CN220423150U - Current detection circuit and electronic atomization device - Google Patents

Abstract

The application discloses a current detection circuit. Comprises an atomizer, a power supply and a control circuit. The atomizer is for atomizing an aerosol-forming substrate to generate an aerosol. The power supply is used for supplying power to the atomizer and the control circuit respectively. The control circuit comprises a charge and discharge branch, an amplifying branch and a controller. The charge and discharge branch circuit is electrically connected with a power supply. The power supply detection branch generates a charging voltage based on the charging current when the power supply is charged, and generates a discharging voltage based on the discharging current when the power supply is discharged. The amplifying branch circuits are respectively and electrically connected with the charging and discharging branch circuits and the controller. The amplifying branch amplifies the charging voltage and outputs a first voltage to the controller to enable the controller to determine the charging current based on the first voltage, or the amplifying branch amplifies the discharging voltage and outputs a second voltage to the controller to enable the controller to determine the discharging current based on the second voltage. By the mode, the purpose of reducing cost can be achieved.

Description

Current detection circuit and electronic atomization device

Technical Field

The application relates to the technical field of electronic atomization, in particular to a current detection circuit and an electronic atomization device.

Background

The electronic atomizing device is used to heat an aerosol-forming substrate, which may be a liquid substrate such as tobacco tar, to produce a smokable aerosol; but also solid substrates such as aerosol-generating articles, i.e. cigarettes.

The electronic atomizing device is provided with a power source, such as a battery. The power supply may be discharged to power the devices in the electronic atomizing apparatus, or may be charged. And, detection of the charging current or discharging current of the power supply is generally required.

However, in the current detection method, current detection loops are generally disposed for discharging and charging of the power supply, i.e. two current detection loops are needed, which is costly.

Disclosure of Invention

The application aims at providing a current detection circuit and electronic atomization device, and the purpose of reducing cost can be achieved.

To achieve the above object, in a first aspect, the present application provides a current detection circuit, including:

the power supply is used for supplying power to the control circuit;

the control circuit comprises a charge and discharge branch, an amplifying branch and a controller;

the charging and discharging branch circuit is electrically connected with the power supply, and is used for generating a charging voltage based on the charging current when the power supply is charged and generating a discharging voltage based on the discharging current when the power supply is discharged;

the amplifying branch is respectively and electrically connected with the charging and discharging branch and the controller, and is used for amplifying the charging voltage and outputting a first voltage to the controller so that the controller can determine the charging current based on the first voltage, or is used for amplifying the discharging voltage and outputting a second voltage to the controller so that the controller can determine the discharging current based on the second voltage.

In an alternative manner, the charge-discharge branch comprises a first resistor, the first resistor being electrically connected;

the first resistor is configured to generate a charging voltage across the first resistor when a charging current flows, and to generate a discharging voltage across the first resistor when a discharging current flows.

In an alternative manner, the first end of the first resistor is electrically connected to the power supply and the first input terminal of the amplifying branch, respectively, and the second end of the first resistor is electrically connected to the second input terminal of the amplifying branch.

In an alternative, the amplifying branch is also electrically connected to a reference voltage;

when the current flowing through the charge and discharge branch is zero, the voltage output by the amplifying branch is equal to the reference voltage.

In an alternative mode, the amplifying branch comprises an operational amplifier, and the operational amplifier is electrically connected with the charging and discharging branch, the controller and the reference voltage respectively;

the operational amplifier is configured to output a first voltage based on the reference voltage and the charging voltage, and to output a second voltage based on the reference voltage and the discharging voltage.

In an alternative manner, the operational amplifier is further configured to output a first voltage based on a difference between the reference voltage and the voltage amplified by the charging voltage, and to output a second voltage based on a sum of the reference voltage and the voltage amplified by the discharging voltage.

In an alternative mode, the in-phase input end of the operational amplifier is electrically connected with the power supply and the first end of the charge-discharge branch respectively, the inverting input end of the operational amplifier is electrically connected with the second end of the charge-discharge branch, and the reference end of the operational amplifier is electrically connected with the reference voltage.

