CN205647489U - AI device and galvanic isolation circuit with galvanic isolation circuit - Google Patents
AI device and galvanic isolation circuit with galvanic isolation circuit Download PDFInfo
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- CN205647489U CN205647489U CN201521028568.0U CN201521028568U CN205647489U CN 205647489 U CN205647489 U CN 205647489U CN 201521028568 U CN201521028568 U CN 201521028568U CN 205647489 U CN205647489 U CN 205647489U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The utility model discloses a AI device and galvanic isolation circuit with galvanic isolation circuit, including supply circuit, CPU module, communication circuit and filtering and acquisition circuit, still include the galvanic isolation circuit, supply circuit supplies power for the AI device respectively, communication circuit is used for carrying on the communication between the control station of CPU module and DCS system, filtering and acquisition circuit are used for gathering on -the -spot signal to give the CPU module with on -the -spot signal transmission, galvanic isolation circuit connection is at filtering and acquisition circuit's input for keep apart the arrival current signal, export the magnitude of voltage after the isolation. The utility model has the advantages of simple structure, low cost, interference killing feature in the AI device in the improvement DCS system.
Description
Technical field
This utility model relates to DCS control system field, particularly relates to a kind of being provided with and is galvanically isolated the AI device of circuit and is galvanically isolated circuit.
Background technology
In DCS control system, it is the most universal that AI Analog input mModule uses.Many 4-20mA current input module can be used.When site environment is more severe, holding wire has many interference signals.In order to improve capacity of resisting disturbance and protection module.Signal input part is it is necessary to have isolate isolation features.It is generally to be first converted into voltage signal after channel sample circuit, then is allowed to isolating device and CPU isolation.Circuit includes AD sample circuit, current converter circuit, filter circuit etc..And needing to provide power supply for these parts, this circuit structure is complicated, and poor anti jamming capability.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, it is provided that a kind of being provided with is galvanically isolated the AI device of circuit and is galvanically isolated circuit, and the design directly carries out isolation processing to electric current at current input terminal.Use the design can improve AI device capacity of resisting disturbance and protection module in DCS system in the case of ensureing precision without damage.
A kind of it is provided with the AI device being galvanically isolated circuit, including power supply circuits, CPU module, telecommunication circuit and filtering and Acquisition Circuit, it is characterized in that: also include being galvanically isolated circuit, described power supply circuits respectively AI device is powered, described telecommunication circuit is for carrying out communication between CPU module and the control station of DCS system, described filtering and Acquisition Circuit are for collection site signal, and on-site signal is passed to CPU module, described being galvanically isolated is electrically connected to filtering and the input of Acquisition Circuit, for input current signal is isolated, export the magnitude of voltage after an isolation.
nullThe described circuit that is galvanically isolated includes the first amplifier A1、Second amplifier A2、First audion VT1、Second audion VT2、Controllable accurate source of stable pressure N1、Linear isolation element VC1 and some resistance and electric capacity，Negative pole and the reference edge of described controllable accurate source of stable pressure N1 are connected with the positive pole of signal input part respectively，The positive pole of controllable accurate source of stable pressure N1 electrically connects with the base stage of the second audion VT2 and one end of the 8th resistance R8 respectively，The emitter stage of the second audion VT2 and the other end of the 8th resistance R8 are connected with the negative pole of signal input part through the 6th resistance R6，The colelctor electrode of the second audion VT2 is connected with the positive pole of signal input part，The in-phase input end of the first amplifier A1 is connected with the negative pole of signal input part through the first resistance R1，The inverting input of the first amplifier A1 is connected with the negative pole of signal input part through the second resistance R2 and the 6th resistance R6，Connect between inverting input and the outfan of the first amplifier A1 and have the first electric capacity C1，First amplifier (outfan of A1 and the base stage electrical connection of the first audion VT1，The colelctor electrode of the first audion VT1 is connected with the negative pole of signal input part through the 6th resistance R6，The emitter stage of the first audion VT1 electrically connects through the first input end of the 7th resistance R7 with linear isolation element VC1，Second input of linear isolation element VC1 is connected with the positive pole of signal input part，First outfan of linear isolation element VC1 and the inverting input electrical connection of the first amplifier A1，Second outfan of linear isolation element VC1 and the in-phase input end electrical connection of the first amplifier A1，3rd outfan of linear isolation element VC1 and the in-phase input end electrical connection of the second amplifier (A2)，The 3rd output termination ground connection of linear isolation element VC1，4th outfan of linear isolation element VC1 and the inverting input electrical connection of the second amplifier A2，Connect between inverting input and the outfan of the second amplifier A2 and have the second electric capacity C2，It is parallel with the 9th resistance R9 on second electric capacity C2，The outfan output voltage of the second amplifier A2.
