CN113117229A - Circuit for pulse generator, pulse generator and deep brain electrical stimulation system - Google Patents
Circuit for pulse generator, pulse generator and deep brain electrical stimulation system Download PDFInfo
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- CN113117229A CN113117229A CN201911424100.6A CN201911424100A CN113117229A CN 113117229 A CN113117229 A CN 113117229A CN 201911424100 A CN201911424100 A CN 201911424100A CN 113117229 A CN113117229 A CN 113117229A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/3606—Implantable neurostimulators for stimulating central or peripheral nerve system adapted for a particular treatment
- A61N1/36103—Neuro-rehabilitation; Repair or reorganisation of neural tissue, e.g. after stroke
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/025—Digital circuitry features of electrotherapy devices, e.g. memory, clocks, processors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/36125—Details of circuitry or electric components
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/35—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
Abstract
The invention discloses a circuit for a pulse generator, the pulse generator and a deep brain electrical stimulation system. In addition, the charging coil and the communication coil are combined into a whole, under the condition of the same communication success rate, the charging function and the communication function are realized on the same coil, and the coil not only transmits charging energy but also transmits communication information. By adopting the scheme provided by the invention, the charging coil and the communication coil can be combined into a whole, and a very large volume can be saved in the limited space of the implanted chargeable deep stimulator for the computer. Therefore, the structural design and the component assembly process of the implanted pulse generator are simplified, and the production cost of the coil is reduced. Under the condition of equal communication success rate, the problems of large size, heavy weight and low efficiency of the pulse generator in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of implantable medical instruments, and particularly relates to a circuit for a pulse generator, the pulse generator and a deep brain electrical stimulation system.
Background
With the development of brain surgery technology and neuroelectronic science technology, Deep Brain Stimulation (DBS) is the first choice for treating advanced parkinson disease worldwide by virtue of its clinical effects superior to those of destructive surgery, minimally invasive surgery process without damaging brain tissue and reversible treatment scheme. The existing deep brain stimulation system mainly comprises a pulse generator (IPG) implanted in a body, a stimulation electrode (Lead), an in-vivo Extension Lead (Extension), in-vitro program control equipment (programmer & Remoter), a related Surgical tool (Surgical tool) and the like.
In the DBS system, remote communication to an Implanted Pulse Generator (IPG) is the only means for monitoring the working state of the implanted device, the success rate of communication is the key to ensure that the implanted device has better therapeutic effect and higher reliability, and enterprises who have acquired the sales qualification of deep brain electrical stimulation devices are not reluctant to develop communication circuits with longer distance and higher success rate. Therefore, most manufacturers adopt independent near field communication coils to complete communication, so that two coils, namely a charging coil and a communication coil, are arranged in one pulse generator (IPG), and the defects of the product are large volume, heavy weight and low efficiency.
For example, the medtronic and boston technologies use low frequency communication when the active implantable medical device and the external programmable device are wirelessly communicated, but the wireless communication coil and the charging coil are separately and independently arranged, which causes the volume of the active implantable medical device to increase and the circuit to be complicated, and puts higher requirements on production and assembly.
In the prior art, the charging function and the communication function of the DBS system are separately and independently designed, which results in an increase in the volume of the active implantable medical device and a complex circuit, and puts higher requirements on production and assembly. Therefore, it is necessary to provide a solution to the problems of large size, heavy weight and low efficiency of the pulse generator.
Disclosure of Invention
The invention aims to provide a circuit for a pulse generator, the pulse generator and a deep brain electrical stimulation system, which are used for solving the problems that in the prior art, a charging coil and a communication coil of a DBS system are separately and independently designed, so that the volume of an active implantable medical device is increased, the circuit is complex, and higher requirements are put forward on production and assembly.
In order to solve the above technical problem, a first aspect of the present invention provides a circuit for a pulse generator, for implementing charging and communication of an IPG, including a low frequency resonant circuit and an ASK modulation circuit;
wherein the low frequency resonant circuit is connected in series with the ASK modulation circuit;
the low-frequency resonant circuit is used for providing a charging signal to charge the IPG and transmitting a carrier signal and a first signal to the ASK modulation circuit;
the ASK modulation circuit is configured to modulate the first signal in accordance with the carrier signal to communicate with the IPG.
