Ultrasonic atomizer full-wave drive circuit and ultrasonic electronic cigarette

Abstract

The present invention discloses a full-wave driving circuit of an ultrasonic atomizer sheet and an ultrasonic electronic cigarette, including a power module, a microprocessor, a high-frequency square wave generating circuit, an NMOS tube and a resonant circuit; the power module includes a battery and a boost module; the output end of the battery is electrically connected to the resonant circuit through the boost module; the output end of the microprocessor is electrically connected to the gate of the NMOS tube through the high-frequency square wave generating circuit, the source of the NMOS tube is grounded, the resonant circuit includes a first inductor, a second inductor and a first capacitor, the output end of the boost module is electrically connected to the positive electrode of the ultrasonic atomizer sheet through the first inductor and the second inductor in turn, the negative electrode of the ultrasonic atomizer sheet is grounded, the first capacitor is connected between the positive electrode of the ultrasonic atomizer sheet and the ground, and the drain of the NMOS tube is connected between the first inductor and the second inductor. The present invention has low requirements for the boost module, low loss of the boost module, and high power conversion efficiency; small size, low loss of the NMOS tube, low cost, easy debugging, high reliability, and good atomization effect.

Description

Technical Field

[0001] The present invention particularly relates to an ultrasonic atomizer full-wave driving circuit and an ultrasonic electronic cigarette. Background Art

[0002] The ultrasonic atomizer drive circuit is divided into two types: half-wave drive circuit and full-wave drive circuit.

[0003] like Figure 1 As shown, the existing ultrasonic atomizer half-wave driving circuit includes a power module 1, a microprocessor 2, a high-frequency square wave generating circuit 3, an NMOS tube Q1, a resonant circuit 4, and a current collection circuit 5; wherein the power module 1 includes a battery 101 and a boost module 102; the high-frequency square wave generating circuit 3 includes a resistor R3, a square wave amplifier U1, and a capacitor C2; the resonant circuit 4 includes an inductor L1 and an ultrasonic atomizer W; the current collection circuit 5 includes a resistor R4, a resistor R5, and a capacitor C3; the output end of the microprocessor 2 is electrically connected to the input end of the square wave amplifier U1, the resistor R3 is connected between the input end of the square wave amplifier U1 and the ground, and the square wave The output end of the amplifier U1 is electrically connected to the gate of the NMOS tube Q1 through the resistor R1, and the capacitor C2 is connected between the power supply end of the square wave amplifier U1 and the ground; the gate of the NMOS tube Q1 is also grounded through the resistor R2, the drain of the NMOS tube Q1 is electrically connected to the first end of the inductor L1, the battery 101 is electrically connected to the second end of the inductor L1 through the boost module 102, and the ultrasonic atomizer W is connected between the first end of the inductor L1 and the ground; the source of the NMOS tube Q1 is grounded through the resistor R5, and the source of the NMOS tube Q1 is also grounded through the resistor R4 and the capacitor C3 in turn; the input end of the microprocessor 2 is connected between the resistor R4 and the capacitor C3. A capacitor C1 is also connected between the ultrasonic atomizer W and the first end of the inductor L1 to reduce or eliminate the interference of the parasitic capacitance in the ultrasonic atomizer W, and the first end of the inductor L1 is grounded through the voltage regulator diode D1.

[0004] Figure 1 The working principle of the ultrasonic atomizer half-wave driving circuit shown in is as follows: the microprocessor 2 outputs a PWM wave to the high-frequency square wave generating circuit 3, which controls the continuous switching of the NMOS tube Q1, and then controls the continuous charging and discharging of the inductor L1 in the resonant circuit 4, and finally realizes the half-wave oscillation of the ultrasonic atomizer W. During the oscillation process, the current collection circuit 5 collects the working current and sends it to the microprocessor 2, so that the microprocessor 2 adjusts the frequency of the output PWM wave according to the size of the working current, and finally realizes the power regulation of the ultrasonic atomizer W.

[0005] Figure 1 The disadvantages of the ultrasonic atomizer half-wave drive circuit shown in are:

[0006] Since the effective driving time is only about 50% in the driving cycle of the half-wave driving method, the driving efficiency is low. In order to improve the atomization power of the ultrasonic atomizer, the boost module must be able to provide a higher and more stable driving voltage (VCC). Therefore, the requirements for the boost module are high, the boost module has large losses, and the power conversion efficiency is low.

