CN217851352U - Microphone circuit, microphone and electronic product - Google Patents
Microphone circuit, microphone and electronic product Download PDFInfo
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- CN217851352U CN217851352U CN202222010042.6U CN202222010042U CN217851352U CN 217851352 U CN217851352 U CN 217851352U CN 202222010042 U CN202222010042 U CN 202222010042U CN 217851352 U CN217851352 U CN 217851352U
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Abstract
The utility model relates to a microphone circuit, microphone and electronic product, microphone circuit includes suction detecting element circuit, oil leak detecting element circuit; the method comprises the following steps: the oil leakage detection pin is arranged on the microphone circuit package and is used for detecting the equivalent resistance and/or the equivalent voltage of the environment where the microphone circuit package is located; and the detection circuit is arranged in the microphone circuit package, is electrically connected with the oil leakage detection pin, is used for judging whether the equivalent resistance and/or the equivalent voltage exceed the corresponding preset value or not, and outputs a microphone circuit working stop signal when the equivalent resistance and/or the equivalent voltage exceed the preset value. Adopt the utility model discloses a miaow head circuit both can detect the change of environment equivalent resistance and/or equivalent voltage, can guarantee again according to equivalent resistance and/or equivalent voltage's change control miaow head circuit stop work, prevents that the electronic product from still switching on and causing the incident under the oil leak condition, reduces the potential safety hazard of electronic product.
Description
Technical Field
The utility model relates to a miaow head technical field, more specifically say, relate to a miaow head circuit, miaow head and electronic product.
Background
The microphone is one of the core components of electronic products such as an electronic cigarette. The whole working principle of the electronic cigarette using the microphone switch can be summarized as follows: the user inhales, the airflow sensor (microphone) responds, the control circuit is triggered, the atomizer starts to work, and steam is generated. When stopping breathing in, the air current in the sensor disappears, and air current sensing switch closes, and control circuit's control module stops work, and the atomizer stops work. Compare with key switch, miaow head switch makes the electron cigarette more show intelligence, and the while operation is more simple and easy convenient, relatively is fit for the little cigarette of power.
However, when the electronic cigarette leaks oil, oil drops can enter the inside of the microphone, so that the electronic cigarette is triggered by mistake, and unnecessary safety accidents are caused.
For the industrial problem, no better solution is available at present.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide a miaow head circuit, miaow head and electronic product.
The utility model provides a miaow head circuit, including suction detecting element circuit, wherein, still include: an oil leak detection unit circuit; the oil leakage detection unit circuit includes: the microphone circuit package comprises an oil leakage detection pin arranged on the microphone circuit package and used for detecting the equivalent resistance and/or the equivalent voltage of the environment where the microphone circuit package is located; and the detection circuit is arranged in the microphone circuit package, is electrically connected with the oil leakage detection pin, is used for judging whether the equivalent resistance and/or the equivalent voltage exceed corresponding preset values or not, and outputs a microphone circuit working stopping signal when the equivalent resistance and/or the equivalent voltage exceed the preset values.
Microphone circuit, wherein, detection circuitry is voltage detection comparator circuit, include: input oil leak detection pin, output.
Microphone circuit, wherein, detection circuitry is voltage detection ADC circuit, include: input oil leak detection pin, output.
Microphone circuit, wherein, detection circuitry is current detection ADC circuit, include: the first input end oil leak detection pin, the second input end of being connected with power VDD, output, set up the fixed resistor between two input.
Microphone circuit, wherein, detection circuitry is current comparator circuit, include: the first input end oil leakage detection pin and the second input end are connected with a microphone circuit power supply VDD, the output end and a fixed resistor arranged between the two input ends.
Microphone circuit, wherein, detection circuitry is current detection ADC circuit, include: the power supply comprises a first input end oil leakage detection pin, a second input end connected with a power supply VDD and an output end;
applying an electric signal to the first input end oil leakage detection pin and reading the current value of the pin; simultaneously applying a detection electric signal to the second input terminal and simultaneously reading a current value of the second input terminal.
