 8 and transfers it to the initial state. At the beginning of the kamsda read line, the read mode control block 4 generates a horizontal sync pulse. The sync pulse is delayed by time 3 (2) after which it arrives at the trigger 11 input. With the arrival of the sync pulse, trigger 11 opens the key 13, through which dimensional pulses from the generator 12 arrive at the pulse counter 14. After a certain time, the pulse mark returns trigger 11 to the initial condition. The output signal of the trigger 11 blocks the output of the key 13 and impulses from the generator 12 cease to arrive at the input of the counter 14. The time interval between the delayed sync pulse and the mark pulse equals

Te + 0.5 tg-ta (2),

TC.

0 where T;

the time interval between the horizontal sync pulse and the first locked pulse,

0,5t

half the duration of the flat part of the output signal.

When Кз (i) 3 (2) the number of pulses received at the input of the counter 14, is proportional to the ordinate of the registered signal. The method ensures independence of reading accuracy of ordinates from measurements of the amplitude of a pulse signal with its constant parameters and / or readability in the form of output signals close to Gaussian, triangular, trapezoidal and rectangular, which improves the accuracy of reading ordinates of the registered process.

Claims (1)

METHOD FOR READING INFORMATION FROM THE TARGET OF THE REMOVING ELECTRON BEAM TUBE, which consists in the fact that the pre-recorded information about the process under study, after determining and setting the minimum threshold, is sensitive, reading and forming the horizontal sync pulse are read out by the cross-line scanning, and the high-frequency components of the low-frequency signal and differentiate the output filtered signal, characterized in that, with the aim of increased I read accuracy of the ordinates of the registered process, form the first and second impulse-bindings at the moments of the end of the leading edge and the beginning of the trailing edge of the output signal, delay the first impulse-binding for a time equal to the maximum duration of the output signal, allow linear scanning at the moment of formation of the first impulse -variable voltage from the initial level, prohibit at the moment of formation of the second impulse-binding scan linearly-varying voltage, remember the amplitude of the line but of a changing voltage at the time of the ban until the arrival of the delayed 'first impulse-binding, it is allowed at this moment to sweep the linearly changing voltage from the stored value in the opposite direction to the initial level with a speed twice as fast as the sweep in the forward direction, form a pulse -marking- at the moment of reaching linearly zero voltage of the initial level, determine the time interval between the front of formation of the horizontal sync pulse and the moment of pulse formation ki, subtract from this time interval the delay time of the first impulse-binding and the obtained value determines the ordinate of the registered investigated process. SU „„ 1071975>