Optionally, the low-frequency resonant circuit includes a power supply, a charging module connected to the power supply, and a communication module, where the carrier signal and the first signal are transmitted to the charging module through the communication module, and are transmitted to the ASK modulation circuit through the charging module.
Optionally, the communication module includes a first field effect transistor and a second field effect transistor, and the charging module includes a first capacitor, a second capacitor, a first coil and a second coil;
the positive electrode of the power supply is connected with one end of the first coil, the other end of the first coil is connected with the drain electrode of the first field effect transistor, the source electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor, and the grid electrode of the first field effect transistor is used for transmitting the carrier signal;
the source electrode of the second field effect transistor is connected with the negative electrode of the power supply and grounded, and the grid electrode of the second field effect transistor is used for transmitting the first signal;
the first capacitor is connected in parallel to two ends of the first coil, and the first coil and the second coil are coupled with each other;
the second capacitor is connected in parallel to two ends of the second coil, and the second coil is connected in series with the ASK modulation circuit.
Optionally, the first coil and the first capacitor have a first resonant frequency, and the first resonant frequency is equal to the frequency of the carrier signal.
Optionally, the second coil and the second capacitor have a second resonant frequency, and the second resonant frequency is equal to the frequency of the carrier signal.
Optionally, the first coil is a charging coil, the first capacitor is a charging capacitor, the second coil is a receiving coil, and the second capacitor is a receiving capacitor.
Optionally, the ASK modulation circuit includes a rectification circuit, a first resistor, and a third field effect transistor;
one end of the first resistor is connected with one end of the second coil, and the rectifying circuit is connected between one end of the second coil and one end of the first resistor;
the other end of the first resistor is connected with the drain electrode of the third field effect transistor, and the source electrode of the third field effect transistor is connected with the other end of the second coil;
and the drain electrode of the third field effect tube is connected with the output end of the ASK modulation circuit.
Optionally, the rectifying circuit includes a diode and a third capacitor;
the anode of the diode is connected with one end of the second coil and the source of the third field effect transistor respectively, and the cathode of the diode is connected with one end of the third capacitor and one end of the first resistor respectively;
the other end of the third capacitor is connected with the source electrode of the third field effect transistor.
Based on the same inventive concept, the invention proposes a pulse generator comprising a circuit for a pulse generator according to any of the above-mentioned characterizing clauses.
Based on the same inventive concept, the invention also provides a deep brain electrical stimulation system, which comprises the pulse generator in the characteristic description.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention provides a circuit for a pulse generator, the pulse generator and a deep brain electrical stimulation system. The blank of the charging and communication integrated circuit in the prior art is made up.
In addition, the charging coil and the communication coil are combined into a whole, under the condition of the same communication success rate, the charging function and the communication function are realized on the same coil, and the coil not only transmits charging energy but also transmits communication information. By adopting the scheme provided by the invention, the charging coil and the communication coil can be combined into a whole, and a very large volume can be saved in the limited space of the implanted chargeable deep stimulator for the computer. Therefore, the structural design and the component assembly process of the implanted pulse generator are simplified, and the production cost of the coil is reduced. Under the condition of equal communication success rate, the problems of large size, heavy weight and low efficiency of the pulse generator in the prior art are solved.
Drawings
Fig. 1 is a schematic circuit diagram of a pulse generator according to an embodiment of the present invention;
FIG. 2 is a schematic circuit logic diagram for a pulse generator according to an embodiment of the present invention;
100-low frequency resonance circuit, 200-ASK modulation circuit, DC-power supply, V1-first field effect transistor, V2-second field effect transistor, C1-first capacitor, C2-second capacitor, L1-first coil, L2-second coil, R-first resistor, V3-third field effect transistor, D-diode, and C3-third capacitor.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Referring to fig. 1 and 2, an embodiment of the present invention provides a circuit for a pulse generator, which is used to implement charging and communication of an IPG, and includes a low frequency resonant circuit 100 and an ASK modulation circuit 200. The low frequency resonant circuit 100 is connected in series with the ASK modulation circuit 200, and the low frequency resonant circuit 100 is configured to provide a charging signal to charge the IPG and transmit a carrier signal and a first signal to the ASK modulation circuit 200. The ASK modulation circuit 200 is configured to modulate the first signal in accordance with the carrier signal to communicate with the IPG. The output Vsrx of the ASK modulation circuit 200 serves as a communication port for communicating with the IPG.
