SU613336A1 - Functional converter of three variables - Google Patents

Description

one

The invention relates to computing and can be used in devices for controlling moving objects and technological processes.

A functional transducer is known, which contains operational amplifiers, a control unit and logic elements, 1.

However, this converter requires the use of a large amount of equipment.

The closest technical solution to the invention is a functional converter, which, like this converter, contains a control unit, three inputs of which serve as converter inputs, and two outputs are connected to the corresponding inputs of a scaling unit and switch, which are connected in series 2.

Such a converter has a bulky design and low reliability.

The purpose of the invention is to simplify the design and increase the reliability of the converter.

This is achieved by introducing into the converter the playback units of the families of convex, concave and saddle functions of three variables whose inputs are the converter inputs, and the outputs are connected to the corresponding inputs of the switch, each of which

maintaining the families of convex, concave and saddle functions of three variables contains resistors, bias voltage sources and a pair of field-effect transistors, whose sources are connected to the zero potential bus, drains to the output of the unit and the common resistor to the first of its inputs, and the gates through the corresponding the resistors are connected to the second and third inputs of the block, to the corresponding source of bias voltage and to the zero potential bus.

FIG. 1 shows a structural diagram of the functional converter of three variables; in fig. 2 is a schematic diagram of playback units of families of convex, concave, and saddle functions of three variables; in fig. 3 shows the family of response surfaces of the playback units of the families of convex, concave, and saddle functions of three variables.

The functional converter contains a control unit 1, a scaling unit 2, a switch 3 and blocks 4, 5 and 6 of the reproduction of families of convex, concave and saddle functions of three variables, respectively.

The playback blocks 4, 5, and 6 of the families of convex, concave, and saddle functions of three variables, respectively, contain a pair of field-effect transistors 7, sources 8 of the bias voltage, resistors 9-15, output

16 and inputs 17, 18 and 19 of the independent variables x1, x2 and x3, respectively.

Functional Converter works as follows.

The voltages Ui, 1/2, Us of a fixed current of fixed polarity, which simulate the input variables x, x2, x3, are supplied to the inputs 17, 18, 19 of block 4 (5, 6), respectively. Voltage f / i changes the voltage of the drain of transistors 7, voltage 1/2, f / 3– resistance of the channels of transistors 7 and, ultimately, voltage across the drain. As a result, the voltage at the output 16 is some function of x, x2, x3, circuit parameters and bias voltages

z-0 {xl, x2, x3; RI, U ,,,

where f l4-7; , 2; UQ cut-off voltage of transistors 7

on the shutter; RKO - initial channel resistance

transistors 7.

By a certain choice of parameters of resistors 9-15 and bias voltage sources 8, block 4 (5, 6) can be configured to implement convex, concave and saddle surfaces at an appropriate scale.

The input signals x1, x2, x3 are fed to the inputs of control unit 1 and the inputs of blocks 4, 5 and 6. The control unit determines the corresponding zone of the function definition area and generates control signals for switch 3, connecting the corresponding block 4 (or 5 or 6) to the input of the mastabilizing unit 2. According to the signal of the control unit 1, the unit 2 is adjusted to the corresponding transmission coefficient providing the required scale of the output dependence (x, x2, x3).

Claims (2)

1. USSR author's certificate №423145, cl. G 06J 3/00, 1974. 2. For the number 2199597/24, cl. G 06G 7/26, 1975, which adopted the author's certificate. to const2 -hz Fig.Z