SU399048A1 - GENERATOR OF RANDOM SIGNALS - Google Patents

Description

The invention relates to the field of automatic control, as well as to the field of engineering psychology for the study of the work of operators, for example, in the study of tracking processes that constitute a crucial part of the activity of a human activator.

Known random signal generators of infra-low frequency are known, which contain a clock pulse generator with a timing chain, the output of which is connected to the input of the friooiuero register, having a modulo two G feedback feedback, Schmptt trigger, the input of which is connected to the output of the shift register, and the output connected to the lowpass filter input.

However, well-known generators have a short repetition period and a pseudo-random signal spectral density.

With the increase in the duration of the period of the second and the density of the pseudo-random signal in the proposed generator, the output of the low-pass filter is connected to the input of the prem of the generator of 1 pulse generator.

The drawing shows the block diagram of the proposed geierator.

The random signal generator contains a generator of 1 clock pulses, which includes the time for the jerky string 2 of resistor 3 and capacitor 4. Generator output ;. / clock ims are connected to the input of the n-bit shifting register 5 with feedback through the adder 6 modulo two, the inputs of which are connected to the outputs of the // and th and n-th bits, and the output to the input of the shifting register 5. Schmitt trigger input 7 G keys to the output of the shift register 5, l output - to the input of the filter 8 low frequencies,

the chute of which is connected to the input of the time of the master chain 2 geierator / clock emuls.

The proposed construction works as follows.

A 1-T generator: ctemi-nmi-puls produces an infra-low-frequency sequence of clock pulses that arrive simultaneously for all bits of the shift register 5. The feedback signal that arrives

from the z-th and the p-th-th bits of the shift register 5 through the adder 6 modulo two, is fed to the first bit of the shifting switch 5, thereby gaining feedback circuit. If before starting work in register 5 is written

a certain number, then the feed of each clock imiulea number in the shift register 5 IU 1.

Thus, at the output of the shift register 5, a pseudo-random sequence of uncorrelated binary is formed;

codes, the incoming. “and the trigger W mptta 7, which converts it into a generalized telegraph signal. This signal is then filtered in the low-pass filter 8 to obtain a continuous signal, from the output of the filter 5 a pseudo-randomly varying signal is supplied to the resistor 3, the time of the driving chain 2 of the generator / clock pulses. As a result, the oscillation frequency of the generator / clock pulses changes according to a pseudo-random law, which leads to an increase in the repetition period and the spectral density of the pseudo-random voltage at the output of the proposed device.

Subject invention

An infra-low frequency random signal generator containing a clock pulse generator with a timing chain, the output of which is connected to the input of the shift register, having a modulo-two adder for feedback, a Schmntt trigger, the input of which is connected to the output of the shift register, and the output connected to the input low pass filter, characterized in that, by increasing the duration of the repetition period iH of the spectral density of a pseudo-random C 1 H1, the output of the low pass filter is connected to the input imtsulsov clock generator.