The difference from the prior art is that, by connecting the low frequency resonant circuit 100 in series with the ASK modulation circuit 200, the low frequency resonant circuit 100 can provide a charging signal to charge the IPG, and in addition, the carrier signal and the first signal are also loaded in the low frequency resonant circuit 100, where the first signal is actually a signal or a command that needs to be transmitted for communication to the IPG, for example, the first signal may be a command for the IPG to emit a pulse current. The carrier signal and the first signal are transmitted to the ASK modulation circuit 200 through the low-frequency resonant circuit 100, the ASK modulation circuit 200 modulates the first signal according to the carrier signal, and generates a modulated signal, which is a modulated signal or instruction that needs to be transmitted for communication to the IPG, and the modulated signal is transmitted to the IPG to implement communication to the IPG. It should be noted that, after the ASK modulation circuit 200 modulates the first signal, the ASK modulation circuit also demodulates the modulated signal before transmitting the modulated signal to the IPG, and the demodulated modulated signal is a signal or a command that is finally transmitted to the IPG. In addition, according to the principle of signal modulation and demodulation, it can be understood that the demodulation process of the ASK modulation circuit 200 on the modulated signal may be ASK demodulation. In the embodiment of the present invention, the specific method for ASK demodulation is an envelope detection method (non-coherent demodulation), and in other embodiments, the specific method for ASK demodulation may also be implemented by using a synchronous detection method (coherent demodulation), which may be specifically selected according to actual needs, and is not limited herein. Through the effective series connection of the low-frequency resonant circuit 100 and the ASK modulation circuit 200, the low-frequency resonant circuit 100 can be used for charging, and communication transmission can be realized through the ASK modulation circuit 200. The blank of the charging and communication integrated circuit in the prior art is made up.
Specifically, referring to fig. 2, the low frequency resonant circuit 100 may include a power supply DC, a charging module connected to the power supply DC, and a communication module, where the carrier signal and the first signal are transmitted to the charging module through the communication module, and are transmitted to the ASK modulation circuit 200 through the charging module. Preferably, referring to fig. 1, the communication module includes a first fet V1 and a second fet V2, and the charging module includes a first capacitor C1, a second capacitor C2, a first coil L1 and a second coil L2. The positive electrode of the power supply DC is connected to one end of the first coil L1, the other end of the first coil L1 is connected to the drain of the first fet V1, the source of the first fet V1 is connected to the drain of the second fet V2, the gate of the first fet V1 is used for transmitting the carrier signal, and the control of the frequency of the carrier signal can be realized by turning on and off the first fet V1. The source of the second fet V2 is connected to the negative terminal of the power DC and grounded, the gate of the second fet V2 is used to transmit the first signal, and the control of the frequency of the carrier signal can be achieved by turning on and off the second fet V2. The first capacitor C1 is connected in parallel across the first coil L1, and the first coil L1 and the second coil L2 are coupled to each other. The second capacitor C2 is connected in parallel across the second coil L2, and the second coil L2 is connected in series with the ASK modulation circuit 200.
The first coil L1 and the second coil L2 are inductors, the first coil L1 is used as a charging coil, the first capacitor C1 is used as a charging capacitor, the second coil L2 is used as a receiving coil, and the second capacitor C2 is used as a receiving capacitor. When the low frequency resonant circuit 100 is turned on, the first coil L1 generates an electromagnetic field, the electromagnetic field is transmitted to the second coil L2, the second coil L2 generates a resonant electromagnetic field, and the resonant electromagnetic field is converted into electric energy by the second coil L2 to realize a charging function. In addition, the first coil L1 and the second coil L2 are used to transmit communication signals in addition to the charging function. The low-frequency resonant circuit 100 further transmits the carrier signal and the first signal, the first signal is loaded on the carrier signal, the ASK modulation circuit 200 modulates the first signal according to the carrier signal and generates a modulated signal, the modulated signal is transmitted to the IPG after being demodulated, and a resonant voltage on the low-frequency resonant circuit 100 is changed by a load change in the IPG, so as to implement communication with the IPG.