[0007] like Figure 2 As shown, the existing full-wave driving circuit of ultrasonic atomizer includes a power module 1, a microprocessor 2, an NMOS tube Q1, and an NMOS tube Q2; wherein the first output terminal of the microprocessor 2 is electrically connected to the gate of the NMOS tube Q1 through a resistor R1, the gate of the NMOS tube Q1 is grounded through a resistor R3, the source of the NMOS tube Q1 is grounded through a resistor R6, the drain of the NMOS tube Q1 is electrically connected to the first end of the inductor L1, and the first end of the inductor L1 is grounded through a voltage-stabilizing diode D1; the second output terminal of the microprocessor 2 The gate of the NMOS tube Q2 is electrically connected to the resistor R2, the gate of the NMOS tube Q2 is grounded through the resistor R4, the source of the NMOS tube Q2 is grounded through the resistor R5, the drain of the NMOS tube Q2 is electrically connected to the first end of the inductor L2, and the first end of the inductor L2 is grounded through the voltage-stabilizing diode D2; the first end of the inductor L1 is electrically connected to one pole of the ultrasonic atomization sheet W, and the first end of the inductor L2 is electrically connected to the other pole of the ultrasonic atomization sheet W; the second end of the inductor L1 and the second end of the inductor L2 are both electrically connected to the output end of the power module 1.

[0008] Figure 2 The working principle of the ultrasonic atomizer full-wave driving circuit shown in is: the microprocessor 2 outputs a PWM wave (PWM_OUT1) to control the continuous switching of the NMOS tube Q1, thereby controlling the continuous charging and discharging of the inductor L1, and finally realizing the positive half-wave oscillation of the ultrasonic atomizer W; the microprocessor 2 outputs another PWM wave (PWM_OUT2 complementary to PWM_OUT1) to control the continuous switching of the NMOS tube Q2, thereby controlling the continuous charging and discharging of the inductor L2, and finally realizing the negative half-wave oscillation of the ultrasonic atomizer W.

[0009] Figure 2 The disadvantages of the ultrasonic atomizer full-wave drive circuit shown in are:

[0010] First, two power MOS tubes (Q1 and Q2) are required, but MOS tubes are large in size and have large losses, which increases the production and use costs.

[0011] Second, two half-wave drive circuits are required to work in a complementary manner, that is, the microprocessor needs to output two drive signals "PWM_OUT1" and "PWM_OUT2" to drive. If the duty cycles of these two signals are not well matched, the positive half-wave and the negative half-wave may not be connected (such as overlapping or lagging, etc.). Therefore, the driver debugging is very troublesome and the reliability is not high. Summary of the invention

[0012] Among the two existing ultrasonic atomizer drive circuits, the half-wave drive circuit has higher requirements for the boost module, the boost module has large losses, and the power conversion efficiency is low; the full-wave drive circuit requires two power MOS tubes, which are large in size and have large losses. At the same time, the full-wave drive circuit is troublesome to debug and has low reliability. The purpose of the present invention is to provide an improved ultrasonic atomizer full-wave drive circuit and ultrasonic electronic cigarette in view of the deficiencies of the two drive circuits in the prior art. Compared with the existing ultrasonic atomizer half-wave drive circuit, it has low requirements for the boost module, reduces the loss of the boost module, and increases the power conversion efficiency; compared with the existing ultrasonic atomizer full-wave drive circuit, only one power MOS tube is used, which reduces the size, reduces the loss and cost, and only one PWM drive signal is used, which is easy to debug, and the output waveform is a complete and continuous sine wave signal, and there will be no connection problems such as waveform overlap or lag, and the reliability is higher.

[0013] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0014] A full-wave driving circuit for an ultrasonic atomizer comprises a power module, a microprocessor, a high-frequency square wave generating circuit, an NMOS tube and a resonant circuit; the power module comprises a battery and a boost module; the output end of the battery is electrically connected to the resonant circuit through the boost module; the output end of the microprocessor is electrically connected to the gate of the NMOS tube through the high-frequency square wave generating circuit, and the source of the NMOS tube is grounded. The structural feature is that the resonant circuit comprises a first inductor, a second inductor and a first capacitor, the output end of the boost module is electrically connected to the positive electrode of the ultrasonic atomizer through the first inductor and the second inductor in turn, the negative electrode of the ultrasonic atomizer is grounded, the first capacitor is connected between the positive electrode of the ultrasonic atomizer and the ground, and the drain of the NMOS tube is connected between the first inductor and the second inductor.

