JPS60105079A - Function generator for multi-dimensional input - Google Patents

Abstract

PURPOSE:To attain the output of the multi-type function by supplying plural analog signals to convert them into digital signals, and to designate an address and converting and outputing a data inputted to the address into analog signals. CONSTITUTION:Two analog inputs are supplied from input devices 1 and 2 and then converted into digital signals by A/D converters 5 and 6 and via amplifiers 3 and 4. These digital signals X and Y undergo the arithmetic through an operator 7, and the output of this arithmetic is used as an address designating signal of a memory 8. A signal Z of data is previously supplied to the address of the memory 8. Then the signal Z is read out of the memory 8 and sent to a D/A converter 10 via a buffer register 9 to be converted into an analog signal. This analog signal is amplified by an amplifier 11 and delivered from an output device 12. For the value of Z, the value operated from input signals X and Y is previously stored to the memory 8.

Description

[Detailed description of the invention] The present invention relates to a multidimensional input function generator.

2. Description of the Related Art Conventionally, as a function generator that outputs an output value calculated from an input value, there has been one that calculates an output value for a single point input. In addition, it was possible to perform analog calculations for multiple inputs by using a computer or by incorporating complex electrical circuits. However, it has not been possible to manufacture devices for cases that are expressed by complex functions or that cannot be expressed as functional expressions.

The present invention solves the above-mentioned drawbacks of the conventional technology, and is capable of obtaining output values calculated or selected from two or more input values, and is capable of outputting complex functions and values that cannot be expressed by functions. The purpose is to provide an input function generator.

The present invention is a multidimensional input function generator that obtains an output value that is calculated or selected based on two or more input values. A multidimensional input function generator characterized in that an address is specified by two or more digital signals, extracts data previously input to the specified address, converts the data into an analog signal, and outputs the data. be.

Next, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.
is an input device, 3 and 4 are amplifiers, 5 and 6 are A/D converters, and 7
1 is an arithmetic unit, 8 is a memory, 9 is a buffer register, 10 is a D/A converter, 11 is an amplifier, and 12 is an output device.

Two analog inputs are input from input device 1 and input device 2, and are amplified by amplifiers 6 and 4, respectively.
/D converters 5 and 6 convert them into digital signals, respectively. The converted digital signals X and Y are calculated by the calculator 7, and the signal from the calculator 7 is used as an address designation signal for the memory 8 to designate the address of the memory 8, and the data signal 2 that has been manually entered in advance at that address is Output. The signal Z passes through the entire buffer register 9 and is sent to the D/A converter 1°, where it is converted into an analog signal, amplified by the amplifier 11, and outputted from the output device 12.

For example, when outputting the sum of two inputs, for the digital signals X and Y, a value of 2 such that z=x+y should be input in advance to the address specified by the signals X and Y. .

As shown in Table 1, the digital signal X O) value k
~XN address value, and the digital signal Y value is Y
As the address value of 1 to YH, ZX which is the intersection of these
Get the value of Y from that address.

1st Person This value of ZXY is calculated by storing input signals X and Y in an iC memory or the like in advance.

For example, when all the functions expressed by z=x+y are expressed, when X=2 and Y24, Z26, so X2 rY
It is sufficient to input 6 as the value of Z24 specified by 4. Enter values for other addresses in the same way.

Also, when outputting a function expressed as Z-X2+Y2, for input K of X=3 and Y-5, TeZ=32+52=
34, it is sufficient to store the value 34 at the intersection Z3s of X3 and Y5. For example, X-O~10, Y=0~10
If the input is in the range of
If all values of 2 for the value of are stored in memory, then z
An output expressed as -X2+Y2 can be obtained.

In addition, although values expressed by irregular curves as shown in Figure 2 are difficult to express as a function equation, multiple outputs can be obtained by storing the value Zxy of each XY intersection point in memory. It can be taken out.

FIG. 3 is an example of a circuit according to the present invention. 1 and 2 are input devices, 5 and 6 are A/D converters, 7a, 7b, and 7c are arithmetic units, 8 is a memory, 9 is a buffer register, and 10 is a D/D converter.
A converters, 11a and 11b are amplifiers, and 12 is an output device.

The analog signals inputted from the input devices 1.2 are each amplified and sent to the A/D converters 5.6. 13 and 14 are clock pulse input devices, and clock pulses are input to the A/D converter via inverters 15 and 16'e. The digital signals Da"Dy and 0: Ds~D+s/d output from the A/D converters 5 and 6 are sent to the arithmetic units 7a and 7b, respectively, and the address value MAo is
~Ass is output, the signal Ao-A+2 is input to the memory 8 as an address signal, and the signals A13 to A15 are input to the memory 8 from the chip select input terminal 8a.

Output signal Do-D from address of memory 8? The entire Fi Hanwha register 9 is inputted to the D/A converter 1o,
The signal is converted into an analog signal by the D/A converter 10, amplified by amplifiers 11a and 11b, and outputted from the output device 12.

The analog signal to be input is 4 to 20 mA, 1 to 5 V DC, etc.

In the above embodiment, there are two input devices, but three or more input devices may be provided in the same manner.

The data stored in the memory 8 may be changed depending on the type of function.

According to the present invention, the value of the requested function can be output as an electrical analog signal by inputting a plurality of analog signals.

In addition, it is possible to output values that are expressed by crude functions or values that do not hold true as a functional formula, and it is possible to output various functions by changing the input data while keeping the same configuration. It has a certain effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of a method of specifying an output value, and FIG. 3 is a circuit diagram of an embodiment of the present invention. 1.2...Input device, 6.4...Amplifier, 5,6...
・A/D converter, 7... Arithmetic unit, 8... Memory, 9...
, Ba. Far register, 10...D/A converter, 11...amplifier, 12...output device. Patent Applicant: Ebara Electric Co., Ltd. Representative Patent Attorney: Masashi Takagi Patent Attorney: Nejiro Chide Patent Attorney: Takao Maruyama

Claims (1)

[Claims] 1. In a multidimensional input function generator that obtains an output value that is calculated or selected based on two or more input values, two or more analog signals are input, and each of the analog signals is converted into a digital signal.1. A multidimensional input function generating device characterized in that an address is specified by two or more digital signals, data that has been input in advance to the specified address is extracted, the data is converted to an analog signal, and the data is output.