It should be noted that, the sizes of the first coil L1, the second coil L2, the first capacitor C1 and the second capacitor C2 are not limited, and preferably, the first coil L1 and the first capacitor C1 have a first resonant frequency, and the first resonant frequency is equal to the frequency of the carrier signal; the second coil L2 and the second capacitor C2 have a second resonant frequency that is equal to the frequency of the carrier signal. For example, in the embodiment of the present invention, the frequency of the carrier signal is set to 7.12kHz, the inductance of the first coil L1 is L1, the inductance of the second coil L2 is L2, the capacitance of the first capacitor C1 is C1, the capacitance of the second capacitor C2 is C2, and the first resonant frequency F1 is calculated as: f1 is 1/(2 pi (L1 × C1) ^0.5), and the calculation formula of the second resonance frequency F2 is: f2 is 1/(2 pi (L2 × C2) ^0.5), so L1, L2, C1, C2 are sufficient: 1/(2 pi (L1 × C1) ^0.5) ^ 1/(2 pi (L2 × C2) ^0.5) ^ 7.12 kHz. For convenience of illustration, in the embodiment of the present invention, the inductance of the first coil L1 is set to 1mH, the capacitance of the first capacitor C1 is set to 500nf, the inductance of the second coil L2 is set to 4mH, and the capacitance of the second capacitor C2 is set to 125 nf. It should be noted that, in this embodiment, the frequency of the carrier signal is set to 7.12kHz, and it is understood that, in other embodiments, the frequency of the carrier signal may also be set to other values, for example, it may also be 6kHz or 8kHz, and the specific value of the frequency of the carrier signal may be selected according to actual needs, which is not limited herein. In addition, the inventors found that when the frequency of the carrier signal exceeds 10kHz, the transmission efficiency of the carrier signal is low, and thus, setting the frequency of the carrier signal to less than 10kHz may be preferably implemented.
The charging coil and the communication coil are combined into one, under the condition of equal communication success rate, the charging function and the communication function are realized on the same coil, and the coil not only transmits charging energy but also transmits communication information. By adopting the scheme provided by the invention, the charging coil and the communication coil can be combined into a whole, and a very large volume can be saved in the limited space of the implanted chargeable deep stimulator for the computer. Therefore, the structural design and the component assembly process of the implanted pulse generator are simplified, and the production cost of the coil is reduced. Under the condition of equal communication success rate, the problems of large size, heavy weight and low efficiency of the pulse generator in the prior art are solved.
Preferably, the power supply DC is provided as a direct current power supply.
Preferably, the ASK modulation circuit 200 includes a rectifying circuit, a first resistor R, and a third field effect transistor V3, wherein one end of the first resistor R is connected to one end of the second coil L2, and the rectifying circuit is connected between one end of the second coil L2 and one end of the first resistor R. The other end of the first resistor R is connected with the drain of the third field effect transistor V3, the source of the third field effect transistor V3 is connected with the other end of the second coil L2, and the drain of the third field effect transistor V3 is connected with one end of the second coil L2. The drain of the third fet V3 is also connected to the output Vsrx of the ASK modulation circuit. The first resistor R is used for preventing an excessive current from occurring during amplitude modulation of the ASK modulation circuit 200, and the first resistor R is arranged in the ASK modulation circuit 200 as a current-limiting resistor to limit the current of a circuit where the first resistor R is located, so as to prevent the excessive current from burning out a circuit component connected in series with the first resistor R. The third fet V3 effects a change in the IPG load by turning it on and off.
Optionally, the rectifying circuit includes a diode D and a third capacitor C3. An anode of the diode D is connected to one end of the second coil L2 and a source of the third fet V3, and a cathode of the diode D is connected to one end of the third capacitor C3 and one end of the first resistor R. The other end of the third capacitor C3 is connected to the source of the third fet V3.
