SU1116523A2 - Polyfunctional generator - Google Patents

Abstract

MULTI-FUNCTIONAL GENERATOR auth.St. 721892, I differ from the fact that, in order to reduce the nonlinear distortion of the output sinusoidal signals, the output of the second integrator is connected to the input of the second controlled voltage divider via an additionally introduced nonlinear functional converter.

Description

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S The invention relates to radio engineering and can be used in measuring devices. According to the main author. St. No. 721892 is known a multifunctional generator containing a comparator and adder, the first input of which is connected to the output of the first integrator, the second. input - to the output of the second integrator through a feedback element, as well as the first and second controlled voltage dividers, the control inputs of which are combined, the input of the first one is connected via a comparator not output of the adder, and the output to the input of the SECOND integrator, output to The latter is connected to the input of the second controlled voltage divider, the output connected to the input of the first integrator 1. A disadvantage of the known multi-functional generator is the insufficiently low nonlinear distortion. The purpose of the invention is to reduce the nonlinear distortion of the output sinusoidal signals. This goal is achieved by the fact that in a well-known multifunctional generator containing a comparator and an adder, the first input of which is connected to the output of the first integrator, the second input is connected to the output of the second integrator via a feedback element, and the first and second controlled voltage dividers controlling the input of which is combined, the input of the first of them is connected by a cut of the comparator to the output of the adder, the output is connected to the INPUT of the second integrator whose output is connected to the input of the volt controlled by the voltage divider, the output is connected to the input of the first integrator, the output of the second integrator is connected to the input of the second controllable voltage divider through the further the Introduction ny, nonlinear functional preo photoelectret. The drawing shows the structures on the electrical circuit of the multifunctional generator. The multifunction generator contains an adder, the first 2 and second 3 integrators, a comparator 4, feedback element 5, the first 6 and second 7 controlled voltage dividers, a nonlinear functional converter 8. The multifunction generator works as follows, Positive (+ and t) or a negative (-Urn) signal from the output of comparator 4 is multiplied by the coefficient of the first 6 controlled voltage divider and integrated by a third integrator, at the output of which a linear-varying signal is obtained. This signal, passing through the nonlinear functional converter 8, is converted with a certain accuracy into a harmonic signal, which is also multiplied by the coefficient i of the second 7 controlled voltage divider and integrated by the first 2 integrator, while the main harmonic of the harmonic signal from the output of the second 7 control The variable voltage divider is shifted by the first 2 integrator in phase by 90, and the higher harmonics are filtered. The signals from the outputs of the first 2 and second 3 integrators are fed to the inputs of the adder 1, the output of which controls the switching of the comparator 4, which ensures the self-oscillatory mode, In the auto-oscillatory mode, the generation frequency | L.,. K. f fl Xj K-Xj X -and 5m 2- KKg. , 2Т | - - where l is the width of the hysteresis loop of the comparator 4; Vfrt is the amplitude of rectangular signals at the output of comparator 4; the amplitude of the triangular oscillations at the output of the second 3 integrator; - transmission coefficient of feedback element 5; K, K Kt transfer coefficients sootsetcTBeHHo nonlinear functional converter 8, second 3 and first 2 integrators; - transmission coefficient of the first 6 and second 7 controlled voltage dividers;

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3m

the amplitude of sinusoidal oscillations at the output of the nonlinear functional transducer 8;

X is the amplitude of sinusoidal oscillations at the output of the first 2 integrator;

The% amplitude of the sinusoidal signal at the output of the second 7 controlled voltage divider.

The condition of the amplitude of the generated signals with a smooth change in frequency is provided, as in the multifunctional generator according to autor.N. 721392, by a synchronous change in the coefficients of the first 6 and second 7 controlled voltage dividers.

Thus, the proposed generator, in addition to the rectangular and triangular signals obtained at the outputs of the comparator 4 and the second 3 integrator, forms a pair of mutually orthogonal harmonic signals that are obtained at the outputs

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nonlinear functional preo. 8 and the first 2 integrator.

According to fl, a harmonic signal at the output of the first 2 integrator in the generator is obtained directly by filtering the triangular signal by the first 2 integrator. In the proposed multifunctional generator, the triangular signal passes through a non-linear one. functional transducer 8, which approximates the function

where | x |

The first 2 integrator, by additional filtering of the higher harmonics of the output signal of the nonlinear functional converter 8, allows reducing the nonlinear distortion factor by 5-10 times and obtaining a harmonic signal with 0.0010.2% accuracy. In addition, the set of synchronous output signals of the multifunctional gene generator is expanded.

Claims (1)

MULTI-FUNCTIONAL GENERATOR according to Autosw.No. 721892, with the fact that, in order to reduce non-linear distortions of the output sinusoidal signals, the output of the second integrator is connected to the input of the second controlled voltage divider through , nonlinear functional converter. 1 1 16523