Microphone circuit, wherein, detection circuitry is voltage comparator, include: the power supply comprises a first input end oil leakage detection pin, a second input end connected with a power supply VDD and an output end;
applying an electric signal to the first input end oil leakage detection pin and reading the voltage value of the pin at the same time; applying a probing electrical signal to the second input terminal and simultaneously reading the voltage value of the second input terminal.
Miaow head circuit, wherein, the oil leak detect pin with the pin that charges on the encapsulation of miaow head circuit is multiplexing.
The utility model discloses a microphone, wherein, be provided with on the microphone as aforementioned any one microphone circuit.
The utility model discloses an electronic product, wherein, be provided with on the electronic product as aforementioned any miaow head.
The beneficial effects of the utility model reside in that: set up on the encapsulation of miaow head circuit through detecting the pin with the oil leak, set up detection circuitry in the encapsulation of miaow head circuit simultaneously, can guarantee when the environment that miaow head circuit encapsulation is located takes place the oil leak accident, detection circuitry can normally work, so both can detect the change of environment equivalent resistance and/or equivalent voltage, can guarantee again to control miaow head circuit stop work according to the change of equivalent resistance and/or equivalent voltage, prevent that electronic product from still circular telegram and causing the incident under the oil leak condition, reduce electronic product's potential safety hazard.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a first schematic diagram of a microphone circuit according to a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of a microphone circuit according to a preferred embodiment of the present invention;
fig. 3 is a circuit diagram of a voltage detection comparator for oil leakage detection according to another preferred embodiment of the present invention;
fig. 4 is a circuit diagram of a second embodiment of the oil leakage detection voltage detection comparator according to the present invention;
fig. 5 is a circuit diagram of a voltage detection ADC scheme in an oil leakage detection circuit according to another preferred embodiment of the present invention;
FIG. 6 is a circuit diagram of a second voltage detection ADC scheme in the oil leakage detection circuit according to another preferred embodiment of the present invention;
fig. 7 is a circuit diagram of a current detection ADC scheme in the oil leakage detection circuit according to another preferred embodiment of the present invention;
fig. 8 is a circuit diagram of a second current detection ADC scheme in the oil leakage detection circuit according to another preferred embodiment of the present invention;
fig. 9 is a circuit diagram of an ADC scheme when both VDD and CHG have oil leakage in the oil leakage detection circuit according to the preferred embodiment of the present invention;
fig. 10 is a circuit diagram of the comparator scheme when both VDD and CHG have oil leakage in the oil leakage detection circuit according to the preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The utility model discloses a in the preferred embodiment, provide a miaow head circuit, it includes: the suction detection unit circuit and the oil leakage detection unit circuit adopt the oil leakage detection method.
As shown in fig. 1 and 2, the oil leakage detecting unit circuit includes: the oil leakage detection pin is arranged on the microphone circuit package and is used for detecting the equivalent resistance and/or the equivalent voltage of the environment where the microphone circuit package is located; and the detection circuit is arranged in the microphone circuit package, is electrically connected with the oil leakage detection pin, is used for judging whether the equivalent resistance and/or the equivalent voltage exceed the corresponding preset value or not, and outputs a microphone circuit working stopping signal when the equivalent resistance and/or the equivalent voltage exceed the preset value. Wherein, the preset value can be set as the range of possible equivalent resistance values of oil drops: 1K omega-1M omega, 1K omega-200K omega, 50K omega-200K omega, 82308230, or setting the preset value as the equivalent voltage value range calculated according to the equivalent resistance value range. The preset value may vary with different microphone circuit schemes and environments, but should be considered within the scope of the present invention.