[0015] With the above structure, the microprocessor outputs a PWM wave which is amplified by the high-frequency square wave generating circuit, and then controls the continuous switching of the NMOS tube, utilizes a power MOS tube, two power inductors (the first inductor and the second inductor) and the first capacitor, and converts the boosted voltage of the battery into a complete high-frequency sine wave to realize the full-wave oscillation of the ultrasonic atomizer.

[0016] Compared with the half-wave driving circuit of the ultrasonic atomizer in the prior art, the present invention is a full-wave oscillation, so the effective driving time in the driving cycle is 100%, which is much greater than the 50% of the half-wave driving method in the prior art. The driving efficiency is high, and the atomization power of the ultrasonic atomizer is large. Therefore, under the same power conditions, the output voltage of the boost module can be reduced, the requirements for the boost module are low, the loss of the boost module is reduced, and the power conversion efficiency is increased.

[0017] Compared with the full-wave driving circuit of the ultrasonic atomizer in the prior art, the present invention uses one less power MOS tube and only needs one power MOS tube, which reduces the volume, loss and cost, and only needs one PWM driving signal, which is easy to debug. The output waveform is a complete and continuous sinusoidal wave signal, and there will be no connection problems such as waveform overlap or lag. The reliability is higher and the atomization effect is better.

[0018] Furthermore, the resonant circuit also includes a second capacitor, which is connected in series with a second inductor between the drain of the NMOS tube and the positive electrode of the ultrasonic atomization sheet.

[0019] The capacitance value of the second capacitor is relatively small, and is mainly used to reduce or eliminate the interference effect of the parasitic capacitance in the ultrasonic atomizer sheet to achieve a better resonance effect.

[0020] Furthermore, the resonant circuit also includes a transient diode, which is connected between the positive electrode of the ultrasonic atomization sheet and the ground.

[0021] Transient diodes are used to protect the ultrasonic atomizer from overvoltage.

[0022] Furthermore, it also includes a first resistor and a second resistor. The output end of the high-frequency square wave generating circuit is electrically connected to the gate of the NMOS tube through the first resistor, and the second resistor is connected between the gate of the NMOS tube and the ground.

[0023] Furthermore, a third capacitor is included, one end of the third capacitor is connected between the first resistor and the second resistor, and the other end of the third capacitor is electrically connected to the gate of the NMOS tube.

[0024] The third capacitor is a coupling capacitor, which is used to filter out the noise at the front end of the NMOS tube gate.

[0025] As a preferred embodiment, the high-frequency square wave generating circuit includes a third resistor, a fourth capacitor and a square wave amplifier, the output end of the microprocessor is electrically connected to the input end of the square wave amplifier, the third resistor is connected between the output end of the microprocessor and the ground, the power supply end of the square wave amplifier is grounded through the fourth capacitor, and the output end of the square wave amplifier is the output end of the high-frequency square wave generating circuit.

[0026] The square wave amplifier is used to amplify the PWM wave signal output by the microprocessor and control the continuous switching of the NMOS tube.

[0027] Furthermore, it also includes a current collection circuit for collecting the working current between the source of the NMOS tube and the ground, and the output end of the current collection circuit is electrically connected to the input end of the microprocessor.

[0028] The current acquisition circuit is used to collect the working current and send it to the microprocessor so that the microprocessor can adjust the frequency of the output PWM wave according to the working current, and finally realize the power regulation of the ultrasonic atomizer, so that the power output of the ultrasonic atomizer is stable and efficient.

[0029] As a preferred embodiment, the current acquisition circuit includes a fourth resistor, a fifth resistor, and a fifth capacitor. The fifth resistor is connected between the source of the NMOS tube and the ground. The source of the NMOS tube is connected to the ground through the fourth resistor and the fifth capacitor in sequence. The input end of the microprocessor is connected between the fourth resistor and the fifth capacitor.

[0030] As a preferred embodiment, the battery is a rechargeable battery.

[0031] Based on the same inventive concept, the present invention also provides an ultrasonic electronic cigarette, which is characterized by comprising the ultrasonic atomizer full-wave driving circuit.

