CN210109276U - Button cell electric quantity is low detection circuitry - Google Patents
Button cell electric quantity is low detection circuitry Download PDFInfo
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- CN210109276U CN210109276U CN201920528145.7U CN201920528145U CN210109276U CN 210109276 U CN210109276 U CN 210109276U CN 201920528145 U CN201920528145 U CN 201920528145U CN 210109276 U CN210109276 U CN 210109276U
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Abstract
The utility model discloses a button cell electric quantity low detection circuit, which comprises a signal generating circuit and a signal output circuit, wherein the signal generating circuit is used for detecting the voltage of a button cell and outputting a first level signal when the voltage is lower than a set value; the signal output circuit is connected with the output end of the signal generating circuit and used for generating a second level signal according to the first level signal. The button cell electric quantity low detection circuit can know the button cell electric quantity low state of the communication equipment by detecting the low level voltage. And an alarm signal is output to the external electronic equipment, and at the moment, the external electronic equipment can carry out preset operation, so that the abnormal problem is avoided.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a button cell electric quantity detection circuitry on the low side.
Background
In daily use, the button cell is often used by electronic equipment, the situation that the electric quantity is low can be avoided after the button cell is used for a long time, certain functions of the equipment cannot be realized, and the circuit system can be used for receiving signals, so that corresponding measures are taken, and the harm is reduced to the minimum.
In the prior art, whether the chip is fully utilized or not needs to be considered when the chip is used, for example, whether the multi-pin is multifunctional or not and whether the function utilization rate is high or not, voltage input requirements and chip cost problems required by the chip and the like.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide a button cell power level detection circuit.
In order to achieve the above object, according to the utility model discloses button cell electric quantity is detection circuitry on the low side, include:
the signal generating circuit is used for detecting the voltage of the button battery and outputting a first level signal when the voltage is lower than a set value;
and the signal output circuit is connected with the output end of the signal generation circuit and is used for generating a second level signal according to the first level signal.
Further, according to an embodiment of the present invention, when the first level signal is a low level signal, the second level signal is also a low level signal.
Further, according to the utility model discloses an embodiment, signal generation circuit includes first current-limiting resistor, filter capacitor and the chip that resets, first current-limiting resistor's one end with button cell's output is connected, first current-limiting resistor's the other end with the power supply end that resets the chip is connected, filter capacitor's one end and the power end that resets the chip are connected, filter capacitor's the other end and reference ground are connected.
Further, according to the utility model discloses an embodiment, signal output circuit includes pull-up resistance, second current limiting resistance one end is connected with the reset signal output part that resets the chip, and the reset signal is exported to the second current limiting resistance other end, the reset signal output part that resets the chip is connected to pull-up resistance one end, the power end is connected to the pull-up resistance other end.
The embodiment of the utility model provides a button cell electric quantity is low detection circuitry is through working as when signal generation circuit detects button cell output voltage value and is less than the setting value, exports low level voltage, low level voltage effect with signal output circuit's input, signal output circuit is in low level voltage exports low level voltage under low level voltage's the effect. The external electronic equipment can learn the low state of the button battery of the communication equipment by detecting the low level voltage. And an alarm signal is output to the external electronic equipment, and at the moment, the external electronic equipment can carry out preset operation, so that the abnormal problem is avoided.
Drawings
Fig. 1 is the embodiment of the utility model provides a button cell electric quantity is low detection circuitry's schematic structure diagram.
Reference numerals:
a button cell electric quantity low detection circuit 10;
a signal generation circuit 101;
a signal output circuit 102.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, the utility model provides a button cell electric quantity is detection circuitry on a low side, include: the button cell voltage detection circuit comprises a signal generating circuit 101 and a signal output circuit 102, wherein the signal generating circuit 101 is used for detecting the voltage of a button cell and outputting a first level signal when the voltage is lower than a set value; as shown in fig. 1, B2 is the button cell, in the example of the present invention, the signal generating circuit 101 is connected to the power output terminal of the button cell, and the output voltage value of the button cell is checked. When the voltage is detected to be lower than the set value, the button battery is in a state of insufficient electric quantity, the signal generating circuit 101 timely checks the voltage state of the button battery, and outputs the first level signal.
The signal output circuit 102 is connected to the output terminal of the signal generating circuit 101, and the signal output circuit 102 is configured to generate a second level signal according to the first level signal. The signal output circuit 102 converts the first level signal and outputs a second level signal, so that an external electronic device can recognize the second level signal conveniently.
