CN204667242U - A kind of analog input circuit - Google Patents
A kind of analog input circuit Download PDFInfo
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- CN204667242U CN204667242U CN201520406977.3U CN201520406977U CN204667242U CN 204667242 U CN204667242 U CN 204667242U CN 201520406977 U CN201520406977 U CN 201520406977U CN 204667242 U CN204667242 U CN 204667242U
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- input circuit
- analog input
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Abstract
The utility model provides a kind of analog input circuit, belongs to electronic technology field.It solve existing analog input circuit complex structure, the problem of spread of voltage.This analog input circuit comprises the first operational amplifier U1, the second operational amplifier U2, reference power source U3, and resistance R1 to resistance R11, electric capacity C1 are to electric capacity C5.This analog input circuit has that structure is simple, reasonable in design, the advantage of output voltage stabilization.
Description
Technical field
The utility model belongs to electronic technology field, relates to a kind of analog input circuit.
Background technology
Various electronic equipments now all need suitable input voltage to maintain the normal operation of equipment, so the circuit being often provided with analog input in electronic equipment normally runs to make equipment.
In sum, for solving the deficiency that in existing electronic equipment, input circuit is too complicated, need to design a kind of structure analog input circuit simple, reasonable in design.
Summary of the invention
The purpose of this utility model there are the problems referred to above for existing technology, proposes the analog input circuit that a kind of structure is simple, reasonable in design, stable.
The purpose of this utility model realizes by following technical proposal: a kind of analog input circuit, and comprise the first operational amplifier U1, the second operational amplifier U2, reference power source U3, resistance R1 to resistance R11, electric capacity C1 are to electric capacity C5; The in-phase input end of described first operational amplifier U1 accesses the output terminal of the first operational amplifier U1 through resistance R5, the in-phase input end of the first operational amplifier U1 connects the inverting input of the first operational amplifier U1 through resistance R3, electric capacity C3 and resistance R4, inverting input ground connection after resistance R11 of the first operational amplifier U1; Resistance R3 is ground connection after electric capacity C4, and resistance R3 is also connected with resistance R1, and resistance R1 is connected with input end; Described resistance R1 is ground connection after electric capacity C1, electric capacity C2, and electric capacity C2 is connected with resistance R4 through resistance R2; The output terminal of described first operational amplifier U1 connects the first operational amplifier U1 in-phase input end through resistance R5, the output terminal of the first operational amplifier U1 connects the in-phase input end of the second operational amplifier U2 through resistance R6, the in-phase input end of the second operational amplifier U2 connects reference power source U3 through resistance R7; The output terminal of described second operational amplifier U2 connects the inverting input of the second operational amplifier U2 after resistance R9, inverting input ground connection after resistance R10 of the second operational amplifier, and resistance R9 two ends are parallel with electric capacity C6; The output terminal of the second operational amplifier U2 connects output terminal after resistance R8, and resistance R8 is also connected with electric capacity C5, electric capacity C5 ground connection.
Further, the value of described resistance R1 to resistance R4 and resistance R6, resistance R10 is all 10 kilohms, and the value of resistance R5, resistance R11 is all 20 kilohms, and the value of resistance R7, R9 is all 1.5 kilohms; The value of described electric capacity C3, electric capacity C5 and electric capacity C6 is all 0.1 microfarad, and the value of electric capacity C4 is 0.01 microfarad.
In above-mentioned a kind of analog input circuit, described circuit structure is simple, reasonable in design, output voltage stabilization, and compared with prior art, the utility model output voltage is more stable, and structure is more simple, and manufacturing cost is lower.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of mimic channel figure.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, this mimic channel figure comprises the first operational amplifier U1, the second operational amplifier U2, reference power source U3, and resistance R1 to resistance R11, electric capacity C1 are to electric capacity C5; The in-phase input end of described first operational amplifier U1 accesses the output terminal of the first operational amplifier U1 through resistance R5, the in-phase input end of the first operational amplifier U1 connects the inverting input of the first operational amplifier U1 through resistance R3, electric capacity C3 and resistance R4, inverting input ground connection after resistance R11 of the first operational amplifier U1; Resistance R3 is ground connection after electric capacity C4, and resistance R3 is also connected with resistance R1, and resistance R1 is connected with input end; Described resistance R1 is ground connection after electric capacity C1, electric capacity C2, and electric capacity C2 is connected with resistance R4 through resistance R2; The output terminal of described first operational amplifier U1 connects the first operational amplifier U1 in-phase input end through resistance R5, the output terminal of the first operational amplifier U1 connects the in-phase input end of the second operational amplifier U2 through resistance R6, the in-phase input end of the second operational amplifier U2 connects reference power source U3 through resistance R7; The output terminal of described second operational amplifier U2 connects the inverting input of the second operational amplifier U2 after resistance R9, inverting input ground connection after resistance R10 of the second operational amplifier, and resistance R9 two ends are parallel with electric capacity C6; The output terminal of the second operational amplifier U2 connects output terminal after resistance R8, and resistance R8 is also connected with electric capacity C5, electric capacity C5 ground connection.
