CN209218049U - A kind of current-to-voltage converting circuit - Google Patents
A kind of current-to-voltage converting circuit Download PDFInfo
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- CN209218049U CN209218049U CN201821638801.0U CN201821638801U CN209218049U CN 209218049 U CN209218049 U CN 209218049U CN 201821638801 U CN201821638801 U CN 201821638801U CN 209218049 U CN209218049 U CN 209218049U
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- resistance
- current
- resistor
- zener diode
- converting circuit
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Abstract
The utility model relates to a kind of current-to-voltage converting circuit, which includes fuse (F1), first resistor (R1), second resistance (R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), first capacitor (C1), the second capacitor (C2), the first zener diode (D1), the second zener diode (D2) and amplifier (A1).There are two zener diodes for setting in the reference voltage of the current-to-voltage converting circuit of the utility model, the stability for being supplied to the reference voltage of amplifier are improved, so as to improve the conversion stability of current-to-voltage converting circuit.
Description
Technical field
The utility model relates to conversion circuit technical fields, more particularly to a kind of current-to-voltage converting circuit.
Background technique
With the development of the modern industry and science and technology, test assignment and observing and controlling object become to become increasingly complex, to test
The requirement of speed and measuring accuracy is also higher and higher, so that automatic measuring and controlling system technology be pushed constantly to develop to new field.
In computer automatic measurement and control system, one that there is the electric assembling unit of certain function as system is often selected
Part, wherein the output signal of electric assembling unit is generally current signal, and general scm application system signal output
Only voltage signal, what can be handled also only has voltage signal, it is therefore desirable to carry out the conversion between Current Voltage.
But at present during electric current is converted to voltage, since the stability of reference voltage is poor, lead to Current Voltage
The conversion stability of conversion circuit is poor.
Utility model content
Therefore, to solve technological deficiency and deficiency of the existing technology, the utility model proposes a kind of Current Voltages to turn
Change circuit.
Specifically, a kind of current-to-voltage converting circuit that the utility model one embodiment proposes, comprising: fuse, the
One resistance, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, first capacitor, the second electricity
Appearance, the first zener diode, the second zener diode and amplifier, wherein
The fuse and the 3rd resistor are sequentially connected in series the positive input terminal in current input terminal and amplifier, and described
The first end of one capacitor is connected to the current input terminal and connects at the node to be formed with the fuse, the first capacitor
Second end is connected to ground terminal, and the first resistor and the second resistance concatenate the first end to be formed and be connected to the fuse
It is connected at the node to be formed with the 3rd resistor, the first resistor concatenates the second end to be formed with the second resistance and connects
In ground terminal, the first end of second capacitor is connected to the fuse and connects at the node to be formed with the 3rd resistor,
The second end of second capacitor is connected to ground terminal, and the 5th resistance and the 6th resistance are sequentially connected in series in voltage input
The negative input end at end and the amplifier, the cathode of first zener diode are connected to the 5th resistance and the described 6th
Resistance connects at the node to be formed, and the anode of first zener diode is connected to ground terminal, second zener diode
Anode be connected to the 5th resistance and connected at the node to be formed with the 6th resistance, second zener diode it is negative
Pole is connected to ground terminal, and the 7th resistance is serially connected between the 6th resistance and voltage output end, the 4th resistance string
It is connected between the output end and voltage output end of the amplifier.
In one embodiment of the utility model, the second resistance is slide rheostat.
In one embodiment of the utility model, the type of first zener diode and second zener diode
It number is MTZ2.0.
In one embodiment of the utility model, the model LM224 of the amplifier.
In one embodiment of the utility model, the fuse is self-recovery fuse.
In one embodiment of the utility model, the model WH130 of the self-recovery fuse.
The utility model embodiment has following advantage:
1. there are two zener diodes for setting in the reference voltage of the current-to-voltage converting circuit of the utility model, improve
It is supplied to the stability of the reference voltage of amplifier, so as to improve the conversion stability of current-to-voltage converting circuit.
2. the utility model improves current signal by the series connection of fixed resistance and semifixed resistor and is converted to voltage signal
Accuracy.
3. the utility model is filtered current signal by first capacitor, to remove interference, the accurate of conversion is improved
Degree and stability.