When no oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin is equal to the ground, and the voltage is 0V; when the oil leakage phenomenon happens outside the microphone circuit package, the oil leakage detection pin is equivalent to an externally connected load, the equivalent resistance value of the load is different due to the fact that specific oil drops leak, the voltage value on the oil leakage detection pin can change, the voltage comparator outputs the change to the suction detection unit circuit or other circuits of the microphone circuit through the output end, the microphone circuit is controlled to stop working, and therefore various dangerous accidents caused by oil leakage are avoided.
The utility model discloses a miaow head circuit, through setting up the oil leakage detection pin in the encapsulation of miaow head circuit, set up detection circuitry in the encapsulation of miaow head circuit simultaneously, can guarantee when the oily accident of leaking takes place for the environment that miaow head circuit encapsulation is located, detection circuitry can normally work, so both can detect the change of environment equivalent resistance and/or equivalent voltage, can guarantee again to control miaow head circuit stop work according to equivalent resistance and/or equivalent voltage's change, prevent that electronic product from still switching on and causing the incident under the oil leak condition, electronic product's potential safety hazard has been reduced.
Further, in the microphone circuit, an intermittent or continuous electric signal, such as a pulse signal, is applied to the oil leakage detection pin.
Further, in the microphone circuit, as shown in fig. 2, the oil leakage detection pin is multiplexed with the charging pin of the microphone circuit. Therefore, the internal detection circuit can be directly added on the basis of the six-pin packaging of the original microphone circuit, and the purpose of oil leakage detection can be achieved. The adverse consequences of the increase of the packaging size and the increase of the cost of the microphone circuit due to the increase of the pins can be avoided.
Further, the detection circuit in the microphone circuit is a voltage detection comparator or a current comparator, or other circuits with the same function, as shown in fig. 3-10.
Example one
As shown in fig. 3 and 4, referring to fig. 1 and 2, the detection circuit in the microphone circuit is a voltage detection comparator circuit, which includes: input oil leak detection pin OLD, output OUTPU. The oil leakage detection pin OLD is arranged on the encapsulation of the microphone circuit and is multiplexed with the charging pin CHG of the microphone circuit, and can detect whether oil leaks outside the encapsulation of the microphone circuit; the voltage comparator and the output end thereof are arranged in the encapsulation of the microphone circuit so as to ensure that the microphone circuit can work normally under the oil leakage state.
When the microphone circuit works normally, an electric signal is applied to the oil leakage detection pin OLD, the voltage value of the pin is read at the same time, the other input end of the voltage comparator is connected with a reference voltage REF, and a result is output after comparison through the voltage comparator. When no oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equal to the ground, and the voltage is 0V; when the oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equivalent to an externally connected load, the equivalent resistance value RX of the load is different due to the specific oil drop condition of the leakage, the voltage value on the oil leakage detection pin OLD can change, the voltage comparator OUTPUTs the change to the suction detection unit circuit or other circuits of the microphone circuit through the OUTPUT end OUTPUT to control the microphone circuit to stop working, and therefore various dangerous accidents caused by the oil leakage are avoided.
In the process, the voltage comparator circuit is arranged in the encapsulation of the microphone circuit, and even if the environment where the voltage comparator circuit is located has an oil leakage accident, the circuit in the voltage comparator circuit can work normally, so that compared with various oil leakage detection or prevention modes in the prior art, the detection method of the embodiment is more reliable, the safety of the microphone circuit is greatly improved, the safety of an electronic product using the microphone circuit is further improved, and the effect brought by the oil leakage detection method and the circuit of the embodiment is very obvious.
In addition, since the oil leak detection pin OLD in this embodiment is multiplexed with the charging pin CHG of the microphone circuit, and no additional pin is required, the microphone circuit can continue to use a six-pin package structure, thereby avoiding an increase in cost of the microphone circuit due to an increase in package size.
