Aerosol-generating device

Abstract

The utility model discloses an aerosol generating device. The aerosol generating device comprises a microwave generating assembly, a microwave feed-in assembly, a microwave heating assembly and a control assembly. The microwave generation assembly comprises a microwave signal source and a power amplifier circuit which are connected. The power amplifier circuit comprises a power supply module, a voltage input port and a power amplifier. The voltage input port is connected with the grid electrode of the power amplifier and used for providing first preset voltage for the grid electrode of the power amplifier. The power module is connected with the grid electrode and the drain electrode of the power amplifier, and after the first preset voltage is applied to the grid electrode of the power amplifier, the power module provides second preset voltage for the drain electrode of the power amplifier. Thus, through the design of the hardware circuit, the sequential logic of the power amplifier can be correct in the power-on process of the power amplifier circuit, the power amplifier is protected and is not prone to being damaged, and normal work of the power amplifier circuit is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit technology, and in particular to an aerosol generating device. Background Art

[0002] Power amplifiers are widely used in various microwave electronic products, such as microwave-heated aerosol generators. As the performance requirements for aerosol generators continue to increase, so too do the demands on power amplifiers. Power amplifiers amplify and enhance input signals, so improving the stability of power amplifier circuits has become a key concern. Currently, there is a risk of burnout during the power-up process. Utility Model Content

[0003] The embodiments of the present application provide an aerosol generating device to solve at least one of the above-mentioned technical problems.

[0004] An aerosol generating device according to an embodiment of the present application includes a microwave generating assembly, a microwave feeding assembly, a microwave heating assembly, and a control assembly. The microwave generating assembly is configured to generate a microwave signal and feed the microwave signal into the microwave heating assembly via the microwave feeding assembly to heat an aerosol generating substrate. The control assembly is configured to control the operating state of the microwave generating assembly. The microwave generating assembly includes a microwave signal source and a power amplifier circuit connected to each other. The power amplifier circuit includes a power supply module, a voltage input port, and a power amplifier.

[0005] The voltage input port is connected to the gate of the power amplifier, and is used to provide a first predetermined voltage to the gate of the power amplifier;

[0006] The power supply module is connected to both the gate and the drain of the power amplifier. When the first predetermined voltage is applied to the gate of the power amplifier, the power supply module provides a second predetermined voltage to the drain of the power amplifier.

[0007] In some embodiments, the power amplifier circuit further includes a signal input port, where the signal input port is connected to a gate of the power amplifier and is configured to provide an input signal to the gate of the power amplifier.

[0008] In some embodiments, the power amplifier circuit further includes a first conduction module and a second conduction module, wherein the first conduction module and the second conduction module are sequentially connected between the gate of the power amplifier and the power supply module, and are sequentially turned on after the first predetermined voltage is applied to the gate of the power amplifier.

[0009] In some embodiments, the first conduction module includes a diode, an anode of the diode is connected to the second conduction module, and a cathode of the diode is connected to the gate of the power amplifier.

[0010] In some embodiments, the second conduction module includes a transistor, a collector of the transistor is connected to the power module, an emitter of the transistor is connected to the first conduction module, and a base of the transistor is grounded.

[0011] In some embodiments, the power amplifier circuit further includes a third conduction module and a fourth conduction module, the third conduction module is arranged between the second conduction module and the power supply module, and the fourth conduction module is arranged between the power supply module and the drain of the power amplifier, and the third conduction module is used to provide a third predetermined voltage to the fourth conduction module after the second conduction module is turned on, so that the fourth conduction module is turned on.

[0012] In some embodiments, the third conduction module includes a first resistor and a second resistor, one end of the first resistor is connected to the power supply module, the other end of the first resistor is connected to one end of the second resistor and the fourth conduction module, and the other end of the second resistor is connected to the second conduction module.

[0013] In some embodiments, the fourth conduction module includes a transistor, a source of the transistor is connected to the power supply module, a drain of the transistor is connected to the drain of the power amplifier, and a gate of the transistor is connected to the third conduction module.

