CN219536043U - Voltage comparison control circuit, circuit board and electronic equipment - Google Patents
Voltage comparison control circuit, circuit board and electronic equipment Download PDFInfo
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- CN219536043U CN219536043U CN202320545619.5U CN202320545619U CN219536043U CN 219536043 U CN219536043 U CN 219536043U CN 202320545619 U CN202320545619 U CN 202320545619U CN 219536043 U CN219536043 U CN 219536043U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The utility model discloses a voltage comparison control circuit, a circuit board and electronic equipment, and relates to the technical field of voltage comparison. The voltage comparison control circuit comprises a comparison sub-circuit and a control sub-circuit, the comparison sub-circuit comprises a first transistor, a first resistor and a second resistor, one end of the first resistor is used for being connected with a power supply voltage, the other end of the first resistor is grounded through the second resistor, the base electrode of the first transistor is connected with an input voltage, and the emitter electrode of the first transistor is connected between the first resistor and the second resistor; the control sub-circuit is connected with the collector electrode of the first transistor, and controls the output level of the output end of the control sub-circuit according to the conducting state of the first transistor, wherein the output level represents the relation between the input voltage and the reference voltage, and the reference voltage is determined by the power supply voltage, the first resistor, the second resistor and the conducting voltage of the first transistor. The utility model can reduce the error of the reference voltage, thereby improving the accuracy of the voltage comparison control circuit.
Description
Technical Field
The present utility model relates to the field of voltage comparison technologies, and in particular, to a voltage comparison control circuit, a circuit board, and an electronic device.
Background
The voltage comparison circuit is a common circuit in electronic equipment, and the voltage comparison circuit generally divides the power supply voltage through a voltage dividing resistor, determines the reference voltage by combining the on voltage of the transistor, and can control the on or off of the transistor according to the relation between the input voltage and the reference voltage, so that the comparison between the input voltage and the reference voltage is realized.
In the related art, when an error occurs in the turn-on voltage of the transistor, the voltage dividing resistor amplifies the error in equal proportion, resulting in a larger error of the reference voltage, and thus, a lower accuracy of the voltage comparing circuit in the related art.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a voltage comparison control circuit, a circuit board and electronic equipment, which can reduce the error of a reference voltage, thereby improving the accuracy of the voltage comparison control circuit.
In a first aspect, an embodiment of the present utility model provides a voltage comparison control circuit, including:
the comparison sub-circuit comprises a first transistor, a first resistor and a second resistor, wherein one end of the first resistor is used for being connected with a power supply voltage, the other end of the first resistor is grounded through the second resistor, the base electrode of the first transistor is used for being connected with an input voltage, and the emitter electrode of the first transistor is connected between the first resistor and the second resistor;
the control sub-circuit is connected with the collector electrode of the first transistor and is used for controlling the output level of the output end of the control sub-circuit according to the conducting state of the first transistor, and the output level is used for representing the relation between the input voltage and the reference voltage, wherein the reference voltage is determined according to the power supply voltage, the first resistor, the second resistor and the first transistor.
The voltage comparison control circuit according to the embodiment of the first aspect of the utility model has at least the following advantages: the voltage comparison control circuit comprises a comparison sub-circuit and a control sub-circuit, the comparison sub-circuit comprises a first transistor, a first resistor and a second resistor, one end of the first resistor is used for being connected with a power supply voltage, the other end of the first resistor is grounded through the second resistor, the base electrode of the first transistor is used for being connected with an input voltage, and the emitter electrode of the first transistor is connected between the first resistor and the second resistor; the control sub-circuit is connected with the collector electrode of the first transistor, and is used for controlling the output level of the output end of the control sub-circuit according to the conduction state of the first transistor, wherein the output level is used for representing the relation between the input voltage and the reference voltage, and the reference voltage is determined according to the power supply voltage, the first resistor, the second resistor and the first transistor. . In the comparison sub-circuit provided by the embodiment of the utility model, the reference voltage is determined by the power supply voltage, the first resistor, the second resistor and the conducting voltage of the first transistor, and the emitter of the first transistor is connected between the first resistor and the second resistor, so that the first resistor and the second resistor cannot amplify the error of the conducting voltage of the first transistor in equal proportion, the error of the reference voltage can be reduced, and the accuracy of the voltage comparison control circuit is further improved.