Example two
As shown in fig. 5 and fig. 6, referring to fig. 1 and fig. 2, the detection circuit in the microphone circuit is a voltage detection ADC circuit, which includes: input oil leak detection pin OLD, OUTPUT OUTPUT. The oil leakage detection pin OLD is arranged on the encapsulation of the microphone circuit and is multiplexed with the charging pin CHG of the microphone circuit, and can detect whether oil leaks outside the microphone circuit encapsulation or not; the voltage detection ADC circuit and the output end thereof are arranged inside the packaging of the microphone circuit, so that the microphone circuit can work normally under the oil leakage state.
When the microphone circuit normally works, an electric signal is applied to the oil leakage detection pin OLD, the voltage value of the pin is read at the same time, and the result is output after comparison through the voltage detection ADC circuit. When no oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equal to the ground, and the voltage is 0V; when the oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equivalent to an externally connected load, the equivalent resistance value RX of the load is different due to the specific oil drop condition of leakage, the voltage value on the oil leakage detection pin OLD can change, the voltage detection ADC circuit OUTPUTs the change to the suction detection unit circuit or other circuits of the microphone circuit through the OUTPUT end OUTPUT to control the microphone circuit to stop working, and therefore various dangerous accidents caused by the oil leakage are avoided.
In the process, the voltage detection ADC circuit is arranged in the encapsulation of the microphone circuit, so that even if oil leakage accidents happen to the environment where the voltage detection ADC circuit is located, the internal circuit can work normally. Therefore, compared with various oil leakage detection or prevention modes in the prior art, the detection method is more reliable, the safety of the microphone circuit is greatly improved, and the safety of an electronic product using the microphone circuit is further improved. Therefore, the oil leakage detection method and the circuit of the present embodiment have very significant effects.
In addition, since the oil leak detection pin OLD in this embodiment is multiplexed with the charging pin CHG of the microphone circuit, and no additional pin is required, the microphone circuit can continue to use a six-pin package structure, thereby avoiding an increase in cost of the microphone circuit due to an increase in package size.
EXAMPLE III
As shown in fig. 7, referring to fig. 1 and fig. 2, the detection circuit in the microphone circuit is a current detection ADC circuit, which includes: the first input end oil leakage detection pin OLD, the second input end connected with the power supply VDD, the OUTPUT end OUTPUT and a fixed resistor R1 arranged between the two input ends. The oil leakage detection pin OLD is arranged on the encapsulation of the microphone circuit and is multiplexed with the charging pin CHG of the microphone circuit, and can detect whether oil leaks outside the microphone circuit encapsulation or not; current detection ADC circuit and its output set up in the encapsulation of miaow head circuit inside to guarantee that it also can normally work under the oil leak state.
When the microphone circuit normally works, an electric signal is applied to the oil leakage detection pin OLD, the current value of the pin is read at the same time, and the result is output after the current is processed by the current detection ADC circuit. When no oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equal to the ground, and the current is 0; when the oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equivalent to an external load, the size of the equivalent resistance value RX of the load is different due to the fact that specific oil drops leak, the current value on the oil leakage detection pin OLD changes, the current detection ADC circuit OUTPUTs the change to the suction detection unit circuit or other circuits of the microphone circuit through the OUTPUT end OUTPUT to control the microphone circuit to stop working, and therefore various dangerous accidents caused by the oil leakage are avoided.
In the process, the current detection ADC circuit is arranged in the encapsulation of the microphone circuit, so that even if oil leakage accidents happen to the environment where the current detection ADC circuit is located, the internal circuit can work normally. Therefore, compared with various oil leakage detection or prevention modes in the prior art, the detection method is more reliable, the safety of the microphone circuit is greatly improved, and the safety of an electronic product using the microphone circuit is further improved. Therefore, the oil leakage detection method and the circuit of the present embodiment have very significant effects.
In addition, since the oil leak detection pin OLD in this embodiment is multiplexed with the charging pin CHG of the microphone circuit, and no additional pin is required, the microphone circuit can continue to use a six-pin package structure, thereby avoiding an increase in cost of the microphone circuit due to an increase in package size.