The positive terminals of power supply of the first amplifier A1 are connected with the positive pole of signal input part, and the power supply of the first amplifier A1 is born terminals and is connected with the negative pole of signal input part through the 6th resistance R6.
Described first amplifier A1 and the second amplifier A2) all use model be the high-operational amplifier of TLV2211.
Described first audion VT1 uses model to be the audion of 2N3906, and described second audion (VT2) uses model to be the audion of 2N3904.
Described controllable accurate source of stable pressure N1 uses model to be the source of stable pressure of TL431.
Described linear isolation element VC1 uses model to be the photoelectrical coupler of HCNR201.
It is provided with the first isolation circuit between described CPU module and filtering and Acquisition Circuit, between CPU module and telecommunication circuit, is provided with the second isolation circuit.
nullOne is galvanically isolated circuit，Including the first amplifier A1、Second amplifier A2、First audion VT1、Second audion VT2、Controllable accurate source of stable pressure N1、Linear isolation element VC1 and some resistance and electric capacity，Negative pole and the reference edge of described controllable accurate source of stable pressure N1 are connected with the positive pole of signal input part respectively，The positive pole of controllable accurate source of stable pressure N1 electrically connects with the base stage of the second audion VT2 and one end of the 8th resistance R8 respectively，The emitter stage of the second audion VT2 and the other end of the 8th resistance R8 are connected with the negative pole of signal input part through the 6th resistance R6，The colelctor electrode of the second audion VT2 is connected with the positive pole of signal input part，The in-phase input end of the first amplifier A1 is connected with the negative pole of signal input part through the first resistance R1，The inverting input of the first amplifier A1 is connected with the negative pole of signal input part through the second resistance R2 and the 6th resistance R6，Connect between inverting input and the outfan of the first amplifier A1 and have the first electric capacity C1，The outfan of the first amplifier A1 and the base stage electrical connection of the first audion VT1，The colelctor electrode of the first audion VT1 is connected with the negative pole of signal input part through the 6th resistance R6，The emitter stage of the first audion VT1 electrically connects through the first input end of the 7th resistance R7 with linear isolation element VC1，Second input of linear isolation element VC1 is connected with the positive pole of signal input part，First outfan of linear isolation element VC1 and the inverting input electrical connection of the first amplifier A1，Second outfan of linear isolation element VC1 and the in-phase input end electrical connection of the first amplifier A1，3rd outfan of linear isolation element VC1 and the in-phase input end electrical connection of the second amplifier A2，The 3rd output termination ground connection of linear isolation element VC1，4th outfan of linear isolation element VC1 and the inverting input electrical connection of the second amplifier A2，Connect between inverting input and the outfan of the second amplifier A2 and have the second electric capacity C2，It is parallel with the 9th resistance R9 on second electric capacity C2，The outfan output voltage of the second amplifier A2.
The positive terminals of power supply of the first amplifier A1 are connected with the positive electrical of signal input part, and the power supply of the first amplifier A1 is born terminals and is connected with the negative pole of signal input part through the 6th resistance R6.