[0014] In some embodiments, the power amplifier circuit further includes an energy storage module, wherein the energy storage module is disposed between the voltage input port and the gate of the power amplifier;

[0015] The energy storage module includes a plurality of capacitors connected in parallel.

[0016] In some embodiments, the power amplifier circuit further includes a voltage divider module, wherein the voltage divider module is arranged between the voltage input port and the gate of the power amplifier; and / or

[0017] The power amplifier circuit further includes a filter module, which is arranged between the power supply module and the drain of the power amplifier.

[0018] In the aerosol generating device according to the embodiments of the present application, the voltage input port is used to provide a first predetermined voltage to the gate of the power amplifier. After the first predetermined voltage is applied to the gate of the power amplifier, the power module provides a second predetermined voltage to the drain of the power amplifier. This hardware circuit design ensures that the timing logic of the power amplifier is correct during the power-on process of the power amplifier circuit, protecting the power amplifier from damage and ensuring its normal operation.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. Among them:

[0021] Figure 1 is a schematic diagram of a module of an aerosol generating device according to certain embodiments of the present application;

[0022] Figure 2 is a circuit diagram of a power amplifier circuit in certain embodiments of the present application;

[0023] Figure 3 is a principle block diagram of a power amplifier circuit in certain embodiments of the present application;

[0024] Figure 4 It is a principle block diagram of a power amplifier circuit combining software and hardware in related technology.

[0025] Description of reference numerals:

[0026] Aerosol generating device 1000, microwave generating component 1001, microwave feeding component 1002, microwave heating component 1003, control component 1004;

[0027] Power amplifier circuit 100, microwave signal source 200;

[0028] Power supply module 10, voltage input port 20, signal input port 30, first conduction module 40, second conduction module 50, third conduction module 60, fourth conduction module 70, energy storage module 80, voltage divider module 90, filter module 91;

[0029] Power amplifier U, diode D, transistor Q1, transistor Q2, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, sixth resistor R6, first capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, fifth capacitor C5, sixth capacitor C6, seventh capacitor C7, and eighth capacitor C8. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0031] See also Figures 1 to 3 An embodiment of the present application provides an aerosol generating device 1000. The aerosol generating device 1000 includes a microwave generating assembly 1001, a microwave feeding assembly 1002, a microwave heating assembly 1003, and a control assembly 1004. The microwave generating assembly 1001 is used to generate a microwave signal and feed the microwave signal into the microwave heating assembly 1003 via the microwave feeding assembly 1002 to heat the aerosol generating substrate. The control assembly 1004 is used to control the operating state of the microwave generating assembly 1001. The microwave generating assembly 1001 includes a microwave signal source 200 and a power amplifier circuit 100 connected to each other. The power amplifier circuit 100 includes a power module 10, a voltage input port 20, and a power amplifier U. The voltage input port 20 is connected to the gate of the power amplifier U and is used to provide a first predetermined voltage to the gate of the power amplifier U. The power module 10 is connected to both the gate and drain of the power amplifier U. When the first predetermined voltage is applied to the gate of the power amplifier U, the power module 10 provides a second predetermined voltage to the drain of the power amplifier U.

[0032] In the aerosol generating device 1000 according to the embodiment of the present application, the voltage input port 20 is used to provide a first predetermined voltage to the gate of the power amplifier U. After the first predetermined voltage is applied to the gate of the power amplifier U, the power module 10 provides a second predetermined voltage to the drain of the power amplifier U. In this way, through hardware circuit design, the timing logic of the power amplifier U can be correct during the power-on process of the power amplifier circuit 100, thereby protecting the power amplifier U from damage and ensuring normal operation of the power amplifier circuit 100.

[0033] In some embodiments, the power amplifier circuit 100 further includes a signal input port 30. The signal input port 30 is connected to the gate of the power amplifier U and is used to provide an input signal to the gate of the power amplifier U.