Example four
As shown in fig. 8, referring to fig. 1 and fig. 2, the detection circuit in the microphone circuit is a current comparator circuit, which includes: the first input end oil leakage detection pin OLD, the second input end are connected with a microphone circuit power supply VDD, an OUTPUT end OUTPUT and a fixed resistor R1 arranged between the two input ends. The oil leakage detection pin OLD is arranged on the encapsulation of the microphone circuit and is multiplexed with the charging pin CHG of the microphone circuit, and can detect whether oil leaks outside the encapsulation of the microphone circuit; the current comparator circuit and the output end thereof are arranged in the packaging of the microphone circuit so as to ensure that the microphone circuit can work normally under the oil leakage state.
When the microphone circuit normally works, an electric signal is applied to the oil leakage detection pin OLD, the current value of the pin is read at the same time, and the result is output after the current value is processed by the current comparator circuit. When no oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equal to the ground, and the current is 0; when the oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equivalent to an externally connected load, the equivalent resistance value RX of the load is different due to the specific oil drop condition of leakage, the current value on the oil leakage detection pin OLD can change, the current comparator circuit OUTPUTs the change to the suction detection unit circuit or other circuits of the microphone circuit through the OUTPUT end OUTPUT to control the microphone circuit to stop working, and therefore various dangerous accidents caused by the oil leakage are avoided.
In the process, the current comparator circuit is arranged in the packaging of the microphone circuit, so that the internal circuit can work normally even if oil leakage accidents happen to the environment where the current comparator circuit is located. Therefore, compared with various oil leakage detection or prevention modes in the prior art, the detection method is more reliable, the safety of the microphone circuit is greatly improved, and the safety of an electronic product using the microphone circuit is further improved. Therefore, the oil leakage detection method and the circuit of the present embodiment have very significant effects.
In addition, since the oil leak detection pin OLD in this embodiment is multiplexed with the charging pin CHG of the microphone circuit, and no additional pin is required, the microphone circuit can continue to use a six-pin package structure, thereby avoiding an increase in cost of the microphone circuit due to an increase in package size.
EXAMPLE five
As shown in fig. 9, referring to fig. 1 and fig. 2, the detection circuit in the microphone circuit is a current detection ADC circuit, which includes: first input oil leak detection pin OLD, the second input that is connected with power VDD, OUTPUT OUTPUT. The oil leakage detection pin OLD is arranged on the encapsulation of the microphone circuit and is multiplexed with the charging pin CHG of the microphone circuit, and can detect whether oil leaks outside the microphone circuit encapsulation or not; the current detection ADC circuit and the output end thereof are arranged in the packaging of the microphone circuit so as to ensure that the microphone circuit can normally work under the oil leakage state.
When the microphone circuit normally works, applying an electric signal to the first input end oil leakage detection pin OLD and simultaneously reading the current value of the pin; simultaneously applying a probing electrical signal to the second input terminal and simultaneously reading the current value of the pin. And after the signals of the two input ends are processed by the current detection ADC circuit, the result is output.
When no oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equal to ground, and the current is 0. When the oil leakage phenomenon occurs outside the microphone circuit package, and when both VDD and CHG of the microphone circuit have the oil leakage condition, the first input end oil leakage detection pin OLD is equivalent to an external "load", the second input end power supply pin VDD is also equivalent to an external "load", the equivalent resistance values RX1 and RX2 of the two "loads" are different due to the specific oil drop condition of the leakage, and the current values on the two input ends can change, the current detection ADC circuit OUTPUTs the change to the suction detection unit circuit or other circuits of the microphone circuit through the OUTPUT end OUTPUT, and the microphone circuit is controlled to stop working, so that various dangerous accidents caused by the oil leakage are avoided.