The beneficial effects of the utility model:
Owing to have employed such scheme, being galvanically isolated circuit owing to filtering of the present utility model and Acquisition Circuit are provided with, be galvanically isolated circuit and current signal is carried out isolation processing, the signal being allowed to filtering and Acquisition Circuit collection is all the circuit after isolating.Have employed the AI input module of this circuit to efficiently avoid affected by field apparatus by being galvanically isolated circuit, on the basis of ensureing precision and stability, improve in DCS system capacity of resisting disturbance and protection module in AI device be not damaged by.
The positive terminals of power supply of the first amplifier A1 are connected with the positive electrical of signal input part, and the power supply of the first amplifier A1 is born terminals and is connected with the negative electricity of signal input part.Additional power source can be need not, directly current signal is carried out isolation processing by being galvanically isolated circuit.
Accompanying drawing explanation
Fig. 1 is the theory diagram of AI device of the present utility model；
Fig. 2 is the circuit diagram being galvanically isolated circuit of the present utility model；
Fig. 3 is that this utility model is galvanically isolated schematic block circuit diagram.
Detailed description of the invention
The utility model is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.
See shown in Fig. 1, Fig. 2 and Fig. 3 a kind of is provided with the AI device being galvanically isolated circuit, including power supply circuits, CPU module, telecommunication circuit, filtering and Acquisition Circuit be galvanically isolated circuit, described power supply circuits electrically connect with CPU module, telecommunication circuit, filtering and Acquisition Circuit respectively, power supply circuits respectively AI device is powered, the input/output terminal of telecommunication circuit electrically connects with the input/output terminal of CPU module, described telecommunication circuit is for carrying out communication between CPU module and the control station of DCS system, telecommunication circuit is by the circuit of communication.By telecommunication circuit, CPU can communicate with control station.The core of telecommunication circuit is the communication chip used, such as SP485 etc..Filtering and the outfan of Acquisition Circuit electrically connect with the input of CPU module, described filtering and Acquisition Circuit are for collection site signal, and on-site signal is passed to CPU module, the described outfan of circuit that is galvanically isolated is at filtering and the input of Acquisition Circuit, it is galvanically isolated circuit and current signal is carried out isolation processing, exporting the magnitude of voltage after an isolation, the signal being allowed to filtering and Acquisition Circuit collection is all the circuit after isolating.Described filtering and Acquisition Circuit include filter circuit and sample circuit, described filter circuit and sample circuit are arranged on and are galvanically isolated between circuit and CPU module, it is galvanically isolated circuit to be connected with the input of filter circuit, the outfan of described filter circuit is connected with the input of sample circuit, and the outfan of described sample circuit is connected with CPU module.Sample circuit ordinary circumstance is A/D convertor circuit, if CPU module carries AD conversion function, filtering the most of the present utility model and Acquisition Circuit without arranging A/D convertor circuit.Filter circuit is that the noise etc. filtered in signal disturbs.This utility model AI input module is used to efficiently avoid affected by field apparatus by being galvanically isolated circuit.Described CPU module connects EEPROM access circuit, can preserve some and arrange parameter.Being provided with the second isolation circuit between CPU module and telecommunication circuit, it connects 485 buses of outside, while connecting the isolation circuit on limit.Being provided with the first isolation circuit between described CPU module and filtering and Acquisition Circuit, described first isolation circuit is for the isolation between CPU module and filtering and Acquisition Circuit.