[0034] Specifically, the gate of the power amplifier U is connected to the power module 10, the voltage input port 20, and the signal input port 30, respectively. The microwave signal output by the microwave signal source 200 can be input into the power amplifier U via the signal input port 30. The drain of the power amplifier U is connected to the power module 10 and serves as a signal output terminal, outputting the microwave signal to the microwave feed assembly 1002. The source of the power amplifier U is grounded. The power amplifier U can be a microwave power amplifier, which is used to amplify power within the microwave frequency band to output a high signal power from the signal output terminal. The control assembly 1004 can be used to determine the current state of the aerosol generating device 1000 and output a state control signal to control the operating state of the microwave generating assembly 1001. This state control signal may include an operating control signal and a standby control signal. When the aerosol generating device 1000 is heating the aerosol-forming substrate, the control assembly 1004 outputs the operating control signal; when in a non-heating state or an abnormal state, the control assembly 1004 outputs the standby control signal. In addition to the working control signal and the standby control signal, the status control signal also includes an abnormality control signal. In this way, the power supply to the power amplifier U can be cut off when the device is in standby or an abnormality occurs, and the power supply to the power amplifier U is maintained only when the device is operating normally (during the user's puffing time).

[0035] Power amplifier U can be made of gallium nitride. Gallium nitride semiconductors feature a wide bandgap, high energy density, and high efficiency, making it easy to design power amplifiers U that are smaller, more efficient, and have stronger signals. Compared to power amplifiers U made of other materials, gallium nitride-based power amplifiers U lack a body diode, effectively turning them on when no gate voltage is applied.

[0036] The voltage input port 20 is used to provide a first predetermined voltage to the gate of the power amplifier U when powered on. The voltage value of the first predetermined voltage is usually determined according to the gate conduction voltage of the power amplifier U. After the power amplifier U is connected to the first predetermined voltage, it changes from the on state to the off state.

[0037] The signal input port 30 is used to provide an input signal to the gate of the power amplifier U. The power amplifier U amplifies or enhances the input signal.

[0038] After the first predetermined voltage is applied to the gate of the power amplifier U, the power module 10 provides a second predetermined voltage to the drain of the power amplifier U. In one example, the operating voltage of the power module 10 is 28V.

[0039] In the related art, since the power amplifier is in a directly on state when no gate voltage is applied, if the signal input port provides an input signal to the gate of the power amplifier, the power amplifier will be directly turned on, causing damage to the power amplifier.

[0040] In the embodiment of the present application, the voltage input port 20 is used to provide a first predetermined voltage to the gate of the power amplifier U. Under the action of the first predetermined voltage, the power amplifier U changes from an on state to an off state. At this time, the signal input port 30 provides an input signal to the gate of the power amplifier U, so that the power amplifier U is protected and the power amplifier U is not easily burned out.

[0041] In the related art, during the power-on process of the power amplifier circuit, if the timing logic of the power amplifier is incorrect or the response is not timely, the power amplifier will be directly turned on, which will cause the power amplifier to burn out.

[0042] In the embodiment of the present application, after the voltage input port 20 provides a first predetermined voltage to the gate of the power amplifier U, the power supply module 10 provides a second predetermined voltage to the drain of the power amplifier U, so that the timing logic of the power amplifier U is correct during the power-on process, that is, it is ensured that the power amplifier U has a gate voltage first and then a drain voltage during the power-on process, thereby protecting the power amplifier U and preventing it from being burned out.

[0043] In related technologies, most power amplifier circuits use a combination of software and hardware to protect the power amplifier. Figure 4 As shown in the figure, the principle of a commonly used hardware-software integrated power amplifier circuit is to first read the ID current value between the power module and the power amplifier, perform A / D conversion, and feed the AD value back to the microcontroller unit (MCU). The microcontroller comparison storage unit in the MCU determines whether the ID current is normal (the ID current can also be replaced by the VD voltage). If the result is normal, the voltage value is called and sent to the power amplifier's gate. At this time, the power module also provides the power amplifier with a drain voltage. If the result is abnormal, the power amplifier's drain voltage is directly shut down or disconnected. The entire process first requires hardware circuitry to collect data, sample, and perform A / D conversion, then software reading and writing, program response, and finally issuing protection instructions. This series of steps results in long software response time and untimely response. There is a possibility that during power on and off, software protection has not yet been triggered and the power amplifier has already been damaged.