For convenience of illustration, a specific scheme is provided in the embodiment of the present invention, please refer to fig. 1 again, including a carrier signal Vcarry with a frequency of 7.12kHz, a first signal Vstx with a frequency of 1.2kHz, the power supply DC is set to be a 5V DC power supply, the types of the first fet V1, the second fet V2, and the second fet V2 are all set to be AO3400, the first coil is a 1mH charging coil L1, the first capacitor is a 500nf charging capacitor C1, the second coil is a 4mH receiving coil L2, the second capacitor is a 125nf receiving capacitor C1, the diode D is a 1N5819, the third capacitor is a 10uf filtering capacitor C3, and the resistance of the first resistor is 1K Ω. Wherein:
a 1mH charging coil L1 is connected in parallel with a 500nf charging capacitor C1; the positive pole of a 5V direct-current power supply DC is connected with one end of a 1mH charging coil L1; the DC negative electrode of the 5V direct-current power supply is connected with the source electrode of the AO3400 field-effect tube V2 and is grounded; the other end of the 1mH charging coil L1 is connected with the drain electrode of an AO3400 field effect transistor V1; the source electrode of the AO3400 field effect transistor V1 is connected with the drain electrode of the AO3400 field effect transistor V2; the grid electrode of the AO3400 field effect transistor V1 is connected with a carrier signal Vcarry of 7.12 kHz; the gate of AO3400 FET V2 is connected to a first signal Vstx at 1.2 kHz.
The 4mH power receiving coil L2 is connected with the 125nf power receiving capacitor C2 in parallel; one end of the 4mH power receiving coil L2 is connected with the anode of a 1N5819 diode D and the drain of an AO3400 field effect tube V3; the other end of the 4mH receiving coil L2 is connected with the source of the AO3400 field effect transistor V3 and one end of a 10uf filter capacitor C3 and is grounded; the cathode of the 1N5819 diode D is connected with the other end of the 10uf filter capacitor C3 and one end of the 1K resistor R1; the other end of the 1K resistor R1 is connected with the drain electrode of the AO3400 field effect transistor V3; the drain of the AO3400 fet V3 is further connected to an output terminal Vsrx for outputting demodulated information to enable communication with the IPG, the transmission rate of the information output from the output terminal Vsrx being 100 bps.
When the L1 passes through the left low-frequency resonant circuit 100, the first signal Vstx with a low frequency is loaded on the carrier signal Vcarry, and since Vcarry is a 7.12kHz signal, it is necessary to ensure that the resonant frequency of the charging coil and the charging capacitor is also 7.12kHz, and the resonant frequency of the receiving coil and the receiving capacitor is also 7.12 kHz. At this time, in addition to the function of charging the circuit on the right of L2, the carrier signal is transmitted to the circuit on the right of L2 through the resonant electromagnetic field of the charging coil and the receiving coil, and then enters the ASK modulation circuit 200 to realize the transmission of the communication signal.
An embodiment of the present invention further provides a pulse generator, including the circuit for a pulse generator described in any of the above feature descriptions.
The embodiment of the invention also provides a deep brain electrical stimulation system which comprises the pulse generator in the characteristic description.
In summary, the present invention provides a circuit for a pulse generator, a pulse generator and a deep brain electrical stimulation system, which are different from the prior art in that the low frequency resonant circuit is connected in series with the ASK modulation circuit, and the two circuits are effectively connected in series, so that both charging by the low frequency resonant circuit and communication transmission by the ASK modulation circuit can be realized. The blank of the charging and communication integrated circuit in the prior art is made up.
In addition, the charging coil and the communication coil are combined into a whole, under the condition of the same communication success rate, the charging function and the communication function are realized on the same coil, and the coil not only transmits charging energy but also transmits communication information. By adopting the scheme provided by the invention, the charging coil and the communication coil can be combined into a whole, and a very large volume can be saved in the limited space of the implanted chargeable deep stimulator for the computer. Therefore, the structural design and the component assembly process of the implanted pulse generator are simplified, and the production cost of the coil is reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example" or "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A circuit for a pulse generator for enabling charging and communication of an IPG, comprising a low frequency resonant circuit and an ASK modulation circuit;
wherein the low frequency resonant circuit is connected in series with the ASK modulation circuit;
the low-frequency resonant circuit is used for providing a charging signal to charge the IPG and transmitting a carrier signal and a first signal to the ASK modulation circuit;
the ASK modulation circuit is configured to modulate the first signal in accordance with the carrier signal to communicate with the IPG.