One is galvanically isolated circuit, including the first amplifier A1, the second amplifier A2, the first audion VT1, the second audion VT2, controllable accurate source of stable pressure N1, linear isolation element VC1 and some resistance and electric capacity, the negative pole (pin 1) of described controllable accurate source of stable pressure N1 and reference edge (pin 3) respectively with the positive pole (Vin of signal input part+) connect, the positive pole (pin 2) of controllable accurate source of stable pressure N1 electrically connects with the base stage of the second audion VT2 and one end of the 8th resistance R8 respectively, the emitter stage of the second audion VT2 and the other end of the 8th resistance R8 are connected with the negative pole (Vin-) of signal input part through the 6th resistance R6, the colelctor electrode of the second audion VT2 and the positive pole (Vin of signal input part+null) connect，The in-phase input end (pin 1) of the first amplifier A1 is connected with the negative pole (Vin-) of signal input part through the first resistance R1，The inverting input (pin 3) of the first amplifier A1 is connected with the negative pole (Vin-) of signal input part through the second resistance R2 and the 6th resistance R6，Connect between inverting input (pin 3) and the outfan of the first amplifier A1 and have the first electric capacity C1，The outfan (pin 4) of the first amplifier A1 electrically connects with the base stage of the first audion VT1，The colelctor electrode of the first audion VT1 is connected with the negative pole (Vin-) of signal input part through the 6th resistance R6，The emitter stage of the first audion VT1 electrically connects through the first input end (pin 1) of the 7th resistance R7 and linear isolation element VC1，Second input (pin 2) of linear isolation element VC1 and the positive pole (Vin of signal input part+) connect, the first outfan GND of linear isolation element VC1-null(pin 3) electrically connects with the inverting input (pin 3) of the first amplifier A1，The second outfan PD1+(pin 4 of linear isolation element VC1) electrically connect with the in-phase input end (pin 1) of the first amplifier A1，3rd outfan (pin 5) of linear isolation element VC1 electrically connects with the in-phase input end (pin 1) of the second amplifier A2，The 3rd output termination ground connection GND of linear isolation element VC1，4th outfan (pin 6) of linear isolation element VC1 electrically connects with the inverting input (pin 3) of the second amplifier A2，Connect between inverting input (pin 3) and the outfan (pin 4) of the second amplifier A2 and have the second electric capacity C2，It is parallel with the 9th resistance R9 on second electric capacity C2，Outfan (pin 4) output voltage of the second amplifier A2.Output voltage (VOUT1) is connected with the input of filtering and Acquisition Circuit.
The positive terminals of power supply (pin 5) of the first amplifier A1 and the positive pole (Vin of signal input part+) connect, the power supply of the first amplifier A1 is born terminals (pin 2) and is connected with the negative pole (Vin-) of signal input part through the 6th resistance R6.
Described first amplifier A1 and the second amplifier A2) all use model be the high-operational amplifier of TLV2211.
Described first audion VT1 uses model to be the audion of 2N3906, and described second audion VT2 uses model to be the audion of 2N3904.
Described controllable accurate source of stable pressure N1 uses model to be the source of stable pressure of TL431.
Described linear isolation element VC1 uses model to be the photoelectrical coupler of HCNR201.
Operation principle of the present utility model:
Controllable accurate source of stable pressure N1 two ends exportable 2.5v voltage in this example, controllable accurate source of stable pressure N1, the circuit of the 8th resistance R8 and the second audion VT2 composition can make the second audion VT2 collector and emitter two ends have 3.3V voltage, this voltage provides supply voltage to the pin 5 of the first amplifier A1 and pin 2. from the pin 3 of linear isolation element VC1 with draw feedback signal that 4 feet come (linear isolation element is corresponding to the pin 1 of input and the feedback signal of pin 2) and be added to the input of the first amplifier A1, obtain signal by the 6th resistance R6 from loop simultaneously and be also added to input, can ensure that the stability of loop current occurs in loop when unexpected electric current is excessive simultaneously, output signal allows the first audion VT1 close. thus protection circuit.
The rfpa output signal of linear isolation element VC1 is added to in-phase input end and the inverting input of the second amplifier A2, after a mutual conductance amplifying circuit.Voltage after the outfan of the second amplifier A2 obtains the amplification of a relative input current, output to subsequent conditioning circuit.Second electric capacity C2 enhances the stability of output circuit.This utility model is applicable to defeated for the signal of electric current, input is carried out isolation amplify.
Principle of the present utility model is first to be galvanically isolated, then is amplified computing.
Shown in Figure 3, electric current inputs from left end, exports the magnitude of voltage of a corresponding isolation after current after being galvanically isolated circuit from right-hand member.
This utility model is not limited solely to above-described embodiment, carries out the technical scheme of few modifications in the case of without departing substantially from technical solutions of the utility model spirit, should fall into protection domain of the present utility model.