In the process, the current detection ADC circuit is arranged in the encapsulation of the microphone circuit, so that even if oil leakage accidents happen to the environment where the current detection ADC circuit is located, the internal circuit can work normally. Therefore, compared with various oil leakage detection or prevention modes in the prior art, the detection method is more reliable, the safety of the microphone circuit is greatly improved, and the safety of an electronic product using the microphone circuit is further improved. Therefore, the oil leakage detection method and the circuit of the present embodiment have very significant effects.
In addition, since the oil leak detection pin OLD in this embodiment is multiplexed with the charging pin CHG of the microphone circuit, and no additional pin is required, the microphone circuit can continue to use a six-pin package structure, thereby avoiding an increase in cost of the microphone circuit due to an increase in package size.
EXAMPLE six
As shown in fig. 10, referring to fig. 1 and fig. 2, the detection circuit in the microphone circuit is a voltage comparator, which includes: first input oil leak detection pin OLD, the second input that is connected with power VDD, OUTPUT OUTPUT. The oil leakage detection pin OLD is arranged on the encapsulation of the microphone circuit and is multiplexed with the charging pin CHG of the microphone circuit, and can detect whether oil leaks outside the microphone circuit encapsulation or not; the voltage comparator and the output end thereof are arranged in the packaging of the microphone circuit so as to ensure that the microphone circuit can work normally under the oil leakage state.
When the microphone circuit normally works, an electric signal is applied to the first input end oil leakage detection pin OLD, and the voltage value of the pin is read at the same time; simultaneously applying a probing electrical signal to the second input terminal and simultaneously reading the voltage value of the pin. And (4) processing the signals of the two input ends by the voltage comparator, and outputting a result.
When no oil leakage phenomenon occurs outside the microphone circuit package, the oil leakage detection pin OLD is equal to ground, and the voltage is 0. When the oil leakage phenomenon occurs outside the microphone circuit package, and when both VDD and CHG of the microphone circuit have the oil leakage condition, the first input end oil leakage detection pin OLD is equivalent to an external "load", the second input end power supply pin VDD is also equivalent to an external "load", the equivalent resistance values RX1 and RX2 of the two "loads" are different due to the specific oil drop condition of the leakage, and the voltage values on the two input ends can change, the voltage comparator OUTPUTs the change to the suction detection unit circuit or other circuits of the microphone circuit through the OUTPUT end OUTPUT, and the microphone circuit is controlled to stop working, so that various dangerous accidents caused by the oil leakage are avoided.
In the process, the voltage comparator circuit is arranged in the encapsulation of the microphone circuit, so that even if the environment where the voltage comparator circuit is located has an oil leakage accident, the internal circuit can still work normally. Therefore, compared with various oil leakage detection or prevention modes in the prior art, the detection method is more reliable, the safety of the microphone circuit is greatly improved, and the safety of an electronic product using the microphone circuit is further improved. Therefore, the oil leakage detection method and the circuit of the present embodiment have very significant effects.
In addition, since the oil leak detection pin OLD in this embodiment is multiplexed with the charging pin CHG of the microphone circuit, and no additional pin is required, the microphone circuit can continue to use a six-pin package structure, thereby avoiding an increase in cost of the microphone circuit due to an increase in package size.
The utility model discloses in a further embodiment, provide a miaow head, be provided with on this miaow head have in any preceding embodiment miaow head circuit, perhaps include the miaow head circuit goods of above-mentioned miaow head circuit.
In a further embodiment of the present invention, an electronic product is provided, wherein the electronic product is provided with a microphone as described in any of the foregoing embodiments. Moreover, the electronic product is not limited to the electronic cigarette, and may be other electronic products to which the microphone is applied.