In an alternative manner, the amplifying branch further comprises a second resistor and a first capacitor;

the first end of the second resistor is electrically connected with the output end of the operational amplifier, the second end of the second resistor is electrically connected with the first end of the first capacitor and the controller respectively, and the second end of the first capacitor is grounded.

In an alternative way, the amplifying branch further comprises a second capacitor;

the first end of the second capacitor is electrically connected with the first power supply voltage and the power supply end of the operational amplifier respectively, and the second end of the second capacitor is grounded.

In a second aspect, the present application provides an electronic atomizing device, the electronic atomizing device comprising:

a nebulizer for nebulizing an aerosol-forming substrate to generate an aerosol;

and a current detection circuit as described above.

The beneficial effects of this application are: the current detection circuit comprises an atomizer, a power supply and a control circuit. Wherein the atomizer is for atomizing an aerosol-forming substrate to generate an aerosol. The power supply is used for supplying power to the atomizer and the control circuit respectively. The control circuit comprises a charge and discharge branch, an amplifying branch and a controller. The charge and discharge branch circuit is electrically connected with a power supply. When the power supply is charged, the charging and discharging branch circuit generates a charging voltage, and the charging voltage is input to the amplifying branch circuit. The amplifying branch amplifies the charging voltage and outputs a first voltage to the controller. The controller is then able to determine a charging current based on the first voltage. When the power supply discharges, the charge-discharge branch circuit generates a discharge voltage based on the discharge current, and inputs the discharge voltage to the amplifying branch circuit. The amplifying branch amplifies the discharge voltage and outputs a second voltage to the controller. The controller may then determine a discharge current based on the second voltage. Through the process, the detection of the charging current and the discharging current is realized. And only one charge and discharge branch is needed, compared with the technical scheme that current detection loops are respectively arranged for discharging and charging of a power supply in the related art, the cost is low, and therefore the purpose of reducing the cost is achieved.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic structural diagram of a current detection circuit according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a control circuit according to an embodiment of the present disclosure;

fig. 3 is a schematic circuit diagram of a control circuit according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The term "aerosol-forming substrate" refers to a material that provides a volatile component in aerosol form when heated. In some embodiments, the aerosol-generating article may comprise a tobacco component, wherein the tobacco component is any material comprising tobacco or derivatives thereof. The tobacco component may comprise one or more of crushed tobacco, tobacco fibers, cut filler, pressed tobacco, tobacco stems, tobacco flakes, and/or tobacco extracts. In some embodiments, the aerosol-forming substrate may comprise a tobacco substitute.

An electronic atomising device refers to any device which, in use, generates an aerosol from an aerosol-forming substrate. In particular, an apparatus is known which heats an aerosol-forming substrate to form an inhalable aerosol without burning or igniting the aerosol-generating article. Such devices are sometimes described as "heating non-combustion" devices or "tobacco heating products" or "tobacco heating devices" or the like.

Similarly, there are also so-called e-cigarette devices, which typically evaporate an aerosol-forming substrate in liquid form, which may or may not contain nicotine. In other embodiments, the electronic atomizing device provides the aerosol or vapor by heating an aerosol-forming substrate in solid form. In a particular embodiment, the electronic atomizing device is a tobacco heating product.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic atomization device according to an embodiment of the present application. As shown in fig. 1, the electronic atomizing apparatus 100 includes an atomizer 10 and a current detection circuit. The current detection circuit includes a power supply 20 and a control circuit 30.

The atomizer 10 is for atomizing an aerosol-forming substrate to generate an aerosol. Wherein the aerosol-forming substrate is a substrate capable of releasing volatile compounds that can form an aerosol. Such volatile compounds may be released by heating the aerosol-forming substrate.

In some embodiments, the aerosol-forming substrate is a solid aerosol-forming substrate. Alternatively, the aerosol-forming substrate comprises solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material comprising volatile tobacco flavour compounds that are released from the substrate upon heating. Alternatively, the aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may further comprise an aerosol former. Examples of suitable aerosol formers are glycerol and propylene glycol.