2. The circuit for a pulse generator according to claim 1, wherein the low frequency resonance circuit comprises a power supply, a charging module connected to the power supply, and a communication module, the carrier signal and the first signal being transmitted to the charging module via the communication module and to the ASK modulation circuit via the charging module.
3. The circuit for a pulse generator according to claim 2, wherein the communication module comprises a first field effect transistor and a second field effect transistor, and the charging module comprises a first capacitor, a second capacitor, a first coil, and a second coil;
the positive electrode of the power supply is connected with one end of the first coil, the other end of the first coil is connected with the drain electrode of the first field effect transistor, the source electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor, and the grid electrode of the first field effect transistor is used for transmitting the carrier signal;
the source electrode of the second field effect transistor is connected with the negative electrode of the power supply and grounded, and the grid electrode of the second field effect transistor is used for transmitting the first signal;
the first capacitor is connected in parallel to two ends of the first coil, and the first coil and the second coil are coupled with each other;
the second capacitor is connected in parallel to two ends of the second coil, and the second coil is connected in series with the ASK modulation circuit.
4. The circuit for a pulse generator as defined in claim 3, wherein the first coil and the first capacitor have a first resonant frequency that is equal to a frequency of the carrier signal.
5. The circuit for a pulse generator as defined in claim 3, wherein the second coil and the second capacitance have a second resonant frequency that is equal to a frequency of the carrier signal.
6. The circuit of claim 3, wherein the first coil is a charging coil, the first capacitor is a charging capacitor, the second coil is a receiving coil, and the second capacitor is a receiving capacitor.
7. The circuit for a pulse generator according to claim 3, wherein the ASK modulation circuit includes a rectifying circuit, a first resistor, and a third field effect transistor;
one end of the first resistor is connected with one end of the second coil, and the rectifying circuit is connected between one end of the second coil and one end of the first resistor;
the other end of the first resistor is connected with the drain electrode of the third field effect transistor, and the source electrode of the third field effect transistor is connected with the other end of the second coil;
and the drain electrode of the third field effect tube is connected with the output end of the ASK modulation circuit.
8. The circuit for a pulse generator according to claim 7, wherein the rectifying circuit includes a diode and a third capacitor;
the anode of the diode is connected with one end of the second coil and the source of the third field effect transistor respectively, and the cathode of the diode is connected with one end of the third capacitor and one end of the first resistor respectively;
the other end of the third capacitor is connected with the source electrode of the third field effect transistor.
9. A pulse generator comprising a circuit for a pulse generator according to any one of claims 1 to 8.
10. A deep brain electrical stimulation system comprising a pulse generator of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911424100.6A CN113117229A (en) | 2019-12-31 | 2019-12-31 | Circuit for pulse generator, pulse generator and deep brain electrical stimulation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911424100.6A CN113117229A (en) | 2019-12-31 | 2019-12-31 | Circuit for pulse generator, pulse generator and deep brain electrical stimulation system |
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| CN113117229A true CN113117229A (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911424100.6A Pending CN113117229A (en) | 2019-12-31 | 2019-12-31 | Circuit for pulse generator, pulse generator and deep brain electrical stimulation system |
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| Country | Link |
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| CN (1) | CN113117229A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116236691A (en) * | 2023-03-17 | 2023-06-09 | 上海杉翎医疗科技有限公司 | Implantable stimulation systems, methods, computer devices, and storage media |
| TWI824667B (en) * | 2021-09-03 | 2023-12-01 | 精能醫學股份有限公司 | Electrical stimulation device and electrical stimulation system |
-
2019
- 2019-12-31 CN CN201911424100.6A patent/CN113117229A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI824667B (en) * | 2021-09-03 | 2023-12-01 | 精能醫學股份有限公司 | Electrical stimulation device and electrical stimulation system |
| CN116236691A (en) * | 2023-03-17 | 2023-06-09 | 上海杉翎医疗科技有限公司 | Implantable stimulation systems, methods, computer devices, and storage media |
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