Claims (10)
1. one kind is provided with the AI device being galvanically isolated circuit, including power supply circuits, CPU module, telecommunication circuit and filtering and Acquisition Circuit, it is characterized in that: also include being galvanically isolated circuit, described power supply circuits respectively AI device is powered, described telecommunication circuit is for carrying out communication between CPU module and the control station of DCS system, described filtering and Acquisition Circuit are for collection site signal, and on-site signal is passed to CPU module, described being galvanically isolated is electrically connected to filtering and the input of Acquisition Circuit, for input current signal is isolated, export the magnitude of voltage after an isolation.
nullThe most according to claim 1 it is provided with the AI device being galvanically isolated circuit，It is characterized in that: described in be galvanically isolated circuit and include the first amplifier (A1)、Second amplifier (A2)、First audion (VT1)、Second audion (VT2)、Controllable accurate source of stable pressure (N1)、Linear isolation element (VC1) and some resistance and electric capacity，Negative pole and the reference edge of described controllable accurate source of stable pressure (N1) are connected with the positive pole of signal input part respectively，The positive pole of controllable accurate source of stable pressure (N1) electrically connects with the base stage of the second audion (VT2) and one end of the 8th resistance (R8) respectively，The emitter stage of the second audion (VT2) and the other end of the 8th resistance (R8) are connected with the negative pole of signal input part through the 6th resistance (R6)，The colelctor electrode of the second audion (VT2) is connected with the positive pole of signal input part，The in-phase input end of the first amplifier (A1) is connected with the negative pole of signal input part through the first resistance (R1)，The inverting input of the first amplifier (A1) is connected with the negative pole of signal input part through the second resistance (R2) and the 6th resistance (R6)，Connect between inverting input and the outfan of the first amplifier (A1) and have the first electric capacity (C1)，The outfan of the first amplifier (A1) and the base stage electrical connection of the first audion (VT1)，The colelctor electrode of the first audion (VT1) is connected with the negative pole of signal input part through the 6th resistance (R6)，The emitter stage of the first audion (VT1) electrically connects with the first input end of linear isolation element (VC1) through the 7th resistance (R7)，Second input of linear isolation element (VC1) is connected with the positive pole of signal input part，First outfan of linear isolation element (VC1) and the inverting input electrical connection of the first amplifier (A1)，Second outfan of linear isolation element (VC1) and the in-phase input end electrical connection of the first amplifier (A1)，3rd outfan of linear isolation element (VC1) and the in-phase input end electrical connection of the second amplifier (A2)，3rd output termination ground connection of linear isolation element (VC1)，4th outfan of linear isolation element (VC1) and the inverting input electrical connection of the second amplifier (A2)，Connect between inverting input and the outfan of the second amplifier (A2) and have the second electric capacity (C2)，The 9th resistance (R9) it is parallel with on second electric capacity (C2)，The outfan output voltage of the second amplifier (A2).
The most according to claim 1 it is provided with the AI device being galvanically isolated circuit, it is characterized in that: the positive terminals of power supply of the first amplifier (A1) are connected with the positive pole of signal input part, the power supply of the first amplifier (A1) is born terminals and is connected with the negative pole of signal input part through the 6th resistance (R6).
The most according to claim 2 it is provided with the AI device being galvanically isolated circuit, it is characterised in that: described first amplifier (A1) and the second amplifier (A2) all use model to be the high-operational amplifier of TLV2211.
The most according to claim 2 it is provided with the AI device being galvanically isolated circuit, it is characterised in that: described first audion (VT1) uses model to be the audion of 2N3906, and described second audion (VT2) uses model to be the audion of 2N3904.
The most according to claim 2 it is provided with the AI device being galvanically isolated circuit, it is characterised in that: described controllable accurate source of stable pressure (N1) uses model to be the source of stable pressure of TL431.
The most according to claim 2 it is provided with the AI device being galvanically isolated circuit, it is characterised in that: described linear isolation element (VC1) uses model to be the photoelectrical coupler of HCNR201.