The power supply 20 is used to power the atomizer 10 and the control circuit 30. In one embodiment, the power source 20 is a battery. The battery may be a lithium ion battery, a lithium metal battery, a lead-acid battery, a nickel-cadmium battery, a nickel-hydrogen battery, a lithium-sulfur battery, a lithium-air battery, a sodium ion battery, or the like, and is not limited herein. In terms of scale, the battery in the embodiments of the present application may be a battery cell, or may be a battery module formed by connecting a plurality of battery cells in series and/or in parallel, and the like, which is not limited herein. Of course, in other embodiments, the battery may include more or fewer elements, or have different element configurations, which are not limited in this regard.

In some embodiments, power supply 20 is electrically connected to powered device and charging device, respectively, through control circuit 30. The power supply 20 discharges to the powered device through the control circuit 30, or the charging device charges the power supply 20 through the control circuit 30. The control circuit 30 is also capable of detecting the discharge current and the charge current of the power supply 20. In one embodiment, the control circuit 30 may be disposed on a Printed Circuit Board (PCB).

In this application, the electric device mainly includes a device (such as the atomizer 10) that needs to be powered by the power supply 20 in the electronic atomization device 100. The charging device is a tool or device for charging a battery or the like, such as a charger, a charger bank, or the like.

It should be noted that the hardware configuration of the electronic atomizing apparatus 100 shown in fig. 1 is only one example, and the electronic atomizing apparatus 100 may have more or less components than those shown in the drawings, may combine two or more components, or may have different component configurations, and various components shown in the drawings may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application-specific integrated circuits.

Meanwhile, it is understood that the electronic atomization device 100 shown in fig. 1 can be applied to a plurality of different occasions and can perform different functions, and the embodiment of the present application is not limited thereto. For example, in an embodiment, the electronic atomization device 100 is applied to the medical field, and in this case, the electronic atomization device 100 may be a medical atomizer, which can perform atomization on a liquid medicine added into the medical atomizer and enable a patient to inhale the medical atomizer, so as to achieve an effect of adjuvant therapy. In another embodiment, the electronic atomization device 100 may also be used as an electronic product, such as an electronic cigarette, where the electronic cigarette is an electronic product that is inhaled by a user after the nicotine solution is turned into aerosol by atomization.

Referring to fig. 2, fig. 2 is a schematic diagram of a control circuit 30 according to an embodiment of the present disclosure. As shown in fig. 2, the control circuit 30 includes a charge-discharge branch 31, an amplifying branch 32, and a controller 33.

The charging and discharging branch 31 is electrically connected to the power supply 20, and the power supply 20 is electrically connected to the electric device 200 and the charging device 300 through the charging and discharging branch 31. The amplifying branches 32 are electrically connected to the charge and discharge branches 31 and the controller 33, respectively.

Specifically, charging and discharging branch 31 is configured to generate a charging voltage based on a charging current when charging device 300 charges power supply 20, and to generate a discharging voltage based on a discharging current when power supply 20 discharges power to powered device 200. The amplifying branch 32 is used to amplify the charging voltage and output a first voltage to the controller 33 to cause the controller 33 to determine the charging current based on the first voltage, or the amplifying branch 32 is used to amplify the discharging voltage and output a second voltage to the controller 33 to cause the controller 33 to determine the discharging current based on the second voltage.

In practical application, when the charging device 300 charges the power supply 20 through the charging and discharging branch 31, a charging voltage is generated on the charging and discharging branch 31, and the charging voltage is input to the amplifying branch 32. The amplifying branch 32 amplifies the charging voltage and outputs a first voltage to the controller 33. In turn, the controller 33 can determine the charging current based on the first voltage.

When the power supply 20 discharges to the electric device 200 through the charge-discharge branch 31, the charge-discharge branch 31 generates a discharge voltage based on the discharge current, and inputs the discharge voltage to the amplifying branch 32. The amplifying branch 32 amplifies the discharge voltage and outputs a second voltage to the controller 33. In turn, the controller 33 may determine the discharge current based on the second voltage.

