SU1012278A1 - Differentiating device - Google Patents

Abstract

DIFFERENTIAL ENGLISH ITS EQUIPMENT, containing an angular-digital converter, connected by an information input to the input bus of the argument, VE moves to the first group of inputs of the code comparison unit and to the information inputs of the register connected to the second group of inputs of the comparison unit. , the direct and inverse outputs of which are outputs of the sign of the derivative device, in particular, in order to expand its functionality by obtaining a derivative module, the element is additionally introduced into it OR, connected by inputs to the direct and inverse outputs of the code comparison unit, and output to the control input of the register, and to the input of the module of the derived device-g b

Description

-JN

-

N

ND

from H

five

CX5 The invention relates to automation and computing, in particular to time differentiation devices, analog and digital signals. A differentiating device is known that contains two comparators, a parallel counter, a digital-to-analog converter, and an OR OR flj element. It is also known to differentiate a device comprising a storage sampling unit, a differential amplifier, a module allocation unit, an amplifier, a low-pass filter, and a controlled frequency generator f 2. A common drawback of the known devices is the limited scope as they allow to determine the sign and the module time derivatives of signals presented in analog form only. The closest to the invention is a differentiating device containing an analog-to-digital converter connected by an information input to the argument input bus, and outputs to the first group of inputs of a code comparison block and to information inputs of a register connected by outputs with a second group of inputs of a code comparison block, the direct and inverse outputs of which are outputs of the sign of the derivative device, the first and second control inputs of the register being connected respectively to the trigger output and to the first output eaten a clock pulse connected by a second output to the first trigger input and to a control input of an analog-digital converter, and a third output to the first inputs of the first and second And elements connected by the second, inputs respectively to the direct and inverse outputs of the code comparison unit, and the output the first element And is connected to the second input of the trigger, and the device register is made on the memory register and the group of elements And, the first inputs of which are information inputs of the register, and the second and third inputs of the second The eye and the third control inputs of the register 3. The disadvantage of the prototype is its limited functionality, since it allows to determine only the sign of the derivative of the input signal presented in analog or digital form, and does not allow to determine the modulus of the derivative of the input signal. The purpose of the invention is to expand the functional possibilities of obtaining a modulus of the derivative. For this purpose, a differentiating device containing an analog-to-digital converter connected by the information input to the input argument bus, and outputs to the first group of inputs of the code comparison block and to the information inputs of the register connected by outputs to the second group of inputs of the code comparison block, direct and the inverse outputs of which are the outputs of the sign of the derivative device, an OR element is added, connected by the inputs to the direct and inverse outputs of the code comparison block, and the output to the control input p Giustra and to the output of the modulation device derivative. The drawing shows a diagram of the proposed. Differentiating device. The device contains an analog-to-digital converter 1 connected by an information input to the argument input bus, and outputs to the first group of inputs of block 2 of code comparison and to information inputs of register 3. Registers 3 are connected to the second group of inputs of block 2 of code comparison, direct and the inverse outputs of which are the outputs 4 and 5 of the sign of the derived device. The element OR b is connected by inputs to the direct and inverse outputs of block 2 of the code comparison, and the output to the control input of register 3 and output 7 of the Derivative Device Module. The device works as follows. Using the analog-digital converter 1, the input signal X, presented in analog form, is converted into a parallel code that is fed to the first group of inputs of block 2. If, for example, when this is the second group of inputs of block 2, the code is zero, then Directly, a single signal appears at the output of block 2, which arrives at the output 4 of the X character of the derived device and, through element OR 6, writes into the register 3 the output code of the converter 1. As a result, the codes of the inputs of block 2 are the same and the output of block 2 is set to zero th signal. If in the next conversion cycle of the analog signal at the output of the converter 1, the code exceeds the register code 3, then the operation of the device proceeds as described. As a result, as the input analog signal rises, single pulses are generated at the output of the OR element and at the device output 7, the frequency of which is determined by the modulus of the analog signal growth rate, i.e. module) C | its derivative. While reducing the input analog ratio of the codes at the inputs of lock 2, the inverse and single pulses -3, 10122 are suppressed at the inverse output ka 2. In the case of differentiation of the input signal represented in digital form, the device operates in the same way as described with the difference that the input code is directly supplied to the first group of inputs of block 2 and the information inputs of register 3. The proposed device can have a range of differential frequencies from infra-low to ultrasonic and has a sensitive 784 for a single quantization step of the analog-digital converter 1 (the youngest bit of the kod2 comparison block 2) This device, unlike the prototype, has broader functionality, since it allows you to define not only the sign, but also the module The additional component of the considered device is a large sensitivity to changes in the differentiating signal, since, unlike the prototype, it does not depend on the frequency of the clock generator.

Claims (1)

DIFFERENTIATING DEVICE / containing analog-to-digital conversion-! caller connected by information An input to the input bus of the argument, and B3 = moves to the first group of inputs of the code comparison unit and to the information inputs of the register connected by the outputs to the second group of inputs of the code comparison unit, the direct and inverse outputs of which are. the outputs of the sign of the derivative device, distinguished by the fact that, in order to expand the functionality by obtaining the derivative module, an additional OR element is connected to it, connected by inputs to the direct and inverse outputs of the code comparison unit, and the output - to the control input of the register ^ and to the output of the module of the derivative device. (Λ о ь Μ O QO