[0044] Therefore, using a combination of software and hardware protection carries the risk of damaging the power amplifier. Furthermore, other hardware sampling protection methods often suffer from large circuit size, bulky equipment, low product portability, high cost, and limited versatility. These issues are detrimental to the trend toward miniaturization and universal application of products.

[0045] In the embodiments of the present application, through purely hardware circuit improvements, software restrictions are eliminated. After the voltage input port 20 provides a first predetermined voltage to the gate of the power amplifier U, the power module 10 provides a second predetermined voltage to the drain of the power amplifier U. This ensures that the timing logic of the power amplifier U is correct during the power-on process, thereby achieving automatic protection of the power amplifier U during the power-on process. This approach is highly versatile and reliable, and can be applied to different types of power amplifier circuits 100, thereby improving the versatility and universality of the power amplifier circuit 100. Furthermore, the circuit has a simple structure, small size, low cost, and high versatility, and is also applicable to different models of power amplifiers U. This also meets the development trend of aerosol generating devices 1000 that are small in size, highly versatile, and highly reliable.

[0046] See also Figure 2 and Figure 3 In some embodiments, the power amplifier circuit 100 further includes a first conduction module 40 and a second conduction module 50. The first conduction module 40 and the second conduction module 50 are sequentially connected between the gate of the power amplifier U and the power supply module 10, and are sequentially turned on after the first predetermined voltage is applied to the gate of the power amplifier U.

[0047] The power amplifier circuit 100 may further include a third resistor R3. The first conduction module 40 is connected to the gate of the power amplifier U via the third resistor R3. In the series circuit, the third resistor R3 can share some of the voltage, making the current in the power amplifier circuit 100 more stable. The second conduction module 50 is located between the first conduction module 40 and the power module 10. After the voltage input port 20 provides the first predetermined voltage to the gate of the power amplifier U, the first conduction module 40 is turned on, thereby turning on the second conduction module 50.

[0048] See also Figure 2 and Figure 3 In some embodiments, the first conduction module 40 includes a diode D. The anode of the diode D is connected to the second conduction module 50, and the cathode of the diode D is connected to the gate of the power amplifier U.

[0049] Specifically, the cathode of the diode D is connected to the gate of the power amplifier U through the third resistor R3, and at the same time, is also connected to the voltage input port 20 through the third resistor R3. When the voltage input port 20 provides the first predetermined voltage to the gate of the power amplifier U, the diode D is turned on. The first conduction module 40 may also include a first capacitor C1 and a second capacitor C2. One end of the first capacitor C1 is connected to the positive electrode of the diode D, and the other end of the first capacitor C1 is grounded. One end of the second capacitor C2 is grounded, and the other end of the second capacitor C2 is connected to the negative electrode of the diode D. The first capacitor C1 can play an energy storage role to maintain stable operation of the circuit. The second capacitor C2 can play a filtering role, so that the output voltage becomes smooth and stable, reduces the AC ripple component, and improves the quality of the output voltage.

[0050] See also Figure 2 and Figure 3 In some embodiments, the second conduction module 50 includes a transistor Q1 . The collector of the transistor Q1 is connected to the power module 10 , the emitter of the transistor Q1 is connected to the first conduction module 40 , and the base of the transistor Q1 is grounded.

[0051] Specifically, the emitter of transistor Q1 is connected to the anode of diode D. After diode D is turned on, it can provide the voltage required for conduction to the emitter of transistor Q1, causing transistor Q1 to turn on. In one example, transistor Q1 can be an NPN transistor. The second conduction module 60 can also include a fourth resistor R4. The base of transistor Q1 is grounded through the fourth resistor R4. The fourth resistor R4 can play a certain current limiting role and stabilize the static operating point of transistor Q1.

[0052] See also Figure 2 and Figure 3 In some embodiments, the power amplifier circuit 100 further includes a third conduction module 60 and a fourth conduction module 70. The third conduction module 60 is disposed between the second conduction module 50 and the power module 10, and the fourth conduction module 70 is disposed between the power module 10 and the drain of the power amplifier U. The third conduction module 60 is configured to provide a third predetermined voltage to the fourth conduction module 70 after the second conduction module 50 is turned on, so as to turn on the fourth conduction module 70.