Through the process, the detection of the charging current and the discharging current is realized. In addition, only one charge and discharge branch 31 is needed, so that the cost is lower compared with the technical scheme that current detection loops are respectively arranged for discharging and charging the power supply 20 in the related art, and the purpose of reducing the cost is achieved.

In some embodiments, controller 33 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a single-chip, ARM (Acorn RISC Machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. Also, the controller 33 may be any conventional processor, controller, microcontroller, or state machine. The controller 33 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP, and/or any other such configuration.

Referring to fig. 3, one circuit configuration of the control circuit 100 is schematically shown in fig. 3.

In one embodiment, as shown in fig. 3, the charge-discharge branch 31 includes a first resistor R. The first resistor R1 is electrically connected to the power source 20, and the first resistor R1 is also electrically connected to the charging device 300 and the powered device 200, respectively.

Specifically, a first end of the first resistor R1 is electrically connected to the power source 20 and a first input end of the amplifying branch 32, and a second end of the first resistor R1 is electrically connected to the charging device 300, the electric device 200, and a second input end of the amplifying branch 32.

Wherein the first resistor R1 is configured to generate a charging voltage across the first resistor R1 when a charging current flows, and to generate a discharging voltage across the first resistor R1 when a discharging current flows.

In one embodiment, the amplifying branch 32 includes an op-amp U1. The operational amplifier U1 is electrically connected to the charge and discharge branch 31, the controller 33, and the reference voltage VREF, respectively.

The operational amplifier U1 is an operational amplifier, which is an electronic amplifier and has the characteristics of high gain, good stability, high input impedance, low output impedance and the like. The op amp may amplify the weak signal to a sufficient degree for various signal processing.

Specifically, the non-inverting input end of the op-amp U1 (i.e., the 4 th pin of the op-amp U1) is electrically connected to the power supply 20 and the first end of the charge-discharge branch 31, the inverting input end of the op-amp U1 (i.e., the 5 th pin of the op-amp U1) is electrically connected to the second end of the charge-discharge branch 31, the charging device 300 and the powered device 200, and the reference end of the op-amp U1 (i.e., the 1 st pin of the op-amp U1) is electrically connected to the reference voltage VREF.

Wherein the operational amplifier U1 is configured to output a first voltage based on the reference voltage VREF and the charging voltage, and to output a second voltage based on the reference voltage VREF and the discharging voltage.

In some embodiments, the operational amplifier U1 is configured to output the first voltage based on a difference between the reference voltage VREF and the amplified voltage of the charging voltage. The operational amplifier U1 is further configured to output a second voltage based on a sum between the reference voltage VREF and the amplified voltage of the discharge voltage.

In this embodiment, by setting the reference voltage VREF, the voltage output by the op-amp U1 can be made equal in magnitude to the reference voltage VREF when the current flowing through the first resistor R1 is 0. Thus, when the charging device 300 charges the power supply 20, the voltage output by the op amp U1 decreases on the basis of the reference voltage VREF; when the power supply 20 discharges to the electric device 200, the voltage output by the operational amplifier U1 increases on the basis of the reference voltage VREF.

In some embodiments, op-amp U1 functions by: vout=vref+k× [ (vin+) - (VIN-) ] (1). Wherein VOUT is the voltage output by the op-amp U1, VREF is the reference voltage, vin+ is the voltage at the non-inverting input terminal of the op-amp U1, VIN-is the voltage at the inverting input terminal of the op-amp U1, and K is the amplification factor.

IN some embodiments, the op-amp employs an IN199A1 model differential op-amp.

In an embodiment, the amplifying branch 32 further includes a second resistor R2 and a first capacitor C1.

The first end of the second resistor R2 is electrically connected to the output end of the op-amp U1 (i.e., the 6 th pin of the op-amp U1), the second end of the second resistor R2 is electrically connected to the first end of the first capacitor C1 and the controller 33, and the second end of the first capacitor C1 is grounded GND.

Specifically, the second resistor R2 is used to limit the current input to the controller 33, and the first capacitor C1 is used to filter the first voltage or the second voltage.

