JPH0332113B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a differentiating circuit device.

[Conventional technology]

FIG. 4 is a diagram showing the functional configuration of a conventional differentiating circuit device. In the figure, 1 is an absolute value processing unit that calculates the absolute value of input data _E1 , and 2 is a unit that differentiates absolute value data _E2. This is a differential processing section.

Next, the operation will be explained. In Figure 4,
Input data _E1 passes through the absolute value processing section 1 and becomes absolute value data _E2 , and this absolute value data _E2 passes through the differential processing section 2 and becomes differential data _E3 .

Now, let us consider the operation when the waveform 5 of the input data _E1 shown in FIG. 5a is input to the circuit shown in FIG. 4.
Input data E ₁ of waveform 5 in FIG. 5 is converted into waveform 8 of absolute value data E ₂ having an inflection point P shown in FIG. 5b by the absolute value processing section 1 of FIG.

Next, the absolute value data E ₂ is outputted by the differential processing section 2 of FIG. 4 as a waveform 9 of differential data E ₃ shown in FIG. 5 c.

[Problem that the invention seeks to solve]

Conventional differentiating circuit devices are configured as described above, so when differentiating data E ₂ that has undergone absolute value processing, it is necessary to differentiate discontinuous values such as inflection points, resulting in large errors. There were problems such as the occurrence of

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a differentiating circuit device free from theoretical errors in differentiating processing.

[Means for solving problems]

The differential circuit device according to the present invention stores the sign of input data in a sign determination processing section, differentiates the input data as continuous data in the differentiation processing section, and uses the differential result as a sign stored in the sign determination processing section. is multiplied by the sign multiplication processing section.

[Effect]

The differentiating circuit device according to the present invention stores the sign of input data in a sign determination processing section, performs differentiation on the input data as continuous data, and multiplies the previously stored sign, thereby reducing the theoretical error. No differential processing.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 2 is a differentiation processing unit that differentiates the input data E ₁ , 3 is a sign judgment processing unit that judges the sign of the input data E ₁ , and 4 is a sign judgment processing unit 3 that first differentiates the input data E 1.
This is a sign multiplication processing unit that multiplies the differential processing result E ₄ by the sign E ₆ saved in .

Next, the operation will be explained with reference to the flowchart shown in FIG. For the input data _E1 , the code _E6 at the time of input is determined and stored in the sign determination processing section 3 (steps 3-2 and 3-3). Further, the data _E1 that has passed through the sign determination processing section 3 is differentiated by the differentiation processing section 2 (step 3-4), and becomes data _E4 .
The differential result data _E4 is multiplied by the code _E6 stored in the sign determination processing section 3 (step 3-5).
By doing this, the differential result E ₅ is obtained (step 3
-6).

Now, let us consider the operation when the waveform 5 of the input data _E1 shown in FIG. 2 is input to the circuit shown in FIG. 1.
First, input data E ₁ of waveform 5 in FIG.
The sign determination processing of the sign determination processing unit 3 shown in the figure determines whether the sign at the time of input was positive or negative, and the value E ₆ is set as 1 if it is positive or -1 if it is negative. Save to.

Since this sign determination processing section 3 only determines the sign and stores the result without performing arithmetic processing on the input value _E1 , the next input data to the differential processing section 2 will also be the input data _E1 .

Since this differentiation processing section 2 can differentiate continuous values such as waveform 5 in FIG. 2, the differentiation result is also continuous as in waveform 6 in FIG _{. 2} , which is the differential value E ₄ of input data E 1. Output values without theoretical errors can be obtained.

Next, the differential value obtained from the differential processing section 2
_E4 is input to the sign multiplication processing section 4. Here, in order to ensure that the input value of the differential processing unit 2 is continuous and free from theoretical errors when performing the differential processing, the input value of the differential processing 2 is intentionally differentiated even if it is a negative value. Therefore, if the sign of the value of the input data E of the differential processing section 2 is negative among the differential value E ₄ that is the output of the differential processing section 2, it is necessary to invert the sign.

Therefore, by the sign judgment process of the sign judgment processing unit 3, when the sign of the input data E ₁ is positive, a value of 1 is stored in the sign storage term E 6, and when it is negative, a value of -1 is stored in the sign storage term E ₆ .
By multiplying this sign preservation term _E6 by the differential value _E4 , when the value of the input data _E1 is negative, the sign of the corresponding differential value _E4 can be made positive, and as a result, the differential value _E4 This means that we have taken the absolute value of .

Looking at this in FIG. 2, if we differentiate the sign of waveform 5 of input data E ₁ as it is, we will find the differential value E ₄ of waveform 6, and among the waveform 6 of this differential value E ₄ ,
By inverting the sign of the waveform of the differential value _E4 corresponding to the negative part of the waveform 5 of the input data _E1 ,
Waveform 7 of the output result _E5 of the differentiating circuit is determined.

In the above embodiment, continuous input data was handled, but even if the input data is discontinuous, such as a full-wave rectified waveform, the differential processing is performed after the input data is made into a continuous waveform by sign manipulation, and the differential result is By performing an operation to restore the sign of the part whose sign has been manipulated, it is possible to perform differential processing that does not include errors in discontinuous parts.

In this way, it is possible to think of discontinuous data that can be made continuous once as continuous data, then subjected to differential processing, and then returned to its original state.

〔Effect of the invention〕

As described above, according to the present invention, the sign of input data is stored in the sign determination processing section, the input data is differentiated as continuous data in the differentiation processing section, and this differentiation result is stored in the sign storage processing section. Since the code is multiplied by the code in the code multiplication processing unit, there is an effect that a highly accurate differential processing result with no theoretical error can be obtained.

[Brief explanation of the drawing]

1 is a block diagram showing a differential circuit device according to an embodiment of the present invention, FIG. 2 is an input/output waveform diagram of each part of FIG. 1, and FIG. 3 is a flowchart of an embodiment of the present invention. FIG. 4 is a block diagram of a conventional differential circuit device, and FIG. 5 is an input/output waveform diagram of each part in FIG. 2 is a differential processing section, 3 is a code storage processing section, and 4 is a code multiplication processing section. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1: a sign determination processing section that determines the sign of input data; a differentiation processing section that performs differential processing on the input data as continuous data; A differentiating circuit device comprising a sign multiplication processing unit that performs multiplication.