[0032] Compared with the prior art, the present invention overcomes the shortcomings of both the ultrasonic atomizer half-wave drive circuit and the ultrasonic atomizer full-wave drive circuit in the prior art, combines the advantages of both the ultrasonic atomizer half-wave drive circuit and the ultrasonic atomizer full-wave drive circuit, and has the following beneficial effects:

[0033] First, compared with the half-wave driving circuit of the ultrasonic atomizer in the prior art, the present invention is a full-wave oscillation, so the effective driving time within the driving cycle is 100%, which is much greater than the 50% of the half-wave driving method in the prior art. The driving efficiency is high, and the atomization power of the ultrasonic atomizer is large. Therefore, under the same power conditions, the output voltage of the boost module can be reduced, the requirements for the boost module are low, the loss of the boost module is reduced, and the power conversion efficiency is increased.

[0034] Second, compared with the full-wave driving circuit of the ultrasonic atomizer in the prior art, the present invention uses one less power MOS tube and only needs one power MOS tube, which reduces the volume, loss and cost, and only needs one PWM driving signal, which is easy to debug. The output waveform is a complete and continuous sinusoidal wave signal, and there will be no connection problems such as waveform overlap or lag. The reliability is higher and the atomization effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1The figure is a simplified structural diagram of a half-wave driving circuit of an ultrasonic atomizer in the prior art.

[0036] Figure 2 The figure is a simplified structural diagram of a full-wave driving circuit of an ultrasonic atomizer in the prior art.

[0037] Figure 3 The circuit block diagram of the full-wave driving circuit of the ultrasonic atomizer of the present invention.

[0038] Figure 4 for Figure 3 A simplified circuit diagram.

[0039] Figure 3 and Figure 4 In the figure, 1 is a power module, 101 is a battery, 102 is a boost module, 2 is a microprocessor, 3 is a high-frequency square wave generating circuit, 4 is a resonant circuit, 5 is a current acquisition circuit, U1 is a square wave amplifier, L1 is a first inductor, L2 is a second inductor, C1 is a first capacitor, C2 is a second capacitor, C3 is a third capacitor, C4 is a fourth capacitor, C5 is a fifth capacitor, R1 is a first resistor, R2 is a second resistor, R3 is a third resistor, R4 is a fourth resistor, R5 is a fifth resistor, Q1 is an NMOS tube, TVS1 is a transient diode, and W is an ultrasonic atomizer. DETAILED DESCRIPTION

[0040] like Figure 3 and Figure 4 As shown, the full-wave driving circuit of the ultrasonic atomizer in the ultrasonic electronic cigarette includes a power module 1, a microprocessor 2, a high-frequency square wave generating circuit 3, an NMOS tube Q1 and a resonant circuit 4; the power module 1 includes a battery 101 and a boost module 102; the output end of the battery 101 is electrically connected to the resonant circuit 4 through the boost module 102; the output end of the microprocessor 2 is electrically connected to the gate of the NMOS tube Q1 through the high-frequency square wave generating circuit 3, and the source of the NMOS tube Q1 is grounded. The resonant circuit 4 includes a first inductor L1, a second inductor L2 and a first capacitor C1, and the output end of the boost module 102 is electrically connected to the positive electrode of the ultrasonic atomizer W through the first inductor L1 and the second inductor L2 in turn, and the negative electrode of the ultrasonic atomizer W is grounded, the first capacitor C1 is connected between the positive electrode of the ultrasonic atomizer W and the ground, and the drain of the NMOS tube Q1 is connected between the first inductor L1 and the second inductor L2. In this embodiment, the chip model of the microprocessor 2 is ESM8BD10.

[0041] After the PWM wave output by the microprocessor 2 is amplified by the high-frequency square wave generating circuit 3, by controlling the continuous switching of the NMOS tube Q1, a power MOS tube (NMOS tube Q1), two power inductors (the first inductor L1 and the second inductor L2) and the first capacitor C1 are used to convert the boosted voltage of the battery 101 into a complete high-frequency sine wave to achieve full-wave oscillation of the ultrasonic atomizer W.

[0042] After the battery 101 is boosted by the boost module 102, it supplies power to the high-frequency square wave generating circuit 3 and the resonant circuit 4. The power module 1 is versatile because the battery 101 is used for power supply and the boost chip in the boost module 102 is used to boost the voltage of the battery 101 to the voltage required by the resonant circuit 4. Figure 4 In the embodiment, VCC is connected to the voltage output terminal of the boost module 102 .