In an embodiment, the amplifying branch 32 further comprises a second capacitor C2.

The first end of the second capacitor C2 is electrically connected to the first supply voltage V1 and the supply end of the op-amp U1 (i.e., the 3 rd pin of the op-amp U1), respectively, and the second end of the second capacitor C2 is grounded GND.

Specifically, the second capacitor C2 is used to filter the first supply voltage V1.

It should be noted that, since different types of op-amps exist, when different types of op-amps are used, specific pin definitions may be different, but the functions and signal definitions are the same. If other types of op-amps are used, they may be configured in a similar manner to the above embodiments, which are within the scope of those skilled in the art and will not be described here again.

The principle of the circuit configuration shown in fig. 3 is explained below.

When power supply 20 discharges to powered device 200 through first resistor R1, the current discharged by power supply 20 flows through first resistor R1. The first resistor R1 generates a discharge voltage, and the voltage of the first end of the first resistor R1 is greater than the voltage of the second end of the first resistor R1. At this time, the voltage input to the non-inverting input terminal of the op-amp U1 is greater than the voltage input to the inverting input terminal of the op-amp U1, (vin+) > (VIN-), i.e., (vin+) - (VIN-) > 0. Next, the operational amplifier U1 amplifies the voltage across the first resistor R1, and calculates the sum between the reference voltage and the amplified voltage of the discharge voltage. The voltage output by the operational amplifier U1 is vout=vref+kx [ (vin+) - (VIN-) ] > VREF. VOUT is a first voltage at this time, and the first voltage is greater than the reference voltage VREF. The first voltage is input to the controller 33. When the reference voltages VREF, K and the resistance of the first resistor R1 are all determined, the controller 33 determines the discharge voltage (i.e., [ (vin+) - (VIN-) ]) based on the first voltage, and further derives the magnitude of the discharge current when the power supply 20 is discharged based on ohm's law.

When the charging device 300 charges the power supply 20 through the first resistor R1, a current discharged from the power supply 20 flows through the first resistor R1. The first resistor R1 generates a charging voltage, and the voltage of the first end of the first resistor R1 is smaller than the voltage of the second end of the first resistor R1. At this time, the voltage inputted to the non-inverting input terminal of the operational amplifier U1 is smaller than the voltage inputted to the inverting input terminal of the operational amplifier U1, (vin+) < (VIN-), i.e., (vin+) - (VIN-) < 0. Next, the operational amplifier U1 amplifies the voltage across the first resistor R1, and calculates the difference between the reference voltage and the amplified voltage of the discharge voltage. The voltage output by the operational amplifier U1 is vout=vref+kx [ (vin+) - (VIN-) ] < VREF. VOUT at this time is a second voltage, which is smaller than the reference voltage VREF. The second voltage is input to the controller 33. When the reference voltages VREF, K and the resistance of the first resistor R1 are all determined, the controller 33 determines the charging voltage (i.e., [ (vin+) - (VIN-) ]) based on the second voltage, and further derives the magnitude of the charging current when the power supply 20 is charged based on ohm's law.

The differential operational amplifier of the type IN199A1 is taken as an operational amplifier U1 for further explanation. And takes the interval of the voltage received by the controller 33 as 0v,3v as an example. Meanwhile, the first resistor R1 has a resistance of 5mΩ, the reference voltage VREF is 1v, and k is 50.

Substituting the three parameters of the first voltage=3v, vref=1v, and k=50 into the formula (1) can obtain a discharge voltage of 0.04V, that is, a voltage across the first resistor R1 is 0.04V. A discharge current of 0.04/0.005=8a can be obtained based on ohm's law. The discharge current at this time is the maximum current that can be detected.

Substituting the three parameters of the second voltage=0v, vref=1v, and k=50 into equation (1) can obtain a charging voltage of 0.02V, that is, a voltage across the first resistor R1 is 0.02V. A discharge current of 0.02/0.005=4a can be obtained based on ohm's law. The discharge current at this time is the minimum current that can be detected.