4. the current-to-voltage converting circuit of the utility model uses self-recovery fuse, when the overcurrent overheat failure of circuit obtains
To after exclusion, self-recovery fuse can recover to low resistance state automatically, and no replacement is required, easy to use, being capable of protection power source system
Safety.
Through the following detailed description with reference to the accompanying drawings, the other aspects and feature of the utility model become obvious.But it answers
When knowing, which is only the purpose design explained, not as the restriction of the scope of the utility model, this is because its
It should refer to appended claims.It should also be noted that unless otherwise noted, it is not necessary to which scale attached drawing, they are only
Try hard to conceptually illustrate structure and process described herein.
Detailed description of the invention
Below in conjunction with attached drawing, specific embodiment of the present utility model is described in detail.
Fig. 1 is a kind of current-to-voltage converting circuit structural schematic diagram provided by the embodiment of the utility model.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of utility model is described in detail.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element may be simultaneously present centering elements.On the contrary, not deposited when element is connect referred to as " direct " with another element
In intermediary element.
Referring to Figure 1, Fig. 1 is a kind of current-to-voltage converting circuit structural schematic diagram provided by the embodiment of the utility model.
The embodiments of the present invention provide a kind of current-to-voltage converting circuit, which includes fuse F1,
One resistance R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7,
One capacitor C1, the second capacitor C2, the first zener diode D1, the second zener diode D2 and amplifier A1, wherein
The fuse F1 and the 3rd resistor R3 are sequentially connected in series in the positive input of current input terminal Iin and amplifier A1
End, the first end of the first capacitor C1 are connected to the current input terminal Iin and connect the node to be formed with the fuse F1
Place, the second end of the first capacitor C1 are connected to ground terminal GND, the first resistor R1 and the second resistance R2 concatenation shape
At first end be connected to the fuse F1 and connected at the node to be formed with the 3rd resistor R3, the first resistor R1 and
The second resistance R2 concatenates the second end to be formed and is connected to ground terminal GND, and the first end of the second capacitor C2 is connected to institute
It states fuse F1 to connect at the node to be formed with the 3rd resistor R3, the second end of the second capacitor C2 is connected to ground terminal
GND, the 5th resistance R5 and the 6th resistance R6 are sequentially connected in series defeated in bearing for the voltage input end Vin and amplifier A1
Enter end, the cathode of the first zener diode D1 is connected to the 5th resistance R5 and connects to be formed with the 6th resistance R6
At node, the anode of the first zener diode D1 is connected to ground terminal GND, and the anode of the second zener diode D2 is even
It is connected to the 5th resistance R5 to connect at the node to be formed with the 6th resistance R6, the cathode of the second zener diode D2
It is connected to ground terminal GND, the 7th resistance R7 is serially connected between the 6th resistance R6 and voltage output end Vout, and described
Four resistance R4 are serially connected between the output end and voltage output end Vout of the amplifier A1.
Current signal is filtered by first capacitor, to remove interference, guarantees the stabilization of current signal transmission, improves
The accuracy and stability of conversion.
Specifically, fuse F1 is self-recovery fuse, and the model WH130 of self-recovery fuse.
Using self-recovery fuse, current-to-voltage converting circuit not only can protect, and when current-to-voltage converting circuit
After overcurrent overheat failure obtains exclusion, self-recovery fuse can recover to low resistance state automatically, and no replacement is required, easy to use, and
It is capable of the safety of protection power source system.
Specifically, first resistor R1 is the resistance of fixed resistance value, and second resistance R2 is slide rheostat, and second resistance R2
For semifixed resistor, it is finely adjusted using second resistance R2.
The accuracy that current signal is converted to voltage signal is improved by the series connection of first resistor R1 and second resistance R2.
Specifically, the reference voltage of the present embodiment is connected to the negative input end of amplifier A1, and current-to-voltage converting circuit
Reference voltage in setting there are two zener diode, respectively the first zener diode D1 and the second zener diode D2, mention
The stability of the high reference voltage for being supplied to amplifier, so as to improve the conversion stability of current-to-voltage converting circuit.
Preferably, the model of the first zener diode D1 and the second zener diode D2 are MTZ2.0.
Preferably, the model LM224 of amplifier A1.
