SU483794A1 - Multistable pulse frequency element - Google Patents

Description

one

The invention relates to radio automatics, can be used in the development of memory circuits, voltage converters - frequency and frequency - voltage.

A multistable pulse frequency element is known, which contains a controlled relaxation generator and a discriminator.

The purpose of the invention is to expand the functionality.

The proposed element is characterized in that it additionally introduces an integrator, the input of which is connected to the discriminator output, and the output to the input of the controlled relaxation generator. The discriminator is designed as a series-connected time selector, a counter, and a code-voltage converter.

FIG. I shows a block diagram of the device; in fig. 2 - graphs that show his work.

A multistable frequency-pulse element consists of a controlled relaxation generator 1, a discriminator 2, an integrator 3. The discriminator includes a time selector 4, a counter 5, a transducer code - voltage (pn) 6.

The device works as follows.

The sequence of pulses from a controlled relaxation generator 1 with frequency / rg is fed to discriminator 2. The signal

From the discriminator, the integrator 3 tunes the oscillator frequency until the output voltage from the discriminator is zero. The frequencies of the relaxation generator for which these conditions are fulfilled are stable states of the system. Switching from one steady state to another can be done by applying an external force to the integrator or generator.

The discriminator works as follows.

The time selector 4 opens for a period determined by the frequency period of the controlled relaxation generator 1 (Trg) and transmits pulses with the frequency of the synchronizing signal (Tc) to the counter 5. The meter has steady states. The number k written into it is converted by block 6

at a discrete voltage f / out, which is zero at and more or less than the pool at. The characteristic dependence of L / O on the number in the meter is shown in FIG. 2a With any number of pulses L,

incoming pa counter, the number in the counter is within. The dependence of the output voltage of the discriminator on the number of pulses received through the temporary selector, with n stable states

The meter is shown in FIG. 26. The number of pulses arriving at the counter, the Number of stable states of the circuit / - max - mindg mc-hm -) where JVniaKc, jVniHH is the maximum number of pulses that can enter the counter when the controlled oscillator period changes in the Dgr range. Or, in view of the foregoing. IR. The number of steady states can be adjusted by changing p or Tc. The subject of the invention 1. A multi-stable pulse-frequency element containing a controlled relaxation generator and a discriminator, characterized in that, in order to increase the number of stable states and ensure the regulation of the interval between the discrete values of the generator frequency, an integrator is added to it, which is connected to the discriminator's output, and the output to the input of a controlled relaxation generator. 2. The element according to claim 1, characterized in that the discriminator is designed as a series-connected time selector, a counter, and a code-to-voltage converter.

5 Fig 2