(57) Abstract:The invention relates to computer technology and can be used for functional conversion of analog values in computing machines. The aim of the invention is the representation of the transformation in the form of an analog signal and improve performance of the Converter. To achieve the goal in the Converter introduced the comparator standby multivibrator, two shaper pulses, the integrator and sample-and-hold. In this Converter, the conversion result is generated for one period of the pulse signal as an analog signal. 2 Il. The invention relates to computer technology and can be used for functional conversion of analog values in computing machines.The purpose of the invention, the representation of the transformation in the form of an analog signal and improve performance of the Converter.In Fig. 1 shows the structural diagram of the proposed functional Converter of Fig.2 timing diagrams explaining his work.Functional Converter comprises a block 1 selection module, an adder 2, integrate is 10, the tire 11 of the reference voltage and the output bus 12.The input unit 1 is connected to the bus 10, and the output from the second input of the adder 2, the first input connected to the bus 11 and the second input of the comparator 5, and the output information input of the integrator 3, the output of which is connected to the first input of the comparator 5. The input of the multivibrator 6 is connected to the output equal to the comparator 5 and the reset input of the integrator 3, the direct output from the input of the shaper 7 and the inverted output from the information input of the integrator 4, the reset input of which is connected to the output of the imaging unit 8, and the output information input unit 9. The control input unit 9 is connected to the output of the shaper 7 and the input of the driver 8, and the output bus 12.The function of the Converter is as follows.To the input unit 1 from bus 10 receives an analog signal with a level of XIsatisfying the condition
About < I XII < A, where a level of the reference voltage of positive polarity coming from the bus 11 to the first input of the adder 2.The block 1 has a single gear ratio. At its outputs a signal of positive polarity is equal to the module XIof the input signal. This signal is applied to the second in which ihade a signal is generated, level U2which is equal to the difference between the levels of the signals at its first and second inputs:
U2A I XII
The signal level U2from the output of the adder 2 is supplied to the information input of the integrator 3. Under the action signal U2the signal at the output of the integrator 3 linearly increases (Fig.2A) with speed U2/ where is the time constant of the integrators 3 and 4.The output signal from the integrator 3 is supplied to the first input of the comparator 5, the second input of which receives the reference voltage level And from the bus 11. In moments equality of the signals at its inputs, the comparator 5 generates short pulses (Fig.2B) is supplied to the reset input of the integrator 3 and the input of the multivibrator 6.The integrator 3 under the action of pulses reset to zero, and then the signal at its output and the first input of the comparator 5 again begins to grow linearly. As a result, the output of the integrator 3 is formed sawtooth voltage (Fig.2B) with period T, determined from the relation
Denoting , the resulting ratio can be written in the form
The multivibrator 6 under the action of the pulse output equals comparator 5 generates rectangular pulses (Fig.2B) fixed amplitude To the duration of the od of the driver 7. On the inverse of the output of the multivibrator 6 is formed logically inverted signal (Fig.2D) rectangular pulses of amplitude V and duration T which act on the information input of the integrator 4.The duration T of the pulses on the information input of the integrator 4 with regard to the equation (2) is defined as
Under the action of the pulse on the information input of the integrator 4 at its output, a signal is generated, in which the duration of the pulse increases linearly from zero with a speed B/ a at the end of the pulse remains at that level (Fig.2D). Level U4signal at the output of the integrator 4 by the end of the pulse duration T his information is
Taking into account equation (3) can be written
The output signal from the integrator 4 is supplied to the information input unit 9.Shaper 7 of leading edge pulses from the direct output of the multivibrator 6 generates the sampling pulses (Fig.2E), which are received at the control input unit 9 and to the input of the driver 8. The duration of these pulses is the lowest available, but to be able to write in block 9 of the signal level at its input. TheU3where TO9the transmission coefficient of the block 9.This signal is applied to the tire 12. Taking into account equation (4) can be written
On the trailing edge of the sampling pulse shaper 8 generates a reset pulse (Fig.2ZH), which is fed to the reset input of the integrator 4. The integrator 4 is set to zero (Fig.2D). The following describes the process repeats.As a result, during one period T at the output of the block 9 and the bus 12 is formed of an analog signal level U9associated with the input signal XIthe required nonlinear dependence.Thus, the proposed functional Converter performs a non-linear transformation of the form
Y K where X and Y are respectively the input and output signals of the inverter;
And the constant level exceeding the maximum input signal level;
To a constant factor.When the conversion result is represented in the form of an analog signal.In the proposed Converter, the conversion result is generated for one period of the pulse signal, which significantly increases the performance of the Converter. FUNCTIONAL CONVERTER, servy integrator, an information input connected to the output of the adder, characterized in that it introduced the comparator standby multivibrator, two pulse shaper, the second integrator and the unit sample-hold output which is the output function of the Converter, the output of the first integrator connected to the first input of the comparator, the output Equals which is connected to the input standby-flop and the reset input of the first integrator, a second input of the comparator and the first input of the adder connected to the bus reference voltage, the output of the block selection module is connected to the second input of the adder, direct standby multivibrator connected to the input of the first pulse shaper, the output of which is directly connected with the control input of the sample-hold and through the second pulse shaper is connected to the reset input of the second integrator, the output of which is connected with the information input unit of sample-hold inverted output standby multivibrator connected to the information input of the second integrator.
FIELD: automatics and computer science, possible use in information compression equipment in television, multi-channel communications, telemetry for representing varying messages and signals in Walsh basis.
SUBSTANCE: generator has set-point element, NOT element, shift register, function number register, AND element, trigger, n-digit counter and additional AND element.
EFFECT: simplified generator due to decreased number of triggers, used as shift register digits.