[0043] The resonant circuit 4 further includes a second capacitor C2, which is connected in series with a second inductor L2 between the drain of the NMOS tube Q1 and the positive electrode of the ultrasonic atomizer W. The second capacitor C2 has a relatively small capacitance value, and is mainly used to reduce or eliminate the interference of the parasitic capacitance in the ultrasonic atomizer W, so as to achieve a better resonance effect.

[0044] The resonant circuit 4 further includes a transient diode TVS1, which is connected between the positive electrode of the ultrasonic atomization sheet W and the ground. The transient diode TVS1 is used to protect the ultrasonic atomization sheet W from overvoltage.

[0045] The ultrasonic atomizer working circuit also includes a first resistor R1 and a second resistor R2. The output end of the high-frequency square wave generating circuit 3 is electrically connected to the gate of the NMOS tube Q1 through the first resistor R1, and the second resistor R2 is connected between the gate of the NMOS tube Q1 and the ground.

[0046] The ultrasonic atomizer working circuit also includes a third capacitor C3, one end of which is connected between the first resistor R1 and the second resistor R2, and the other end of which is electrically connected to the gate of the NMOS tube Q1. The third capacitor C3 is a coupling capacitor used to filter out clutter at the front end of the gate of the NMOS tube Q1.

[0047] The high-frequency square wave generating circuit 3 includes a third resistor R3, a fourth capacitor C4 and a square wave amplifier U1. The output end of the microprocessor 2 is electrically connected to the input end of the square wave amplifier U1. The third resistor R3 is connected between the output end of the microprocessor 2 and the ground. The power supply end of the square wave amplifier U1 is grounded through the fourth capacitor C4. The output end of the square wave amplifier U1 is the output end of the high-frequency square wave generating circuit 3.

[0048] The square wave amplifier U1 is used to amplify the PWM wave signal output by the microprocessor 2 and control the continuous switching of the NMOS tube Q1. In this embodiment, the square wave amplifier U1 model is SDM48000.

[0049] The ultrasonic atomizer sheet working circuit also includes a current collection circuit 5 for collecting the working current between the source of the NMOS tube Q1 and the ground, and the output end of the current collection circuit 5 is electrically connected to the input end of the microprocessor 2. The current collection circuit 5 is used to collect the working current and send it to the microprocessor 2, so that the microprocessor 2 adjusts the frequency of the output PWM wave according to the size of the working current, and finally realizes the power adjustment of the ultrasonic atomizer sheet W, so that the power output of the ultrasonic atomizer sheet W is stable and efficient.

[0050] The current acquisition circuit 5 includes a fourth resistor R4, a fifth resistor R5, and a fifth capacitor C5. The fifth resistor R5 is connected between the source of the NMOS tube Q1 and the ground. The source of the NMOS tube Q1 is grounded through the fourth resistor R4 and the fifth capacitor C5 in sequence. The input end of the microprocessor 2 is connected between the fourth resistor R4 and the fifth capacitor C5.

[0051] The battery 101 is a rechargeable battery, such as a rechargeable lithium battery, etc. Accordingly, the power module 1 also includes a charging circuit and a discharge protection circuit, the structures of which are not shown in the drawings, but do not affect the understanding and implementation of the present invention by those skilled in the art.

[0052] The full-wave oscillation principle of the ultrasonic atomizer in the present invention is as follows:

[0053] The microprocessor 2 outputs a PWM wave to the high-frequency square wave generating circuit 3. The PWM wave amplified by the high-frequency square wave generating circuit 3 controls the NMOS tube Q1 to switch on and off continuously.

[0054] When the NMOS tube Q1 is not conducting, the voltage output terminal VCC of the boost module 102 charges the first inductor L1, the second inductor L2 and the first capacitor C1. At this time, VCC>Vtp1>Vtp2, and the driving waveform at Vtp2 is in the positive half-wave of the sine wave; when the NMOS tube Q1 is conducting, Vtp1 is instantly pulled down to close to 0V, and Vtp1>Vtp2, so a negative voltage will be generated at Vtp2 at this time, and the driving waveform at Vtp2 is in the negative half-wave of the sine wave. Therefore, as long as the driving signal PWM wave is a square wave signal with a duty cycle of 50%, a complete and continuous sinusoidal wave driving waveform is obtained at Vtp2. Since Vtp2 is directly connected to the positive pole of the ultrasonic atomizer W, and the negative pole of the ultrasonic atomizer W is connected to the negative pole of the power module 1, a complete high-frequency sinusoidal wave oscillation can be obtained at both ends of the ultrasonic atomizer W, so that the ultrasonic atomizer W oscillates and the ultrasonic electronic cigarette emits smoke.