The most according to claim 1 it is provided with the AI device being galvanically isolated circuit, it is characterised in that: it is provided with the first isolation circuit between described CPU module and filtering and Acquisition Circuit, between CPU module and telecommunication circuit, is provided with the second isolation circuit.
null9. one kind is galvanically isolated circuit，It is characterized in that: include the first amplifier (A1)、Second amplifier (A2)、First audion (VT1)、Second audion (VT2)、Controllable accurate source of stable pressure (N1)、Linear isolation element (VC1) and some resistance and electric capacity，Negative pole and the reference edge of described controllable accurate source of stable pressure (N1) are connected with the positive pole of signal input part respectively，The positive pole of controllable accurate source of stable pressure (N1) electrically connects with the base stage of the second audion (VT2) and one end of the 8th resistance (R8) respectively，The emitter stage of the second audion (VT2) and the other end of the 8th resistance (R8) are connected with the negative pole of signal input part through the 6th resistance (R6)，The colelctor electrode of the second audion (VT2) is connected with the positive pole of signal input part，The in-phase input end of the first amplifier (A1) is connected with the negative pole of signal input part through the first resistance (R1)，The inverting input of the first amplifier (A1) is connected with the negative pole of signal input part through the second resistance (R2) and the 6th resistance (R6)，Connect between inverting input and the outfan of the first amplifier (A1) and have the first electric capacity (C1)，The outfan of the first amplifier (A1) and the base stage electrical connection of the first audion (VT1)，The colelctor electrode of the first audion (VT1) is connected with the negative pole of signal input part through the 6th resistance (R6)，The emitter stage of the first audion (VT1) electrically connects with the first input end of linear isolation element (VC1) through the 7th resistance (R7)，Second input of linear isolation element (VC1) is connected with the positive pole of signal input part，First outfan of linear isolation element (VC1) and the inverting input electrical connection of the first amplifier (A1)，Second outfan of linear isolation element (VC1) and the in-phase input end electrical connection of the first amplifier (A1)，3rd outfan of linear isolation element (VC1) and the in-phase input end electrical connection of the second amplifier (A2)，3rd output termination ground connection of linear isolation element (VC1)，4th outfan of linear isolation element (VC1) and the inverting input electrical connection of the second amplifier (A2)，Connect between inverting input and the outfan of the second amplifier (A2) and have the second electric capacity (C2)，The 9th resistance (R9) it is parallel with on second electric capacity (C2)，The outfan output voltage of the second amplifier (A2).
The most according to claim 9 it is galvanically isolated circuit, it is characterized in that: the positive terminals of power supply of the first amplifier (A1) are connected with the positive electrical of signal input part, the power supply of the first amplifier (A1) is born terminals and is connected with the negative pole of signal input part through the 6th resistance (R6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521028568.0U CN205647489U (en) | 2015-12-14 | 2015-12-14 | AI device and galvanic isolation circuit with galvanic isolation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521028568.0U CN205647489U (en) | 2015-12-14 | 2015-12-14 | AI device and galvanic isolation circuit with galvanic isolation circuit |
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| Publication Number | Publication Date |
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| CN205647489U true CN205647489U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521028568.0U Withdrawn - After Issue CN205647489U (en) | 2015-12-14 | 2015-12-14 | AI device and galvanic isolation circuit with galvanic isolation circuit |
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| CN (1) | CN205647489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763183A (en) * | 2015-12-14 | 2016-07-13 | 重庆川仪自动化股份有限公司 | AI module provided with current isolation circuit, and current isolation circuit |
-
2015
- 2015-12-14 CN CN201521028568.0U patent/CN205647489U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763183A (en) * | 2015-12-14 | 2016-07-13 | 重庆川仪自动化股份有限公司 | AI module provided with current isolation circuit, and current isolation circuit |
| CN105763183B (en) * | 2015-12-14 | 2018-08-03 | 重庆川仪自动化股份有限公司 | Equipped with the AI modules for being galvanically isolated circuit and it is galvanically isolated circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161012 Effective date of abandoning: 20180803 |
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| AV01 | Patent right actively abandoned |