3 dwg, 4 tbl
FIELD: electric communication area, in particular, engineering of orthogonal functions generators, possible use for engineering generator equipment for communication systems.
SUBSTANCE: generator of functions contains set-point generator, block for forming Walsh functions, element of one-sided conductivity, two-bit shift register, two-input commutator, multiplier and 2n group multipliers.
EFFECT: increased energetic concealment of signals, created by generator.
FIELD: engineering of specialized computer means, possible use for engineering generator equipment, and also solving boundary problems of mathematical physics.
SUBSTANCE: device contains three integrators, multiplication blocks, adder, inverter, analog-digital converter, five analog-digital converters of first group, three analog-digital converters of second group and two memory blocks.
EFFECT: expanded functional capabilities due to reproduction of all classes of orthogonal functions, being solutions of second-order differential equations.
1 dwg, 1 tbl
FIELD: measurement technology; generating test signals with preset probability characteristics.
SUBSTANCE: proposed method for generating test signal incorporating desired distribution probability function F(x) concerning occurrence of instant test signal amplitude values x(t) depends on generation of original signal r(t) with uniform distribution of instant amplitude values within the range of 0 to 1 and its functional conversion; generated as original signal r(t) is determinated signal with period T0 for which purpose signal φ(t) varied obeying known law and using desired algorithm is functionally converted.
EFFECT: enhanced precision of generated signal incorporating desired probability distribution function.
FIELD: information technologies.
SUBSTANCE: analytical method is created to produce signal probability distribution function (PDF) at the system output (initial system). This method is applicable, if: the system is described by analytical function; the system depends on accidental value; PDF of accidental value at the system input is available. There is an inverse function to function that describes system. Created method solves the following formal task. To produce PDF analytically for specified function y(x), if PDF of accidental value x in the interval [a,b] is available.
EFFECT: increased accuracy of production of probability characteristics of initial signal.
FIELD: measurement equipment.
SUBSTANCE: self-oscillation generator by Prokofyev includes an LC oscillating circuit, a scaling operating amplifier, a non-linear feedback that includes a resistive summing network for two inputs, a normally open fixed contact of an electronic switch of a pulse non-linear element that includes a RS trigger and two comparators, chains of introduction of special initial conditions of regulated oscillations (RO), which consist of a single toggle switch of RO+ and RO- modes, a double start-up toggle switch and resistors, control voltage potentiometer A, voltage sources, a start-up capacitor; regulated stabilised self-oscillations, which are steady-state as to amplitude at the output of the scaling operating amplifier, are determined with the specified ratios of parameters of the elements expressed in the form of mathematical expressions.
EFFECT: enlarging the application area of regulated oscillations.
FIELD: radio engineering, communication.
SUBSTANCE: function generator comprises a comparator circuit, a multiplier, a first adder, first and second controlled integrators, an inverter, a relay element, first and second squaring devices, a second adder, a square-root computer and a triangular waveform generator.
EFFECT: broader functional capabilities and maintaining high linearity of a triangular waveform with variation of the amplitude of quadrature harmonic signals in a wide range.
2 cl, 4 dwg
SUBSTANCE: chaotic oscillation generator contains two inductive elements, two capacitors, two resistors, a semiconductor voltage converter by means of which the characteristics of generated oscillations are regulated, and a load.
EFFECT: providing of signal modelling described by piecewise and linear differential equations characterizing the occurring periodic, quasi-periodic and chaotic oscillations.
2 cl, 5 dwg
SUBSTANCE: method for constructing an adaptive automatic excitation control system, which consists in the fact that the coefficients of the stabilization channels of the automatic excitation controller are adjusted for changing the values of the parameters of the equivalent circuit "generator-line-infinite buses (IB)" and the voltage regulator gain so that the transient processes under the disturbing and controlling actions have an aperiodic or a nature close to it.
EFFECT: determination of the optimal adjustment of the AEC stabilization channels for various circuit-mode operating conditions of the generator, adaptation of the automatic excitation control systems to work with different types of synchronous generators.
SUBSTANCE: method contains stages, at which the list of statistical characteristics of the numeric sequence is set, that includes at least an mathematical expectation and a dispersion of the logical unit occurrence frequency in a bit numerical sequence; for each diode from a set of the similar diodes: a diode is noted from a set of the similar diodes, the diode is set in the analogue noise generator of the measuring device; statistical characteristics of the numeric sequence is received, related to the detected diode, at the output of the measuring device; the data of the statistical characteristics of the detected diode is saved; a pair of diodes is selected from the set, performing the following actions: a pair of diodes is noted having the maximum difference of the mathematical expectation with a perfect value and the minimum difference of the expected values in the pair; a pair of the diodes having the minimum difference values of the dispersion is selected from the set of pairs of the diodes with a minimum difference of the mathematical expectations, the position of the selected pair diodes is determined in the analogue noise generators of the random number generator, performing the following actions: the diodes from the selected pair are set in the analogue noise generators based on the random selection, the details of the set diodes are noted for each of the analogue noise generator (position 1), the mathematical expectation of the number sequence is received at the output of the random number generator, its value is saved, the diodes are swapped in the analogue noise generators, the details of the set diodes are noted for each of the analogue noise generator (position 2), the mathematical expectation of the number sequence is received at the output of the random number generator, the value of the mathematical expectation of the numerical sequence is compared at the output of the random number generator for position 1 and position 2, the position of the diodes with the minimum deviation from the set value of the mathematical expectation and with the minimum deviation from the set value of the dispersion of the numeric sequence are selected at the output of the random number generator, the diodes are set in the selected position in the analogue noise generators for use in the random number generator.
EFFECT: simplification of the process of preparing a random number generator for a subsequent work.
2 dwg, 4 tbl