According to some embodiments of the first aspect of the present utility model, the first transistor is an NPN transistor;
the control sub-circuit comprises a second transistor, a third resistor and a fourth resistor, wherein the second transistor is a PNP triode, the base electrode of the second transistor is connected with the collector electrode of the first transistor, the base electrode of the second transistor is also connected with the power supply voltage through the third resistor, the emitter electrode of the second transistor is connected with the power supply voltage, the collector electrode of the second transistor is grounded through the fourth resistor, and the collector electrode of the second transistor is used as the output end of the control sub-circuit.
According to some embodiments of the first aspect of the utility model, the control sub-circuit further comprises a capacitor, one end of the capacitor is connected to the collector of the second transistor, and the other end of the capacitor is grounded.
According to some embodiments of the first aspect of the utility model, the control sub-circuit further comprises a diode, an input terminal of the diode being grounded, an output terminal of the diode being connected to a collector of the second transistor.
According to some embodiments of the first aspect of the present utility model, the first transistor is a PNP transistor;
the control sub-circuit comprises a third transistor, a fifth resistor and a sixth resistor, wherein the third transistor is an NPN triode, the base electrode of the third transistor is connected with the collector electrode of the first transistor, the base electrode of the third transistor is grounded through the fifth resistor, the emitter electrode of the third transistor is grounded, the collector electrode of the third transistor is connected with the power supply voltage through the sixth resistor, and the collector electrode of the third transistor is used as the output end of the control sub-circuit.
According to some embodiments of the first aspect of the utility model, the first transistor is connected to the input voltage through a seventh resistor.
According to some embodiments of the first aspect of the present utility model, the voltage value of the power supply voltage is 5V, the resistance value of the first resistor is 100kΩ, the resistance value of the second resistor is 30kΩ, the resistance value of the third resistor is 100kΩ, and the resistance value of the fourth resistor is 30kΩ.
According to some embodiments of the first aspect of the present utility model, the voltage value of the power supply voltage is 5V, the resistance value of the first resistor is 30kΩ, the resistance value of the second resistor is 100kΩ, the resistance value of the fifth resistor is 100kΩ, and the resistance value of the sixth resistor is 30kΩ.
In a second aspect, an embodiment of the present utility model provides a circuit board, including a voltage comparison control circuit according to any one of the embodiments of the first aspect.
In a third aspect, an embodiment of the present utility model provides an electronic device, including the circuit board according to the embodiment of the second aspect.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a voltage comparison control circuit according to some embodiments of the present utility model;
fig. 2 is a voltage comparison control circuit according to another embodiment of the utility model.
Reference numerals:
a first transistor Q1; a first resistor R1 and a second resistor R2; a third resistor R3; a fourth resistor R4; a fifth resistor R5; a sixth resistor R6; a seventh resistor R7; a capacitor C1; a diode D1; a second transistor Q2; and a third transistor Q3.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the description of the present utility model, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiment of the first aspect of the utility model provides a voltage comparison control circuit, which comprises a comparison sub-circuit and a control sub-circuit, wherein the comparison sub-circuit comprises a first transistor Q1, a first resistor R1 and a second resistor R2, one end of the first resistor R1 is used for accessing a power supply voltage, the other end of the first resistor R1 is grounded through the second resistor R2, a base electrode of the first transistor Q1 is used for accessing an input voltage, and an emitter electrode of the first transistor Q1 is connected between the first resistor R1 and the second resistor R2; the control sub-circuit is connected with the collector electrode of the first transistor Q1, and is used for controlling the output level of the output end of the control sub-circuit according to the conducting state of the first transistor Q1, wherein the output level is used for representing the relation between the input voltage and the reference voltage, and the reference voltage is determined according to the power supply voltage, the first resistor, the second resistor and the first transistor. In the comparison sub-circuit of the embodiment of the utility model, the reference voltage is determined according to the conducting voltage, the power supply voltage, the first resistor R1 and the second resistor R2 of the first transistor Q1, and because the emitter of the first transistor Q1 is connected between the first resistor R1 and the second resistor R2, the first resistor R1 and the second resistor R2 cannot amplify the error of the conducting voltage of the first transistor Q1 in equal proportion, so that the error of the reference voltage can be reduced, and the accuracy of the voltage comparison control circuit is further improved.
