# US 2025/0083186 A1 · Aerosol generating device with driving circuit matching the impedance of ultrasonic vibrator

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- Number: US 2025/0083186 A1
- Document ID: US20250083186A1
- Status: Published application
- Kind: A1
- Application number: 18/567,958
- Filed: 2023-07-14
- Published: 2025-03-13
- Earliest claimed: 2022-07-20
- Assignees: Kt&G Corporation
- Applicants: Kt&G Corporation
- Inventors: Jangwon SEO; Gyung Min GO; Chul Ho JANG; Jin Chul JUNG
- Web page: https://patentgrep.com/patent/US20250083186A1

## CPC

- B06B 1/0207: {Driving circuits (specially adapted for particular applications, see the relevant subclass, e.g. G01; circuits for steering transducer arrays G10K11/34; basic circuits H03)}
- B06B 1/0215: {for generating pulses, e.g. bursts of oscillations, envelopes}
- A24F 40/05: Devices without heating means
- A24F 40/40: Constructional details, e.g. connection of cartridges and battery parts
- A24F 40/50: Control or monitoring
- A24F 40/10: Devices using liquid inhalable precursors
- B06B 2201/55: Piezoelectric transducer
- B06B 2201/77: Atomizers
- B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R)
- A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06)

## Abstract

According to an example embodiment, a drive circuit for supplying power to a vibrator includes one or more capacitors connected in parallel, an inductor connected to a first electrical contact point, a switch having a drain terminal connected to the first electrical contact point, a first power source configured to provide a voltage to a gate terminal of the switch, a second power source configured to provide a voltage to a second end of the inductor, and a resistor connected between the gate terminal of the switch and the ground.

## Claims

### Claim 1

A drive circuit comprising:
a first electrical contact point that is connectable to a first end of a vibrator included in a cartridge and a second electrical contact point that is connectable to a second end of the vibrator;
one or more capacitors connected in parallel between the first electrical contact point and the second electrical contact point, wherein a first end of the one or more capacitors is connected to the first electrical contact point and a second end of the one or more capacitors is connected to the second electrical contact point;
an inductor connected to the first electrical contact point, wherein a first end of the inductor is connected to the first electrical contact point;
a switch having a drain terminal connected to the first electrical contact point, wherein a source terminal of the switch is connected to a ground;
a first power source configured to provide a voltage to a gate terminal of the switch;
a second power source configured to provide a voltage to a second end of the inductor; and
a resistor connected between the gate terminal of the switch and the ground.

### Claim 2 (depends on 1)

The drive circuit of claim 1, further comprising:
one or more matching inductors connected in parallel between the first electrical contact point and the first end of the inductor, wherein a first end of the one or more matching inductors is connected to the first electrical contact point, and a second end of the one or more matching inductors is connected to the drain terminal of the switch.

### Claim 3 (depends on 1)

The drive circuit of claim 1, further comprising:
a switch connected between the first end of the one or more capacitors and the first electrical contact point, or between the second end of the one or more capacitors and the second electrical contact point.

### Claim 4 (depends on 2)

The drive circuit of claim 2, further comprising:
a switch connected in parallel with the one or more matching inductors.

### Claim 5 (depends on 1)

The drive circuit of claim 1, wherein the first power source is configured to provide an alternating current (AC) voltage to the gate terminal of the switch.

### Claim 6 (depends on 1)

The drive circuit of claim 1, wherein the second power source is configured to provide a direct current (DC) voltage to the second end of the inductor and the first end of the vibrator.

### Claim 7 (depends on 1)

An electronic cigarette comprising the drive circuit of claim 1.

### Claim 8

A drive circuit of an electronic device, comprising:
a first electrical contact point that is connectable to a first end of a vibrator included in a cartridge and a second electrical contact point that is connectable to a second end of the vibrator;
one or more matching inductors connected to the first electrical contact point, wherein a first end of the one or more matching inductors is connected to the first electrical contact point and the one or more matching inductors are connected in parallel;
an inductor connected to a second end of the one or more matching inductors, wherein a first end of the inductor is connected to the second end of the one or more matching inductors;
a switch having a drain terminal connected to the second end of the one or more matching inductors, wherein a source terminal of the switch is connected to a ground;
a first power source configured to provide a voltage to a gate terminal of the switch;
a second power source configured to provide a voltage to a second end of the inductor; and
a resistor connected between the gate terminal of the switch and the ground.

### Claim 9

An electronic device comprising:
a body configured to be connected to a cartridge,
wherein the body comprises:
a driver circuit configured to, when the cartridge is connected to the body, drive a vibrator of the cartridge; and
a controller configured to control an operation of the drive circuit, and
wherein the drive circuit comprises:
at least one of a first circuit and a second circuit,
wherein the first drive circuit comprises:
a first electrical contact point that is connectable to a first end of the vibrator and a second electrical contact point, that is connectable to a second end of the vibrator;
one or more capacitors connected in parallel between the first electrical contact point and the second electrical contact point, wherein a first end of the one or more capacitors is connected to the first electrical contact point and a second end of the one or more capacitors is connected to the second electrical contact point;
an inductor connected to the first electrical contact point, wherein a first end of the inductor is connected to the first electrical contact point;
a switch having a drain terminal connected to the first electrical contact point, wherein a source terminal of the switch is connected to a ground;
a first power source configured to provide a voltage to a gate terminal of the switch;
a second power source configured to provide a voltage to a second end of the inductor; and
a resistor connected between the gate terminal of the switch and the ground
wherein the second drive circuit comprises:
a first electrical contact point that is connectable to a first end of the vibrator and a second electrical contact point that is connectable to a second end of the vibrator;
one or more matching inductors connected to the first electrical contact point, wherein a first end of the one or move matching inductors is connected to the first electrical contact point and the one or more matching inductors are connected in parallel;
an inductor connected to a second end of the one or more matching inductors, wherein a first end of the inductor is connected to the second end of the one or more matching inductors;
a switch having a drain terminal connected to the first end of the one or more matching inductors, wherein a source terminal of the switch is connected to a ground;
a first power source configured to provide a voltage to a gate terminal of the switch;
a second power source configured to provide a voltage to a second end of the inductor; and
a resistor connected between the gate terminal of the switch and the ground.