[0055] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. A full-wave driving circuit for an ultrasonic atomizer, comprising a power module (1), a microprocessor (2), a high-frequency square wave generating circuit (3), an NMOS tube (Q1), a resonant circuit (4) and a current collection circuit (5); the power module (1) comprises a battery (101) and a boost module (102); the output end of the battery (101) is electrically connected to the resonant circuit (4) through the boost module (102); the output end of the microprocessor (2) is electrically connected to the gate of the NMOS tube (Q1) through the high-frequency square wave generating circuit (3), the source of the NMOS tube (Q1) is grounded, the current collection circuit (5) is used to collect the working current between the source of the NMOS tube (Q1) and the ground, the output end of the current collection circuit (5) is electrically connected to the input end of the microprocessor (2), and the characteristics are as follows: The resonant circuit (4) comprises a first inductor (L1), a second inductor (L2) and a first capacitor (C1); the output end of the boost module (102) is electrically connected to the positive electrode of the ultrasonic atomizer (W) through the first inductor (L1) and the second inductor (L2) in sequence; the negative electrode of the ultrasonic atomizer (W) is grounded; the first capacitor (C1) is connected between the positive electrode of the ultrasonic atomizer (W) and the ground; the drain of the NMOS tube (Q1) is connected between the first inductor (L1) and the second inductor (L2); the resonant circuit (4) further comprises a second capacitor (C2); the second capacitor (C2) and the second inductor (L2) are connected in series between the drain of the NMOS tube (Q1) and the positive electrode of the ultrasonic atomizer (W); the resonant circuit (4) further comprises a transient diode (TVS1); the transient diode (TVS1) is connected between the positive electrode of the ultrasonic atomizer (W) and the ground.

2. The ultrasonic atomizer full-wave driving circuit according to claim 1, characterized in that: It also includes a first resistor (R1) and a second resistor (R2); the output end of the high-frequency square wave generating circuit (3) is electrically connected to the gate of the NMOS tube (Q1) through the first resistor (R1); and the second resistor (R2) is connected between the gate of the NMOS tube (Q1) and the ground.

3. The ultrasonic atomizer full-wave driving circuit according to claim 2, characterized in that: It also includes a third capacitor (C3), one end of the third capacitor (C3) is connected between the first resistor (R1) and the second resistor (R2), and the other end of the third capacitor (C3) is electrically connected to the gate of the NMOS tube (Q1).

4. The full-wave driving circuit of an ultrasonic atomizer according to claim 1, characterized in that: The high-frequency square wave generating circuit (3) comprises a third resistor (R3), a fourth capacitor (C4) and a square wave amplifier (U1); the output end of the microprocessor (2) is electrically connected to the input end of the square wave amplifier (U1); the third resistor (R3) is connected between the output end of the microprocessor (2) and the ground; the power supply end of the square wave amplifier (U1) is grounded via the fourth capacitor (C4); and the output end of the square wave amplifier (U1) is the output end of the high-frequency square wave generating circuit (3).

5. The full-wave driving circuit of an ultrasonic atomizer according to claim 1, characterized in that: The current acquisition circuit (5) comprises a fourth resistor (R4), a fifth resistor (R5), and a fifth capacitor (C5); the fifth resistor (R5) is connected between the source of the NMOS tube (Q1) and the ground; the source of the NMOS tube (Q1) is connected to the ground via the fourth resistor (R4) and the fifth capacitor (C5) in sequence; and the input end of the microprocessor (2) is connected between the fourth resistor (R4) and the fifth capacitor (C5).

6. The full-wave driving circuit of an ultrasonic atomizer according to claim 1, characterized in that: The battery (101) is a rechargeable battery.

7. An ultrasonic electronic cigarette, characterized in that: It comprises the full-wave driving circuit of the ultrasonic atomizer sheet as described in any one of claims 1 to 6.

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