[0053] Specifically, the power module 10 is located between the third conduction module 60 and the fourth conduction module 70. After the third conduction module 60 is turned on, a third predetermined voltage can be provided to the fourth conduction module 70 to turn on the fourth conduction module 70. After the first conduction module 40, the second conduction module 50, the third conduction module 60, and the fourth conduction module 70 are sequentially turned on, the power module 10 provides the second predetermined voltage to the drain of the power amplifier U, and the power amplifier U begins to operate normally. At this time, the drain voltage is applied to the power amplifier U after the gate voltage is applied, which meets the timing logic of the power amplifier U during power-up and can avoid the risk of burning out the power amplifier U.

[0054] See also Figure 2 and Figure 3 In some embodiments, the third conduction module 60 includes a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to the power module 10, and the other end of the first resistor R1 is connected to one end of the second resistor R2 and the fourth conduction module 70. The other end of the second resistor R2 is connected to the second conduction module 50.

[0055] Specifically, the power module 10 provides a voltage at one end of the first resistor R1, and the second conduction module 50 provides a voltage at the other end of the second resistor R2 after the conduction module 50 is turned on. The other end of the first resistor R1 and one end of the second resistor R2 are connected to the fourth conduction module 70 to provide a third predetermined voltage to the fourth conduction module 70, thereby turning on the fourth conduction module 70. The resistance values of the first resistor R1 and the second resistor R2 can be appropriately selected based on the conduction condition of the fourth conduction module 70 so that the third predetermined voltage provided to the fourth conduction module 70 satisfies the conduction condition of the fourth conduction module 70.

[0056] See also Figure 2 and Figure 3 In some embodiments, the fourth conduction module 70 includes a transistor Q2, the source of the transistor Q2 is connected to the power module 10, the drain of the transistor Q2 is connected to the drain of the power amplifier U, and the gate of the transistor Q2 is connected to the third conduction module 60.

[0057] Specifically, the third predetermined voltage provided by the third conduction module 60 to the fourth conduction module 70 is applied to the gate of transistor Q2. When the third predetermined voltage is greater than the gate conduction voltage of transistor Q2, transistor Q2 is turned on. After transistor Q2 is turned on, current flows from the source to the drain of transistor Q2, and the power supply module 10 provides the second predetermined voltage to the drain of power amplifier U.

[0058] Transistor Q2 can be a high-power field effect transistor (FET). In the embodiment of the present application, transistor Q2 is a PMOS tube. When the third predetermined voltage is not applied to the gate of transistor Q2, transistor Q2 is in the cut-off state; when the third predetermined voltage is applied to the gate of transistor Q2, transistor Q2 is in the on state. Transistor Q2 also has a body diode, the positive pole of the body diode corresponds to the drain, and the negative pole corresponds to the source. When the third predetermined voltage is not applied, the presence of the body diode of transistor Q2 can prevent the voltage of the power module 10 from damaging transistor Q2. When the third predetermined voltage is applied, transistor Q2 is in the on state, and the current of the power module 10 can flow from the source to the drain of transistor Q2, at which time the body diode is in the on state.

[0059] See also Figure 2 and Figure 3 In some embodiments, the power amplifier circuit 100 further includes an energy storage module 80. The energy storage module 80 is disposed between the voltage input port 20 and the gate of the power amplifier U. The energy storage module 80 includes a plurality of capacitors connected in parallel.

[0060] Specifically, Figure 2 For example, the energy storage module 80 may include a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5, with the three capacitors arranged in parallel. One end of the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 is connected between the voltage input port 20 and the gate of the power amplifier U, and the other end is grounded. Of course, in other examples, the energy storage module 80 may also include more capacitors arranged in parallel, which is not limited here. The energy storage module 80 can play a role in filtering and energy storage.

