The function generator
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