# US 12,280,264 B2 · Stimulation source generation circuit for nerve stimulator

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- Number: US 12,280,264 B2
- Document ID: US12280264B2
- Status: Granted
- Kind: B2
- Application number: 17/769,392
- Filed: 2019-11-28
- Published: 2023-06-22
- Granted: 2025-04-22
- Earliest claimed: 2019-10-18
- Assignees: Sceneray Co., Ltd.
- Applicants: Sceneray Co., Ltd.
- Inventors: Bin Liu; Weiran Zhu
- Web page: https://patentgrep.com/patent/US12280264B2

## CPC

- A61N 1/3782: {producing a voltage above the power source level}
- A61N 1/36125: {Details of circuitry or electric components}
- H02M 1/0025: {Arrangements for modifying reference values, feedback values or error values in the control loop of a converter}
- H02M 3/158: including plural semiconductor devices as final control devices for a single load
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)

## Abstract

Provided is a stimulation source generation circuit for a nerve stimulator. A power module supplies an input voltage. A boosting module boosts the input voltage and generates a stimulation source. A charge branch of the boosting module includes an inductor and a first MOS tube. A discharge circuit includes a second MOS tube and an output branch for outputting the stimulation source. An adjustment module outputs an operating frequency according to a magnitude of the stimulation source. The adjustment module is further connected to control ends of the first MOS tube and the second MOS tube and adjusts on or off of the first MOS tube and the second MOS tube according to the operating frequency. The first MOS tube and the second MOS tube cannot be turned on at the same time.

## Claims

### Claim 1

A stimulation source generation circuit for a nerve stimulator, comprising:
a power module,
a boosting module, and
an adjustment module;
wherein the power module is configured to supply an input voltage;
wherein the boosting module is connected to the power module and is configured to boost the input voltage and generate a stimulation source;
wherein the boosting module comprises a charge branch and a discharge branch, wherein the charge branch is connected in parallel with two ends of the power module and comprises an inductor and a first MOS tube, one end of the inductor is connected to a positive electrode of the power module, another end of the inductor is connected to an input end of the first MOS tube, and an output end of the first MOS tube is connected to a negative electrode of the power module;
wherein the discharge branch comprises a second MOS tube and an output branch for outputting the stimulation source, an input end of the second MOS tube is connected to the another end of the inductor, an output end of the second MOS tube is connected to one end of the output branch, and the another end of the output branch is connected to the negative electrode of the power module;
wherein the adjustment module is connected to the output branch and is configured to output an operating frequency according to a magnitude of the stimulation source;
wherein the adjustment module is further connected to a control end of the first MOS tube and a control end of the second MOS tube and is configured to adjust on or off of the first MOS tube and the second MOS tube according to the operating frequency and only at most one of the first MOS tube or the second MOS tube is turned on at a same time;
wherein the adjustment module further comprises a first comparator branch, a frequency controller, and a first set voltage branch, the frequency controller communicatively connected to the control end of the first MOS tube and the control end of the second MOS tube; and
wherein the first comparator branch comprises a first comparator, an output end of the first comparator connected to the frequency controller, one of a positive input end or a negative input end of the first comparator selectively connected to the output branch, and another one of the positive input end or the negative input end of the first comparator connected to the first set voltage branch.

### Claim 2 (depends on 1)

The stimulation source generation circuit of claim 1, wherein the power module comprises a battery, an input capacitor connected in parallel with two ends of the battery, and a first switch connected between the battery and the input capacitor.

### Claim 3 (depends on 1)

The stimulation source generation circuit of claim 1, wherein the adjustment module further comprises an oscillator and a driver that are communicatively connected to the frequency controller, the oscillator is connected to an input end of the driver, and an output end of the driver is connected to the control end of the first MOS tube and the control end of the second MOS tube.

### Claim 4 (depends on 3)

The stimulation source generation circuit of claim 3, further comprising a first sampling module,
wherein the first sampling module comprises a third resistor, a second comparator branch, and a second set voltage branch, one end of the third resistor is connected to the negative electrode of the power module and another end of the third resistor is connected to the output end of the first MOS tube;
wherein the second comparator branch comprises a second comparator, and an output end of the second comparator is connected to the driver; and
wherein one of a positive input end or a negative input end of the second comparator is selectively connected to the second set voltage branch, and another one of the positive input end or the negative input end of the second comparator is connected to the another end of the third resistor.

### Claim 5 (depends on 4)

The stimulation source generation circuit of claim 4, further comprising a reference voltage module capable of generating a second set voltage;
wherein the second set voltage branch comprises a second capacitor, and one end of the second capacitor is grounded;
wherein the second comparator branch further comprises a second single pole double throw switch, and two movable ends of the second single pole double throw switch are connected to the reference voltage module and the another end of the third resistor, respectively;
wherein the second comparator further comprises a third switch connected to the output end of the second comparator and another end of the second capacitor; and
wherein one of the positive input end or the negative input end of the second comparator is connected to a stationary end of the second single pole double throw switch, and another one of the positive input end or the negative input end of the second comparator is connected to the another end of the second capacitor.

### Claim 6 (depends on 3)

The stimulation source generation circuit of claim 3, further comprising a second sampling module, wherein the second sampling module comprises a fourth resistor, a third comparator branch, and a third set voltage branch, and the fourth resistor is connected between the output end of the second MOS tube and the output branch; and the third comparator branch comprises a third comparator, and an output end of the third comparator is connected to the driver; and a positive input end and a negative input end of the third comparator branch are connected in parallel with two ends of the fourth resistor.

### Claim 7 (depends on 6)

The stimulation source generation circuit of claim 6, wherein the third comparator branch further comprises the third set voltage branch connected to a common-mode input end of the third comparator.

### Claim 8 (depends on 7)

The stimulation source generation circuit of claim 7, further comprising a reference voltage module capable of generating a third set voltage;
wherein the third set voltage branch comprises a third capacitor and a fourth switch, and one end of the third capacitor is grounded, and another end of the third capacitor is connected to the common-mode input end of the third comparator; and
wherein one end of the fourth switch is connected to the another end of the third capacitor, and another end of the fourth switch is connected to the reference voltage module.

### Claim 9 (depends on 1)

The stimulation source generation circuit of claim 1, wherein the output branch comprises an output capacitor, two ends of the output capacitor are connected to the output end of the second MOS tube and the negative electrode of the power module, respectively, and the two ends of the output capacitor are used for outputting the stimulation source; the output branch further comprises a voltage divider branch connected in parallel with the two ends of the output capacitor, the voltage divider branch comprises a first resistor and a second resistor connected in series, and the first comparator is selectively connected between the first resistor and the second resistor.

### Claim 10 (depends on 1)

The stimulation source generation circuit of claim 1, further comprising a reference voltage module capable of generating a first set voltage;
wherein the first set voltage branch comprises a first capacitor, and one end of the first capacitor is grounded;
wherein the first comparator branch further comprises a first single pole double throw switch, and two movable ends of the first single pole double throw switch are connected to the output branch and the reference voltage module, respectively;
wherein the first comparator branch further comprises a second switch, and the second switch is connected between the output end of the first comparator and another end of the first capacitor; and
wherein one of the positive input end or the negative input end of the first comparator is selectively connected to a stationary end of the first single pole double throw switch, and another one of the positive input end or the negative input end of the first comparator is connected to the another end of the first capacitor.