When input end has voltage to input, the voltage compare held with reference voltage U3 after the first operational amplifier U1 adjusts.When input voltage is less than reference voltage, the voltage be applicable to can be obtained after the second operational amplifier U2 amplifies; When input voltage is larger than reference voltage, suitable voltage can be obtained after the second operational amplifier adjustment.
The value of described resistance R1 to resistance R4 and resistance R6, resistance R10 is all 10 kilohms, and the value of resistance R5, resistance R11 is all 20 kilohms, and the value of resistance R7, R9 is all 1.5 kilohms; The value of described electric capacity C3, electric capacity C5 and electric capacity C6 is all 0.1 microfarad, and the value of electric capacity C4 is 0.01 microfarad.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (2)
1. an analog input circuit, is characterized in that, described analog input circuit comprises the first operational amplifier U1, the second operational amplifier U2, reference power source U3, and resistance R1 to resistance R11, electric capacity C1 are to electric capacity C6; The in-phase input end of described first operational amplifier U1 accesses the output terminal of the first operational amplifier U1 through resistance R5, the in-phase input end of the first operational amplifier U1 connects the inverting input of the first operational amplifier U1 through resistance R3, electric capacity C3 and resistance R4, inverting input ground connection after resistance R11 of the first operational amplifier U1; Resistance R3 is ground connection after electric capacity C4, and resistance R3 is also connected with resistance R1, and resistance R1 is connected with input end; Described resistance R1 is ground connection after electric capacity C1, electric capacity C2, and electric capacity C2 is connected with resistance R4 through resistance R2; The output terminal of described first operational amplifier U1 connects the first operational amplifier U1 in-phase input end through resistance R5, the output terminal of the first operational amplifier U1 connects the in-phase input end of the second operational amplifier U2 through resistance R6, the in-phase input end of the second operational amplifier U2 connects reference power source U3 through resistance R7; The output terminal of described second operational amplifier U2 connects the inverting input of the second operational amplifier U2 after resistance R9, inverting input ground connection after resistance R10 of the second operational amplifier, and resistance R9 two ends are parallel with electric capacity C6; The output terminal of the second operational amplifier U2 connects output terminal after resistance R8, and resistance R8 is also connected with electric capacity C5, electric capacity C5 ground connection.
2. a kind of analog input circuit according to claim 1, it is characterized in that, the value of described resistance R1 to resistance R4 and resistance R6, resistance R10 is all 10 kilohms, and the value of resistance R5, resistance R11 is all 20 kilohms, and the value of resistance R7, R9 is all 1.5 kilohms; The value of described electric capacity C3, electric capacity C5 and electric capacity C6 is all 0.1 microfarad, and the value of electric capacity C4 is 0.01 microfarad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520406977.3U CN204667242U (en) | 2015-06-12 | 2015-06-12 | A kind of analog input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520406977.3U CN204667242U (en) | 2015-06-12 | 2015-06-12 | A kind of analog input circuit |
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| Publication Number | Publication Date |
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| CN204667242U true CN204667242U (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520406977.3U Active CN204667242U (en) | 2015-06-12 | 2015-06-12 | A kind of analog input circuit |
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| CN (1) | CN204667242U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404891A (en) * | 2023-04-24 | 2023-07-07 | 成都吉瓦特科技有限公司 | Output voltage-stabilizing and current-limiting loop control circuit of linear direct-current stabilized power supply |
-
2015
- 2015-06-12 CN CN201520406977.3U patent/CN204667242U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404891A (en) * | 2023-04-24 | 2023-07-07 | 成都吉瓦特科技有限公司 | Output voltage-stabilizing and current-limiting loop control circuit of linear direct-current stabilized power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 315111 five Town Industrial Zone, Ningbo, Zhejiang, Yinzhou District Patentee after: Ningbo Xingtai Technology Co., Ltd. Address before: 315111 Zhejiang city of Ningbo province Yinzhou District Wuxiang Industrial Park Xin Shui Road No. 6 Patentee before: Ningbo Xingtai Machinery Co., Ltd. |