[0061] It can be understood that during the power-off process of the power amplifier circuit 100 , the timing logic of the power amplifier U must be ensured, that is, the drain voltage of the power amplifier U must drop before the gate voltage, thereby protecting the power amplifier U.

[0062] When the power amplifier circuit 100 is powered off, the voltage input port 20 stops providing the first predetermined voltage to the gate of the power amplifier U. Since the drain of the power amplifier U serves as a signal output terminal and has high drain energy consumption, the drain voltage will be quickly pulled to a lower value, so the drain voltage is powered off quickly. The gate voltage of the power amplifier U is small and has low energy consumption. By utilizing the energy storage characteristics of the capacitor in the energy storage module 80, the capacitor discharge is utilized to provide voltage to the gate of the power amplifier U, so that the gate voltage drops more slowly than the drain voltage. The capacitor value can be set to an appropriate value based on the order in which the gate and drain of the power amplifier U are powered off, to ensure that the drain voltage drops first and the gate voltage drops later during the power-off process of the power amplifier U. In this way, the timing logic of the power amplifier U during the power-off process can be correct, protecting the power amplifier U from damage during the power-off process.

[0063] It should be noted that during the power-off process, the signal input port 30 may continue to provide an input signal to the gate of the power amplifier U, or may stop providing an input signal to the gate of the power amplifier U. The power of the input signal provided by the signal input port 30 is typically very low, approximately 0.5 W. During the power-off process, the power amplifier U cannot function normally. At this time, if the signal input port 30 still provides an input signal at the gate, the impact on the power amplifier U can be ignored.

[0064] In the embodiment of the present application, during the power-off process, the voltage input port 20 stops providing the first predetermined voltage to the gate of the power amplifier U, and the energy storage module 80 discharges to continue providing voltage to the power amplifier U, so that the gate voltage of the power amplifier U decreases more slowly than the drain voltage. In this way, the correct timing logic of the power-off of the power amplifier U can be ensured.

[0065] See also Figure 2 and Figure 3 In some embodiments, the power amplifier circuit 100 further includes a voltage divider module 90, which is disposed between the voltage input port 20 and the gate of the power amplifier U. And / or, the power amplifier circuit 100 further includes a filter module 91, which is disposed between the power module 10 and the drain of the power amplifier U.

[0066] Specifically, the voltage divider module 90 may include a fifth resistor R5 and a sixth resistor R6, which are arranged in parallel. One end of the fifth resistor R5 and the sixth resistor R6 is connected to the voltage input port 20, and the other end is connected to the gate of the power amplifier U. The voltage divider module 90 is arranged between the voltage input port 20 and the gate of the power amplifier U to limit the current to a certain extent, protecting the power amplifier U from damage caused by high current, and also ensuring that the current in the power amplifier circuit 100 meets the conditions for the gate of the power amplifier U to be turned on.

[0067] The filter module 91 may include a sixth capacitor C6, a seventh capacitor C7, and an eighth capacitor C8, with the three capacitors being arranged in parallel. The filter module 91 may specifically be arranged between the fourth conduction module 70 and the drain of the power amplifier U. One end of the sixth capacitor C6, the seventh capacitor C7, and the eighth capacitor C8 is connected between the drain of the transistor Q2 of the fourth conduction module 70 and the drain of the power amplifier U, and the other end is grounded. By charging and discharging the capacitors, the fluctuation of the output voltage can be reduced, thereby achieving a filtering effect. Capacitor filtering can also provide a relatively stable DC voltage, ensuring the normal operation of the power amplifier circuit 100.