In summary, the range of the detected current at this time is [4A,8A ]. Also, when it is necessary to increase the detection range of the current, this can be achieved by decreasing the resistance value of the first resistor R1 or decreasing the reference voltage VREF. For example, the reference voltage VREF is set to 0.75V, and the range of the detected current is calculated to be [3a,9a ] based on the same manner.

In addition, when the interface of the controller 33 receiving the first voltage or the second voltage is 12-bit resolution, the detectable voltage resolution can reach 2mV. Then, a minimum of 8mA is possible using the control circuit 30 in the embodiment of the present application. Thus, higher accuracy can be obtained when the detection current range is larger. In practical application, when the discharge current is set to 2A, the first voltage acquired by the controller 33 is 1.4996V. Substituting the first voltage= 1.4996V into equation (1) results in a current determined by the controller 33 of 1.998A. Therefore, the difference between the theoretical value and the actual value of the current detection is 2mA, and the detection precision is higher.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; the technical features of the above embodiments or in the different embodiments may also be combined under the idea of the present application, the steps may be implemented in any order, and there are many other variations of the different aspects of the present application as described above, which are not provided in details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A current detection circuit, comprising:

the power supply is used for supplying power to the control circuit;

the control circuit comprises a charge and discharge branch, an amplifying branch and a controller;

the charging and discharging branch circuit is electrically connected with the power supply, and is used for generating a charging voltage based on a charging current when the power supply is charged and generating a discharging voltage based on a discharging current when the power supply is discharged;

the amplifying branch is electrically connected with the charging and discharging branch and the controller respectively, and is used for amplifying the charging voltage and outputting a first voltage to the controller so that the controller can determine the charging current based on the first voltage, or is used for amplifying the discharging voltage and outputting a second voltage to the controller so that the controller can determine the discharging current based on the second voltage.

2. The current detection circuit of claim 1, wherein the charge-discharge branch comprises a first resistor, the first resistor being electrically connected to the power supply;

the first resistor is configured to generate the charging voltage across the first resistor when the charging current flows, and to generate the discharging voltage across the first resistor when the discharging current flows.

3. The current detection circuit of claim 2, wherein a first end of the first resistor is electrically connected to the power supply and a first input of the amplifying branch, respectively, and a second end of the first resistor is electrically connected to a second input of the amplifying branch.

4. The current detection circuit of claim 1, wherein the amplifying branch is further electrically connected to a reference voltage;

when the current flowing through the charge and discharge branch circuit is zero, the voltage output by the amplifying branch circuit is equal to the reference voltage.

5. The current detection circuit of claim 4, wherein the amplifying branch comprises an op-amp electrically connected to the charge-discharge branch, the controller, and the reference voltage, respectively;

the operational amplifier is configured to output the first voltage based on the reference voltage and the charging voltage, and to output the second voltage based on the reference voltage and the discharging voltage.

6. The current detection circuit of claim 5, wherein the op-amp is further configured to output the first voltage based on a difference between the reference voltage and the amplified voltage of the charging voltage and to output the second voltage based on a sum of the reference voltage and the amplified voltage of the discharging voltage.

7. The current detection circuit according to any one of claims 5 to 6, wherein the non-inverting input terminal of the op-amp is electrically connected to the power supply and the first terminal of the charge-discharge branch, the inverting input terminal of the op-amp is electrically connected to the second terminal of the charge-discharge branch, and the reference terminal of the op-amp is electrically connected to the reference voltage.

8. The current detection circuit of claim 7, wherein the amplifying branch further comprises a second resistor and a first capacitor;

the first end of the second resistor is electrically connected with the output end of the operational amplifier, the second end of the second resistor is electrically connected with the first end of the first capacitor and the controller respectively, and the second end of the first capacitor is grounded.

9. The current detection circuit of claim 7, wherein the amplifying branch further comprises a second capacitor;

the first end of the second capacitor is electrically connected with the power supply end of the operational amplifier, and the second end of the second capacitor is grounded.

10. An electronic atomizing device, comprising:

a nebulizer for nebulizing an aerosol-forming substrate to generate an aerosol;

and a current detection circuit as claimed in any one of claims 1 to 9.