Further, in an embodiment of the present invention, when the first level signal is a low level signal, the second level signal is also a low level signal. Referring to fig. 1, that is, when the signal generating circuit 101 detects that the output voltage value of the button battery B2 is lower than a set value, a low level voltage is output, the low level voltage acts on the input terminal of the signal output circuit 102, and the signal output circuit 102 outputs a low level voltage under the action of the low level voltage. The external electronic equipment can know that the button battery is in a low electric quantity state by detecting the low level voltage. And an alarm signal is output to the external electronic equipment, and at the moment, the external electronic equipment can carry out preset operation, so that the abnormal problem is avoided.
Referring to fig. 1, the signal generating circuit 101 includes a first current limiting resistor R997, a filter capacitor C108 and a reset chip U3, one end of the first current limiting resistor R997 is connected to the output end of the button battery, the other end of the first current limiting resistor R997 is connected to the power supply end of the reset chip U3, one end of the filter capacitor C108 is connected to the VCC power supply end of the reset chip U3, and the other end of the filter capacitor C108 is connected to the reference ground. And when the voltage of the button battery is higher than the reset threshold value of the reset chip, the RES pin of the reset chip outputs a high level. And when the voltage of the button battery is lower than the reset threshold value of the reset chip, the RES pin of the reset chip outputs a low level.
Referring to fig. 1, the signal output circuit 102 includes a pull-up resistor R1485 and a second current-limiting resistor R1487, one end of the second current-limiting resistor R1487 is connected to the reset signal output terminal RES of the reset chip U3, the other end of the second current-limiting resistor R1487 outputs a reset signal, one end of the pull-up resistor R1485 is connected to the reset signal output terminal RES of the reset chip U3, and the other end of the pull-up resistor R1485 is connected to the power supply terminal 3V 3. As shown in fig. 1, when the button battery is in a normal state, the signal generating circuit 101 outputs a high level, and the high level acts on the second current-limiting resistor to directly output a normal signal and is a high-level voltage. When the button cell is in a low state, the signal generating circuit 101 outputs a low level, and the low level acts on the second current limiting resistor. The alarm signal is output and is a low level signal.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent replacements may be made for some of the technical features of the embodiments. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (4)
1. The utility model provides a button cell electric quantity detection circuitry that hangs down which characterized in that includes:
the signal generating circuit is used for detecting the voltage of the button battery and outputting a first level signal when the voltage is lower than a set value;
and the signal output circuit is connected with the output end of the signal generation circuit and is used for generating a second level signal according to the first level signal.
2. The button cell battery level-down detection circuit according to claim 1, wherein when the first level signal is a low level signal, the second level signal is also a low level signal.
3. The button cell power low detection circuit according to claim 1, wherein the signal generation circuit comprises a first current-limiting resistor (R997), a filter capacitor (C108) and a reset chip (U3), one end of the first current-limiting resistor (R997) is connected with the output end of the button cell, the other end of the first current-limiting resistor (R997) is connected with the power supply end of the reset chip (U3), one end of the filter capacitor (C108) is connected with the power supply end (VCC) of the reset chip (U3), and the other end of the filter capacitor (C108) is connected with a reference ground.
4. The button cell battery level low detection circuit according to claim 1, wherein the signal output circuit comprises a pull-up resistor (R1485) and a second current-limiting resistor (R1487), one end of the second current-limiting resistor (R1487) is connected to the reset signal output terminal (RES) of the reset chip (U3), the other end of the second current-limiting resistor (R1487) outputs the reset signal, one end of the pull-up resistor (R1485) is connected to the reset signal output terminal (RES) of the reset chip (U3), and the other end of the pull-up resistor (R1485) is connected to the power supply terminal (3V 3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920528145.7U CN210109276U (en) | 2019-04-16 | 2019-04-16 | Button cell electric quantity is low detection circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920528145.7U CN210109276U (en) | 2019-04-16 | 2019-04-16 | Button cell electric quantity is low detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210109276U true CN210109276U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920528145.7U Active CN210109276U (en) | 2019-04-16 | 2019-04-16 | Button cell electric quantity is low detection circuitry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210109276U (en) |
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2019
- 2019-04-16 CN CN201920528145.7U patent/CN210109276U/en active Active
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