[0068] In summary, in the aerosol generating device 1000 of the embodiment of the present application, during the power-up process, after the voltage input port 20 provides a first predetermined voltage to the gate of the power amplifier U, the power module 10 provides a second predetermined voltage to the drain of the power amplifier U. This ensures that the timing logic of the power amplifier U during the power-up process is correct, that is, the timing logic of the power amplifier U first having a gate voltage and then a drain voltage is ensured during the power-up process. During the power-down process, the energy storage module 80 ensures that the drain of the power amplifier U is powered down before the gate of the power amplifier U, ensuring that the timing logic of the power amplifier U during the power-down process is correct. Through hardware circuit design, the embodiment of the present application ensures that the timing logic of the power amplifier U is correct during the operation or power-up and power-down processes of the power amplifier circuit 100, thereby protecting the power amplifier U from damage and ensuring the normal operation of the power amplifier circuit 100. At the same time, because the power amplifier circuit 100 adopts a purely hardware circuit improvement approach, the power amplifier circuit 100 has the characteristics of strong logical reliability, low cost, strong circuit versatility, small size, and low risk of power amplifier burnout. Therefore, the power amplifier circuit 100 can also adapt to the development trend of the aerosol generating device 1000 having small size, high versatility and high reliability.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0070] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. A person of ordinary skill in the art will be able to understand the specific meanings of the above terms in this application based on the specific circumstances.

[0071] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0072] The disclosure above provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0073] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," and "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] Although the embodiments of the present application have been shown and described above, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An aerosol generating device, characterized in that The device comprises a microwave generating assembly, a microwave feeding assembly, a microwave heating assembly and a control assembly. The microwave generating assembly is used to generate a microwave signal and feed the microwave signal into the microwave heating assembly through the microwave feeding assembly to heat the aerosol generating substrate. The control assembly is used to control the working state of the microwave generating assembly. The microwave generating assembly includes a connected microwave signal source and a power amplifier circuit. The power amplifier circuit includes a power module, a voltage input port and a power amplifier. The voltage input port is connected to the gate of the power amplifier, and is used to provide a first predetermined voltage to the gate of the power amplifier; The power supply module is connected to both the gate and the drain of the power amplifier. When the first predetermined voltage is applied to the gate of the power amplifier, the power supply module provides a second predetermined voltage to the drain of the power amplifier.

2. The aerosol generating device according to claim 1, wherein The power amplifier circuit further includes a signal input port, which is connected to the gate of the power amplifier and is used to provide an input signal to the gate of the power amplifier.

3. The aerosol generating device according to claim 1, wherein The power amplifier circuit also includes a first conduction module and a second conduction module, which are sequentially connected between the gate of the power amplifier and the power supply module, and are sequentially turned on after the first predetermined voltage is applied to the gate of the power amplifier.

4. The aerosol generating device according to claim 3, wherein: The first conducting module includes a diode, an anode of the diode is connected to the second conducting module, and a cathode of the diode is connected to the gate of the power amplifier.

5. The aerosol generating device according to claim 3, wherein: The second conduction module includes a transistor, a collector of the transistor is connected to the power module, an emitter of the transistor is connected to the first conduction module, and a base of the transistor is grounded.

6. The aerosol generating device according to claim 3, wherein: The power amplifier circuit also includes a third conduction module and a fourth conduction module. The third conduction module is arranged between the second conduction module and the power supply module, and the fourth conduction module is arranged between the power supply module and the drain of the power amplifier. The third conduction module is used to provide a third predetermined voltage to the fourth conduction module after the second conduction module is turned on, so that the fourth conduction module is turned on.

7. The aerosol generating device according to claim 6, wherein: The third conduction module includes a first resistor and a second resistor, one end of the first resistor is connected to the power module, the other end of the first resistor is connected to one end of the second resistor and the fourth conduction module, and the other end of the second resistor is connected to the second conduction module.

8. The aerosol generating device according to claim 6, wherein: The fourth conduction module includes a transistor, a source of the transistor is connected to the power supply module, a drain of the transistor is connected to the drain of the power amplifier, and a gate of the transistor is connected to the third conduction module.

9. The aerosol generating device according to claim 1, wherein: The power amplifier circuit further includes an energy storage module, which is arranged between the voltage input port and the gate of the power amplifier; The energy storage module includes a plurality of capacitors connected in parallel.

10. The aerosol generating device according to claim 1, wherein The power amplifier circuit further includes a voltage dividing module, wherein the voltage dividing module is arranged between the voltage input port and the gate of the power amplifier; and / or The power amplifier circuit further includes a filter module, which is arranged between the power supply module and the drain of the power amplifier.

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