Referring to fig. 1, fig. 1 is a voltage comparison control circuit according to some embodiments of the present utility model. In fig. 1, the first transistor Q1 is an NPN transistor, the power supply voltage is V1, and the voltage value is 5V, and the calculation formula of the reference voltage is:
wherein V is REF As reference voltage, V BE Is the on voltage of the first transistor Q1, V at normal temperature BE Is 0.6V. Due to V BE The value of (2) is easily affected by factors such as temperature, and thus is usually V BE With errors from V REF The calculation formula of (1) can be derived, at V BE In the presence of errors, V REF Is equal to V BE The first resistor R1 and the second resistor R2 do not scale up V BE Therefore, the error of the reference voltage can be reduced, thereby improving the accuracy of the voltage comparison control circuit. In fig. 1, when the input voltage is less than the reference voltage, the first transistor Q1 is turned off; when the input voltage is greater than or equal to the reference voltage, the first transistor Q1 is turned on. The control sub-circuit is capable of controlling an output level of an output terminal of the control sub-circuit according to an on state of the first transistor Q1.
Referring to fig. 2, fig. 2 is a voltage comparison control circuit according to other embodiments of the present utility model. In fig. 2, the first transistor Q1 is a PNP transistor, the supply voltage is V1, and the voltage value is 5V, and then the calculation formula of the reference voltage is:
wherein V is REF As reference voltage, V BE Is the on voltage of the first transistor Q1, V at normal temperature BE Is 0.6V. From V REF The calculation formula of (1) can be derived, at V BE In the presence of errors, V REF Is equal to V BE The first resistor R1 and the second resistor R2 do not scale up V BE Therefore, the error of the reference voltage can be reduced, thereby improving the accuracy of the voltage comparison control circuit. When the input voltage is greater than or equal to the reference voltage, the first transistor Q1 is turned off; when the input voltage is less than the reference voltage, the first transistor Q1 is turned on. The control sub-circuit is capable of controlling an output level of an output terminal of the control sub-circuit according to an on state of the first transistor Q1.
It will be appreciated that, referring to fig. 1, when the first transistor Q1 is an NPN transistor, the control sub-circuit includes a second transistor Q2, a third resistor R3, and a fourth resistor R4, the second transistor Q2 is a PNP transistor, a base of the second transistor Q2 is connected to a collector of the first transistor Q1, a base of the second transistor Q2 is further connected to a supply voltage through the third resistor R3, an emitter of the second transistor Q2 is connected to the supply voltage, a collector of the second transistor Q2 is grounded through the fourth resistor R4, and a collector of the second transistor Q2 serves as an output terminal of the control sub-circuit. Specifically, in fig. 1, when the input voltage is smaller than the reference voltage, the first transistor Q1 is turned off, and at this time, the base of the second transistor Q2 is pulled up by the third resistor R3, so that the second transistor Q2 is turned off, and therefore, the collector of the second transistor Q2 is pulled down to be at a low level by the fourth resistor R4, and therefore, the collector of the second transistor Q2 is at a low level, that is, the output level of the output terminal of the control sub-circuit is at a low level. When the input voltage is greater than or equal to the reference voltage, the first transistor Q1 is turned on, and at this time, the base of the second transistor Q2 is at a low level, so that the second transistor Q2 is turned on, and therefore, the collector of the second transistor Q2 is at a high level, that is, the output level of the output terminal of the control sub-circuit is at a high level. Thus, when the first transistor Q1 is turned off, the output level of the output terminal of the control sub-circuit is low; when the first transistor Q1 is turned on, the output level of the output terminal of the control sub-circuit is high.
