SU424144A1 - DIFFERENTIATING DEVICE - Google Patents

Description

one

This invention relates to the field of computing.

Known differentiating devices containing a reversible counter, outputs connected to the first group of inputs of a binary multiplier, the second group of inputs of which is connected to the outputs of a frequency divider connected to an input to a reference frequency generator, the output of the binary multiplier connected to one of the inputs of the subtracting unit, assembly circuit, frequency -pulse multiplier and sign trigger.

The proposed device differs from the known ones in that the outputs of the subtracting device are connected via a sign trigger, respectively, to the subtraction and addition inputs of a reversible counter and simultaneously via an assembly circuit to the input of a frequency-pulse multiplier connected to the main input of the reversible counter and to the output of the device, moreover, the sign output of the device is connected to one of the outputs of the sign trigger.

This has increased the speed and increase the accuracy of the device.

The block diagram of the device shown in the drawing.

The device contains a reversible counter I, a binary multiplier 2, a frequency divider 3, a generator 4 of the reference frequency, subtracting

block 5, assembly circuit b, pulse frequency multiplier 7, sign trigger 8.

Differentiating device operates as follows.

When the frequency Fx (t) arrives at the positive input of the subtracting unit 5, a difference signal Fi (t) appears at its output, which is multiplied by K times where / C is the multiplication factor of the frequency-pulse multiplier 7. Multiplied signal fz (t) arrives at the output of the differentiating device and at the input of the reversible counter 1. The signal Fz (t) is integrated and at the output of the binary multiplier 2 a frequency Fy (t) is formed,

proportional to reversible counter code 1.

This frequency is fed to the negative input of the subtracting unit 5, subtracted from the signal Fx (i) - At the same time, the signal F, j (f) is delayed by the value T compared to

with f.rОLaw of changing the output frequency of a differentiating device / g (O with a linearly varying input signal Fx (t) can be defined by the expression:

-4dF. (I)

T

1 - e

dt

In an established manner

mode at.

30 we have: that is, the device provides the first derivative of the input signal. It can be shown that the methodological error of the device when a parabolic signal arrives at its input will be determined by the expression: T (t) K dt and the transient time can be found from the expression: In o. Subject of the Invention Differentiating device containing a reversible counter, outputs 20 5 10 15 foamy with the first group of inputs of a binary multiplier, the second group of inputs of which is connected to the outputs of a frequency divider connected to the input of a reference frequency generator, and the output of the binary multiplier is connected to one of the inputs subtractive unit, assembly circuit, pulse frequency multiplier and sign trigger, characterized in that, in order to increase speed and increase the accuracy of the device, in it the outputs of the subtractor The block is connected via the sign trigger, respectively, to the subtracting and adding inputs of a reversible counter and through the assembly circuit to the input of a pulse-frequency multiplier connected to the main input of the reversible counter and to the output of the device, the sign output of the device connected to one of the sign trigger outputs.

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