# US 12,349,264 B2 · Control circuit of atmospheric plasma generating device and atmospheric plasma generating system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,349,264 B2 - Document ID: US12349264B2 - Status: Granted - Kind: B2 - Application number: 18/239,244 - Filed: 2023-08-29 - Published: 2025-01-02 - Granted: 2025-07-01 - Earliest claimed: 2023-06-27 - Assignees: Ming Chi University of Technology - Applicants: Ming Chi University of Technology - Inventors: Jhih-Yan He; Li-Chun Chang; Jyh-Wei Lee; Ming-Hung Chen - Web page: https://patentgrep.com/patent/US12349264B2 ## CPC - H05H 1/46: using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H1/26 takes precedence) - H05H 1/4652: {using inductive coupling means, e.g. coils} - H05H 2240/10: at atmospheric pressure - H05H 2242/24: Radiofrequency or microwave generators - H05H: PLASMA TECHNIQUE (apparatus or processes specially adapted for producing X-rays H05G2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS ## Abstract Disclosed is a control circuit of an atmospheric plasma generating device, comprising: a power supply suppling power to the control circuit, a switching element, a first set of resistors, a second set of resistors, a set of Zener diodes, a set of transistors electrically coupled to the switching element, the set of Zener diodes, the first set of resistors and the second set of resistors. The control circuit further includes a capacitor, an inductor, and a set of diodes electrically coupled to the first set of resistors or the second set of resistors. ## Claims ### Claim 1 A control circuit of an atmospheric plasma generating device, disposed on a substrate to control the atmospheric plasma generating device, comprising: a power supply, a switching element, a first set of resistors, a second set of resistors, a set of Zener diodes, a set of transistors, a capacitor, a set of diodes, and an inductor; the power supply suppling power to the control circuit; the switching element being electrically coupled to the set of transistors; the set of transistors being respectively electrically coupled to the set of Zener diodes, the first set of resistors and the second set of resistors; the set of diodes being respectively electrically coupled to the first set of resistors or the second set of resistors; the capacitor being electrically coupled to any one of the set of diodes; the inductor being electrically coupled to the power supply; and the control circuit being electrically coupled to the atmospheric plasma generating device through a transformer. ### Claim 2 A control circuit of an atmospheric plasma generating device, disposed on a substrate to control the atmospheric plasma generating device, comprising: a power supply, a switching element, a first resistor, a second resistor, a third resistor, a fourth resistor, a first Zener diode, a second Zener diode, a first transistor, a second transistor, a capacitor, a first diode, a second diode, an inductor; the power supply suppling power to the control circuit; the switching element being electrically coupled to the first transistor and the second transistor; the first transistor and the second transistor being respectively electrically coupled to the first Zener diode, the second Zener diode, the first resistor, the second resistor, the third resistor and the fourth resistor; the first diode and the second diode being respectively electrically coupled to the first resistor or the second resistor; the capacitor being electrically coupled to any one of the first diode and the second diode; the inductor being electrically coupled to the power supply; and the control circuit being electrically coupled to the atmospheric plasma generating device through a transformer. ### Claim 3 (depends on 2) The control circuit of an atmospheric plasma generating device as claimed in claim 2, wherein one end of the switching element is electrically coupled to the first transistor and the second transistor, and the other end of the switching element is grounded. ### Claim 4 (depends on 2) The control circuit of an atmospheric plasma generating device as claimed in claim 2, wherein the inductor, the first diode and the second diode are connected in parallel. ### Claim 5 (depends on 2) The control circuit of an atmospheric plasma generating device as claimed in claim 2, wherein the first resistor and the second resistor are configured to disperse excess voltage into a gate of the first transistor or the second transistor. ### Claim 6 (depends on 2) The control circuit of an atmospheric plasma generating device as claimed in claim 2, wherein the third resistor and the fourth resistor are configured to drain excess gate charge on the first transistor or the second transistor. ### Claim 7 (depends on 2) The control circuit of an atmospheric plasma generating device as claimed in claim 2, wherein the first Zener diode and the second Zener diode are configured to limit a gate voltage of the first transistor or the second transistor to be less than 12 volts. ### Claim 8 (depends on 2) The control circuit of an atmospheric plasma generating device as claimed in claim 2, wherein the capacitor is connected in parallel with the transformer. ### Claim 9 (depends on 2) The control circuit of an atmospheric plasma generating device as claimed in claim 2, wherein the first diode and the second diode are configured to change the on or off state of the first transistor and the second transistor; when a source of the first transistor is turned on, a cathode of the first diode is equivalent to being grounded by the first transistor; simultaneously, the first diode is in the forward-biased state, so that a gate of the second transistor that was originally turned on is grounded, and the second transistor is off and not biased. ### Claim 10 An atmospheric plasma generation system, comprising: an atmospheric plasma generating device; a transformer electrically coupled to the atmospheric plasma generating device; and a control circuit, disposed on a substrate and electrically coupled to the transformer, to control the atmospheric plasma generating device, the control circuit including: a power supply for supplying power to the control circuit; an inductor electrically coupled to the power supply; a first switching circuit composed of a first transistor, a first Zener diode, a first resistor, a third resistor, a first diode and a capacitor that are electrically coupled to each other, wherein the first diode is connected in series with the capacitor, and the first diode is electrically coupled to the first resistor and the third resistor; a second switching circuit composed of a second transistor, a second Zener diode, a second resistor, a fourth resistor, and a second diode that are electrically coupled to each other, wherein the second diode is connected in parallel with the first diode, and the second diode is electrically coupled to the second resistor and the fourth resistor; and a switching element that is electrically coupled to the first transistor and the second transistor.