For example, when needing the current signal converted into 4-20mA, first resistor R1 can be set to 200 Ω, second
Resistance R2 is set as 0-10 Ω, and 3rd resistor R3 is set as 100 Ω, and the voltage of voltage input end Vin input is 5V, the 4th resistance
R4 is 200 Ω, and the 5th resistance R5 is set as 1k Ω, and the 6th resistance R6 is set as 2k Ω, the 7th resistance R7 is set as 1k Ω, then turns
The voltage signal changed can be 0-5V.
The working principle of the Current Voltage circuit is as follows: by current signal after filtering, being converted using amplifier A1
For voltage signal, then exported by the output end of amplifier A1.In the mistake amplified using amplifier A1 to voltage signal
Cheng Zhong needs to provide on the negative input end of amplifier A1 a reference voltage.It is steady that first zener diode D1 and second is set
It presses diode D2 to be used for burning voltage, avoids reference voltage fluctuating range excessive, so that the Current Voltage of the utility model is converted
For circuit not vulnerable to external interference, the voltage after conversion is accurate.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (6)
1. a kind of current-to-voltage converting circuit characterized by comprising fuse (F1), first resistor (R1), second resistance
(R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the first electricity
Hold (C1), the second capacitor (C2), the first zener diode (D1), the second zener diode (D2) and amplifier (A1), wherein
The fuse (F1) and the 3rd resistor (R3) are sequentially connected in series in current input terminal (Iin) and amplifier (A1) just
Input terminal, the first end of the first capacitor (C1) are connected to the current input terminal (Iin) and the fuse (F1) connection
At the node of formation, the second end of the first capacitor (C1) is connected to ground terminal (GND), the first resistor (R1) and described
The first end that second resistance (R2) concatenation is formed is connected to the fuse (F1) and the 3rd resistor (R3) connects formation
At node, the second end of the first resistor (R1) and the second resistance (R2) concatenation formation is connected to ground terminal (GND), institute
At the node that the first end for stating the second capacitor (C2) is connected to the fuse (F1) and the 3rd resistor (R3) connection is formed,
The second end of second capacitor (C2) is connected to ground terminal (GND), the 5th resistance (R5) and the 6th resistance (R6)
It is sequentially connected in series in the negative input end of voltage input end (Vin) and the amplifier (A1), first zener diode (D1)
At the node that cathode is connected to the 5th resistance (R5) and the 6th resistance (R6) connection is formed, two pole of the first pressure stabilizing
The anode of pipe (D1) is connected to ground terminal (GND), and the anode of second zener diode (D2) is connected to the 5th resistance
(R5) and at the node of the 6th resistance (R6) connection formation, the cathode of second zener diode (D2) is connected to ground connection
It holds (GND), the 7th resistance (R7) is serially connected between the 6th resistance (R6) and voltage output end (Vout), and the described 4th
Resistance (R4) is serially connected between the output end of the amplifier (A1) and voltage output end (Vout).
2. current-to-voltage converting circuit according to claim 1, which is characterized in that the second resistance (R2) is that sliding becomes
Hinder device.
3. current-to-voltage converting circuit according to claim 1, which is characterized in that first zener diode (D1) and
The model of second zener diode (D2) is MTZ2.0.
4. current-to-voltage converting circuit according to claim 1, which is characterized in that the model of the amplifier (A1)
LM224。
5. current-to-voltage converting circuit according to claim 1, which is characterized in that the fuse (F1) is self- recoverage guarantor
Dangerous silk.
6. current-to-voltage converting circuit according to claim 5, which is characterized in that the model of the self-recovery fuse
WH130。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821638801.0U CN209218049U (en) | 2018-10-09 | 2018-10-09 | A kind of current-to-voltage converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821638801.0U CN209218049U (en) | 2018-10-09 | 2018-10-09 | A kind of current-to-voltage converting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209218049U true CN209218049U (en) | 2019-08-06 |
Family
ID=67455517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821638801.0U Expired - Fee Related CN209218049U (en) | 2018-10-09 | 2018-10-09 | A kind of current-to-voltage converting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209218049U (en) |
-
2018
- 2018-10-09 CN CN201821638801.0U patent/CN209218049U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190806 Termination date: 20211009 |