SU590776A1 - Functional converter - Google Patents

Description

one

The proposed functional converter relates to devices for reproducing functions in an orthogonal basis (for example, in the basis of trigonometric functions, Walpd, Haar functions, etc.) and can be used as a driver of analog signals with a given law of variation in shape, duration, interval, and effective width frequency spectrum. In particular, it can be used in radio devices and analog computing.

A functional transducer is known that reproduces oscillations in the system of basic functions 1.

The closest to the technical essence of the invention is the converter 2, which contains the generator of orthogonal functions, n adders, n elements I, the decipher and the counter, and the control output of the generator of orthogonal functions is connected to the first input of the counter, the outputs of the counter through the decipher, with the first inputs of the corresponding elements And, the second inputs of which are connected with the outputs of the corresponding adders, and the outputs of all elements And are connected to the output of the converter.

The disadvantage of the known converter is the limitation of the class of reproducible functions due to the lack of

opposite in sign of orthogonal functions.

The purpose of the invention is the assignment of a class of convertible functions.

This is achieved by introducing / those inverters, m of switches and a control unit, each of the hectares of outputs of a group of outputs of the generator of orthogonal functions connected to the first input of the corresponding switch, the second inputs of which through the corresponding inverter are connected to the corresponding output of groups of outputs of an generator of orthogonal functions one of the m switches is connected to two corresponding outputs of the output unit of the control unit, the control output of the control unit is connected to the generator input rtogonalnyh functions, the first and second outputs of the control unit - according to the second and third counter inputs and outputs of all m nodsoedineny switches to respective inputs of n adders.

The block diagram of the converter is represented in the drawing.

It contains a generator of 1 orthogonal functions, which has m outputs, n adders, n elements 3i-3p, a decoder 4, m switches 5i-5m. tons of inverters 6i-6, n, counter 7, control block 8.

The switches 5i-5m, under the influence of signals from the outputs of the control unit 8, do not send orthogonal functions directly or with the opposite sign to their outputs according to a predetermined program.

CyAmators 2i-2p are designed to weight the sum of signals that are available from the outputs of the switches 5i-5m. The number of inputs of each adder is equal to the number of used orthogonal signals.

Elements 3i-3p make alternate switching of signals from the outputs of adders to output 9 of the converter. Elements are controlled by the sigals from the outputs of the decoder 4, the inputs of which are connected to the outputs of the reversible counter 7. The counter counts the number of cycles of the generator of orthogonal functions (the cycle of the generator is determined by the orthogonality of the generated functions) and can work in forward, reverse and reverse modes .

The converter within the first cycle of operation of the generator of orthogonal functions works in the following way.

In the initial state, the unit 7 is set to one. In this case, the resolving potential from the output of the decoder 4 is fed to the element AND 6i, connecting the output of the adder 2i to the output 9 of the converter. After starting from block 8 of the generator 1 of orthogonal functions, signals of a certain system of basic functions appear on its outputs, which, through the inverters 6i-6m, reach the inputs of two-channel switches 5i-5m- through the inverters under the influence of control signals from block 8. within a given cycle, a part of the functions of the same sign, and a part of the opposite (according to a given program) that passes to the inputs of the adder 2i, are interpreted according to the specified Fourier coefficients and summed. From the output of the adder 2i, the signal enters through the AND 3i element at the output 9 of the converter, forming an oscillation, the values of which are proportional to the values of the desired function on the time interval corresponding to the first cycle.

At the end of the first cycle of the generator 1, a sigpal okopchapi cycle is formed, which, when it enters the direct input of the counter 7, increases the number contained in it by one, which leads to voltage on the next output of the decoder 4. Due to this element I 3i closes and opens the element IZ, connecting the adder 22 to the output 9 of the converter. The operation of the converter during the second cycle is similar to the previous cycle: the same orthogonal functions are formed, the signs of these functions change or remain at the outputs of the switches 5i-5m, the "weight of functions in the adder 22 changes. At the same time, the signal on output 9 is proportional to the values of the function sought on the time interval corresponding to the second cycle, etc.

At the end of the last cycle corresponding to the connection through the last element I Zn of the output of the last adder 2p to the output 9 of the converter, the operation of the converter to form the desired oscillation ends. As a result, the output oscillation is formed at the output 9, composed of its individual parts.

With the reverse mode of operation of the counter 7, i.e. the oyros of the elements And first in the MOiM pr (D 32, ..., Sn), and then in the reverse (Zn-th

Sn-2, ..., 3i) in a direction, a symmetric function is formed at the output 9. The reversal is controlled by the influence of control signals from the outputs of block 8 to the addition inputs (direct polling direction) or subtraction (reverse polling direction).

Introduction of inverters and switches controlled by sigpals from the outputs of the control unit, as well as a counter (reversible)

allows for the use of both positive and negative "weighting of orthogonal functions, when approximating the desired oscillations by a number of Fourier, significantly expand the class of

of oscillations, as well as halving the number of blocks (adders, I elements) of the converter in the case of reproduction of symmetric functions, which in sum expands the functionality of the converter

its scope of application.

Formula and 3 about b and e and

A functional converter containing a generator of orthogonal functions, n adders, I elements, a decoder and a counter, the control output of the generator of orthogonal functions connected to the first input of the counter, the outputs of which through the decoder are connected to the first inputs of the corresponding elements I, the second inputs of which are connected to the outputs the corresponding adders, and the outputs of all elements And are connected to the output of the converter, which is the fact that, in order to expand the class of convertible functions, t and divers, t switches and

a control unit, each of the / p outputs of the group of outputs of the generator of orthogonal functions is connected to the first input of the corresponding switch, the second inputs of which through the corresponding inverter are connected to the corresponding output of the group of outputs of the generator of orthogonal functions, the control inputs of each of the switch m are connected to two corresponding outputs of the group control unit outputs

the control output of the control unit is connected to the generator input of the orthogonal functions, the first and second outputs of the control unit are connected to the second and third inputs of the counter, respectively, and the outputs of all m switches are connected to the corresponding inputs of all n adders.

Sources of information, iriy toe into account and examination 1. USSR author's certificate №532109, cl. G 06G 7/26, 1975.

2. USSR author's certificate №463991, cl. G 06J 3/00, 1972.