To sum up, the utility model discloses a set up the oil leak detection pin in the encapsulation of miaow head circuit, set up detection circuitry in the encapsulation of miaow head circuit simultaneously, can guarantee when the environment of miaow head circuit encapsulation department takes place the oil leak accident, detection circuitry can normally work, so both can detect the change of environment equivalent resistance and/or equivalent voltage, can guarantee again to control miaow head circuit stop work according to the change of equivalent resistance and/or equivalent voltage, prevent that the electronic product from still switching on and causing the incident under the oil leak condition, reduce the potential safety hazard of electronic product.
Compare various oil leak detection methods among the prior art, the utility model discloses a detection method is more reliable, has promoted the security of miaow head circuit greatly to further promotion has used the security of the electronic product of this miaow head circuit.
Moreover, because the utility model provides an oil leak detection pin OLD can multiplex with the pin CHG that charges of miaow head circuit, need not increase extra pin for miaow head circuit can follow the packaging structure of six pins, has avoided the miaow head circuit cost-push that leads to because of the encapsulation size increases, consequently the utility model discloses an oil leak detection method and circuit have very big practicality, easily use widely.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (10)
1. The utility model provides a miaow head circuit, includes suction detecting element circuit, its characterized in that still includes: an oil leak detection unit circuit; the oil leakage detection unit circuit includes: the microphone circuit package comprises an oil leakage detection pin arranged on the microphone circuit package and used for detecting the equivalent resistance and/or the equivalent voltage of the environment where the microphone circuit package is located; and the detection circuit is arranged in the microphone circuit package, is electrically connected with the oil leakage detection pin, and is used for judging whether the equivalent resistance and/or the equivalent voltage exceed corresponding preset values or not and outputting a microphone circuit working stopping signal when the equivalent resistance and/or the equivalent voltage exceed the preset values.
2. The microphone circuit of claim 1 wherein the detection circuit is a voltage detection comparator circuit comprising: input oil leak detection pin, output.
3. The microphone circuit of claim 1, wherein the detection circuit is a voltage detection (ADC) circuit comprising: input oil leak detection pin, output.
4. The microphone circuit of claim 1 wherein the detection circuit is a current sense ADC circuit comprising: the power supply comprises a first input end oil leakage detection pin, a second input end connected with a power supply VDD, an output end and a fixed resistor arranged between the two input ends.
5. The microphone circuit of claim 1 wherein the detection circuit is a current comparator circuit comprising: the first input end oil leakage detection pin and the second input end are connected with a microphone circuit power supply VDD, the output end and a fixed resistor arranged between the two input ends.
6. The microphone circuit of claim 1, wherein the detection circuit is a current sense ADC circuit comprising: the power supply comprises a first input end oil leakage detection pin, a second input end connected with a power supply VDD and an output end;
applying an electric signal to the first input end oil leakage detection pin and reading the current value of the pin; simultaneously applying a detection electrical signal to the second input terminal and simultaneously reading a current value of the second input terminal.
7. The microphone circuit of claim 1, wherein the detection circuit is a voltage comparator comprising: the power supply comprises a first input end oil leakage detection pin, a second input end connected with a power supply VDD and an output end;
applying an electric signal to the first input end oil leakage detection pin and reading the voltage value of the pin at the same time; and applying a detection electric signal to the second input end and simultaneously reading the voltage value of the second input end.
8. The microphone circuit of claim 1 wherein the oil leak detection pin is multiplexed with a charging pin on the microphone circuit package.
9. A microphone, characterized in that the microphone is provided with a microphone circuit according to any of claims 1-8.
10. An electronic product, characterized in that the electronic product is provided with the microphone according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222010042.6U CN217851352U (en) | 2022-08-01 | 2022-08-01 | Microphone circuit, microphone and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222010042.6U CN217851352U (en) | 2022-08-01 | 2022-08-01 | Microphone circuit, microphone and electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217851352U true CN217851352U (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222010042.6U Active CN217851352U (en) | 2022-08-01 | 2022-08-01 | Microphone circuit, microphone and electronic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217851352U (en) |
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2022
- 2022-08-01 CN CN202222010042.6U patent/CN217851352U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |