SU473165A1 - Periodic signal stabilizer - Google Patents

Description

difference bz (fng. 2h). Its spectrum consists of 11c, rzoy harmonics, proportional error of the source, and higher. Useful information is enclosed only in the first of them. Unlike the prototype, its allocation is made desensitized by compensating for the higher components. An additional block 5 is used for this. OiH is necessary for the formation of a oscillation, In which all odd harmonics are present, except the first. Such a block is arranged as follows. An adder is included at its input, sinusoidal oscillations from which a P2 multiplier is supplied. A sinusoidal signal is also supplied to the second input of the latter. The constant voltage taken from the output of the non-multiplier is transformed into a rectangular one, is amplified, and through the negative feedback circuit is fed to another input of the addition circuit. At a sufficiently large gain ratio of the rectangular voltage amplifier at the output of the Adder, oscillations are distinguished, the spectrum of which does not contain the first harmonic f / 4 (Fig. 2d).

Subtracting the signal obtained in this way / 4 (Fig. 2d), in which there are only the highest components of the spectrum, from the difference f / 3 (Fig. 2c), consisting of the first harmonic and the higher ones, receive compensation for all harmonics except the first Uz ( Fig. 2d). After amplification, it is supplied to the adder 2 as a correction voltage. Its addition to the signal of the master oscillator helps to restore the specified value of the output value with high accuracy.

In the proposed stabilizer, in order to reduce the nonlinear distortions of the output voltage, an additive KOi error system error is performed, allowing

exclude nonlinear blocks from the main path and replace them with linear summator.m. In order for such correction to become possible, it is necessary to select the first harmonic of the difference signal,; obtained at

comparing output and reference values. This problem is solved in the proposed device by compensating for the higher components of the spectrum. The compensating form voltage: is supplemented by an additional unit and is a square wave from which the first harmonic is excluded. The first harmonic is used as a corrective signal, noted by subtracting the signal containing the fundamental and the highest from the signal in which there are only higher ones.

Subject invention

A periodic signal stabilizer containing a master oscillator and a comparison unit connected to the output through an amplifier limiting device, characterized in that, in order to reduce the nonlinear distortion of the output voltage, an adder is inputted, the first input of which is connected to the output of said master oscillator, and the second through an amplifier AC voltage is connected to the output of the unit compared, one of the inputs of which is connected to the output of the stabilizer and the output of the above adder directly, and the other through the driver tra.

U, lU,

five)

B

,

.

and.

d)

N

/

3)

R

FIG. 2