It will be appreciated that in some embodiments, referring to fig. 1, the control sub-circuit further includes a capacitor C1, one end of the capacitor C1 is connected to the collector of the second transistor Q2, and the other end of the capacitor C1 is grounded. The capacitor C1 can play a role in filtering, so that the circuit is more stable.
It will be appreciated that in some embodiments, referring to fig. 1, the control sub-circuit further comprises a diode D1, the input of the diode D1 being grounded, the output of the diode D1 being connected to the collector of the second transistor Q2. The diode D1 can play a role in stabilizing voltage, so that the circuit is more stable.
It will be appreciated that, referring to fig. 2, when the first transistor Q1 is a PNP type triode, the control sub-circuit includes a third transistor Q3, a fifth resistor R5 and a sixth resistor R6, the third transistor Q3 is an NPN type triode, a base of the third transistor Q3 is connected to a collector of the first transistor Q1, the base of the third transistor Q3 is further grounded through the fifth resistor R5, an emitter of the third transistor Q3 is grounded, a collector of the third transistor Q3 is connected to a supply voltage through the sixth resistor R6, and a collector of the third transistor Q3 serves as an output terminal of the control sub-circuit. Specifically, in fig. 2, when the input voltage is greater than or equal to the reference voltage, the first transistor Q1 is turned off, and at this time, the base of the third transistor Q3 is at a low level, and the third transistor Q3 is turned off, and then the collector of the third transistor Q3 is pulled up to a high level by the sixth resistor R6, that is, the output level of the output terminal of the control sub-circuit is at a high level. When the input voltage is smaller than the reference voltage, the first transistor Q1 is turned on, the base of the third transistor Q3 is at a high level, the third transistor Q3 is turned on, and the collector of the third transistor Q3 is pulled to ground, i.e., the output level of the output terminal of the control sub-circuit is at a low level. Thus, when the first transistor Q1 is turned off, the output level of the output terminal of the control sub-circuit is high; when the first transistor Q1 is turned on, the output level of the output terminal of the control sub-circuit is low.
As can be appreciated, referring to fig. 1 and 2, the first transistor Q1 is connected to the input voltage through the seventh resistor R7, and the current flowing into the base of the first transistor Q1 can be regulated through the seventh resistor R7.
It will be understood that, referring to fig. 1, the voltage value of the power supply voltage is 5V, the resistance value of the first resistor R1 is 100kΩ, the resistance value of the second resistor R2 is 30kΩ, the resistance value of the third resistor R3 is 100kΩ, and the resistance value of the fourth resistor R4 is 30kΩ.
It will be understood that, referring to fig. 2, the voltage value of the power supply voltage is 5V, the resistance value of the first resistor R1 is 30kΩ, the resistance value of the second resistor R2 is 100kΩ, the resistance value of the fifth resistor R5 is 100kΩ, and the resistance value of the sixth resistor R6 is 30kΩ.
It should be noted that, the resistance values of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 are set according to actual needs by those skilled in the art; the capacity of the capacitor C1 can be set according to actual needs by a person skilled in the art; a person skilled in the art can select specific types of the first transistor Q1, the second transistor Q2 and the third transistor Q3 according to actual needs; the voltage value of the supply voltage can be set by a person skilled in the art according to the actual requirements.
In a second aspect, an embodiment of the present utility model provides a circuit board, including a voltage comparison control circuit as in any one of the embodiments of the first aspect.
Since the wiring board includes the voltage comparison control circuit according to any one of the embodiments of the first aspect of the present utility model, the corresponding contents of the voltage comparison control circuit in the embodiments mentioned in the first aspect are equally applicable to the wiring board in the embodiments mentioned in the second aspect, and have the same implementation principles and technical effects, and are not described in detail herein to avoid redundancy of description.
In a third aspect, an embodiment of the present utility model provides an electronic device, including a circuit board as in the embodiment of the second aspect.
Since the electronic device includes the wiring board of the embodiment of the second aspect, and the wiring board includes the voltage comparison control circuit according to any one of the embodiments of the first aspect of the present utility model, the corresponding contents of the voltage comparison control circuit in the embodiment mentioned in the first aspect are equally applicable to the electronic device in the embodiment mentioned in the third aspect, and have the same implementation principles and technical effects, and are not described in detail herein to avoid redundancy of description.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model. Furthermore, embodiments of the utility model and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A voltage comparison control circuit, comprising:
the comparison sub-circuit comprises a first transistor, a first resistor and a second resistor, wherein one end of the first resistor is used for being connected with a power supply voltage, the other end of the first resistor is grounded through the second resistor, the base electrode of the first transistor is used for being connected with an input voltage, and the emitter electrode of the first transistor is connected between the first resistor and the second resistor;
the control sub-circuit is connected with the collector electrode of the first transistor and is used for controlling the output level of the output end of the control sub-circuit according to the conducting state of the first transistor, and the output level is used for representing the relation between the input voltage and the reference voltage, wherein the reference voltage is determined according to the power supply voltage, the first resistor, the second resistor and the first transistor.
2. The voltage comparison control circuit of claim 1, wherein the first transistor is an NPN transistor;
the control sub-circuit comprises a second transistor, a third resistor and a fourth resistor, wherein the second transistor is a PNP triode, the base electrode of the second transistor is connected with the collector electrode of the first transistor, the base electrode of the second transistor is also connected with the power supply voltage through the third resistor, the emitter electrode of the second transistor is connected with the power supply voltage, the collector electrode of the second transistor is grounded through the fourth resistor, and the collector electrode of the second transistor is used as the output end of the control sub-circuit.
3. The voltage comparison control circuit of claim 2, wherein the control sub-circuit further comprises a capacitor, one end of the capacitor is connected to the collector of the second transistor, and the other end of the capacitor is grounded.
4. The voltage comparison control circuit of claim 2, wherein the control sub-circuit further comprises a diode, an input of the diode being grounded, an output of the diode being connected to a collector of the second transistor.
5. The voltage comparison control circuit of claim 1, wherein the first transistor is a PNP transistor;
the control sub-circuit comprises a third transistor, a fifth resistor and a sixth resistor, wherein the third transistor is an NPN triode, the base electrode of the third transistor is connected with the collector electrode of the first transistor, the base electrode of the third transistor is grounded through the fifth resistor, the emitter electrode of the third transistor is grounded, the collector electrode of the third transistor is connected with the power supply voltage through the sixth resistor, and the collector electrode of the third transistor is used as the output end of the control sub-circuit.
6. The voltage comparison control circuit of claim 1, wherein the first transistor is coupled to the input voltage through a seventh resistor.
7. The voltage comparison control circuit according to claim 2, wherein the voltage value of the power supply voltage is 5V, the resistance value of the first resistor is 100kΩ, the resistance value of the second resistor is 30kΩ, the resistance value of the third resistor is 100kΩ, and the resistance value of the fourth resistor is 30kΩ.
8. The voltage comparison control circuit according to claim 5, wherein the voltage value of the power supply voltage is 5V, the resistance value of the first resistor is 30kΩ, the resistance value of the second resistor is 100kΩ, the resistance value of the fifth resistor is 100kΩ, and the resistance value of the sixth resistor is 30kΩ.
9. A wiring board comprising the voltage comparison control circuit according to any one of claims 1 to 8.
10. An electronic device comprising the wiring board of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320545619.5U CN219536043U (en) | 2023-03-10 | 2023-03-10 | Voltage comparison control circuit, circuit board and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320545619.5U CN219536043U (en) | 2023-03-10 | 2023-03-10 | Voltage comparison control circuit, circuit board and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN219536043U true CN219536043U (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320545619.5U Active CN219536043U (en) | 2023-03-10 | 2023-03-10 | Voltage comparison control circuit, circuit board and electronic equipment |
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| Country | Link |
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| CN (1) | CN219536043U (en) |
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- 2023-03-10 CN CN202320545619.5U patent/CN219536043U/en active Active
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Address after: 518000 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518000 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |
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