CN202014236U - Input/output isolation module - Google Patents
Input/output isolation module Download PDFInfo
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- CN202014236U CN202014236U CN2011200508523U CN201120050852U CN202014236U CN 202014236 U CN202014236 U CN 202014236U CN 2011200508523 U CN2011200508523 U CN 2011200508523U CN 201120050852 U CN201120050852 U CN 201120050852U CN 202014236 U CN202014236 U CN 202014236U
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Abstract
The utility model provides an input/output isolation module which comprises an input modulation circuit, an output demodulation circuit, an output voltage/current converting circuit, an output current/voltage converting circuit, an input power supply circuit, an output power supply circuit, an isolation power supply circuit and a reference power supply circuit, wherein the input modulation circuit is used for modulating voltage/current signals inputted from outside, the output demodulation circuit is used for demodulating the inputted voltage/current signals, the output voltage/current converting circuit and the output current/voltage converting circuit are respectively used for converting the demodulated voltage/current signals into the current/voltage signals and outputting the current/voltage signals, the input power supply circuit is used for supplying power to the input modulation circuit, the output power supply circuit is used for supplying power to the output demodulation circuit, the voltage/current converting circuit and the current/voltage converting circuit, the isolation power supply circuit is used for providing voltage isolated from external general power for the input power supply circuit or the output power supply circuit, and the reference power supply circuit is used for providing stabilized voltage for the isolation power supply circuit, the input power supply circuit or the output power supply circuit, so that selection between input and output is realized, and high-level electrical isolation between input and output is provided.
Description
Technical field
The utility model relates to a kind of isolation module, is meant a kind of I/O isolation module especially.
Background technology
Between electric equipment altogether, be easy to generate ground circulation, make the situation that occurs the phase mutual interference between the various device.Usually, the method that addresses this is that is by an isolation module is set between described equipment, with the electrical isolation between the realization equipment, solves and disturbs.
Between the various device in nuclear power plant system, need be provided with one that can select to input or output, and can between input and output, provide the isolation module of high degree of electrical isolation.
The utility model content
In view of this, main purpose of the present utility model is to provide a kind of I/O isolation module, with the selection that realizes inputing or outputing, and provides the electricity of height to isolate between input and output.
A kind of I/O isolation module that the utility model provides is characterized in that, comprising:
Output voltage translation circuit 30 is connected with output demodulator circuit 20, is used for demodulated voltage signal is converted to current signal and output;
Output current/voltage conversion circuit 40 is connected with output demodulator circuit 20, is used for demodulated current signal is converted to voltage signal and output;
Output power supply circuit 60 is connected with output demodulator circuit 20, is used to output modulation circuit 20, voltage/current translation circuit and current/voltage/translation circuit power supply;
Insulating power supply circuit 70 is connected with input power circuit 50 or output power supply circuit 60, is used to input power circuit 50 or output power supply circuit 60 that the voltage of isolating with outside general supply is provided;
Reference power source circuit 80 is connected with insulating power supply circuit 70, and is connected with outside general supply, is used to insulating power supply circuit 70, input power circuit 50 or output power supply circuit 60 that stable voltage is provided.
Above-mentioned I/O isolation module is characterized in that, also comprises:
The clock circuit 90, circuits for triggering 100 and the overvoltage crowbar 110 that between the input of described input modulation circuit 10 and output, are connected successively.
Above-mentioned I/O isolation module is characterized in that, also comprises the overvoltage crowbar 120 that is connected with described output demodulator circuit 20.
Above-mentioned I/O isolation module is characterized in that, also comprises: be connected with overvoltage crowbar 130 between the input of described output voltage change-over circuit 30 and output.
Above-mentioned I/O isolation module is characterized in that, also comprises: the voltage follower circuit 140 that is connected successively between the input of described output current/voltage conversion circuit 40 and output, overvoltage crowbar 150,160.
Above-mentioned I/O isolation module is characterized in that, also comprises: the voltage stabilizing circuit 170 that is connected successively between the input of described input power circuit 50 and output, overvoltage crowbar 180,190.
Above-mentioned I/O isolation module is characterized in that, also comprises: the voltage stabilizing circuit 200 that is connected successively between the input of described output power supply circuit 60 and output, overvoltage crowbar 210,220.
Above-mentioned I/O isolation module is characterized in that, described insulating power supply circuit 70 comprises:
Chopper circuit 71 is used for voltage stabilizing and regulates;
Current rectifying and wave filtering circuit 72 is used to export the voltage of isolating with outside general supply.
Above-mentioned I/O isolation module is characterized in that, also comprises: the overvoltage crowbar 230 and the filter circuit 240 that are connected successively between the input of described insulating power supply circuit 70 and output.
Above-mentioned I/O isolation module is characterized in that, also comprises: the overvoltage crowbar 250 that is connected with described reference power source circuit 80.
As seen from the above, utility model can realize the selection that inputs or outputs, and can provide the electricity of height to isolate between input and output.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of I/O isolation module of the utility model;
Fig. 2 is the input modulation circuit figure of a kind of I/O isolation module of the utility model;
Fig. 3 is the signal waveforms of the input modulation circuit of a kind of I/O isolation module of the utility model;
Fig. 4 is the output demodulator circuit figure of a kind of I/O isolation module of the utility model;
Fig. 5 is the signal waveforms of the output demodulator circuit of a kind of I/O isolation module of the utility model;
Fig. 6 is the output voltage translation circuit figure of a kind of I/O isolation module of the utility model;
Fig. 7 is the output current/voltage conversion circuit figure of a kind of I/O isolation module of the utility model;
Fig. 8 is the input power circuit diagram of a kind of I/O isolation module of the utility model;
Fig. 9 is the output power supply circuit figure of a kind of I/O isolation module of the utility model;
Figure 10 is the reference power source circuit diagram of a kind of I/O isolation module of the utility model;
Figure 11 is the insulating power supply circuit diagram of a kind of I/O isolation module of the utility model;
Figure 12 is that a kind of I/O isolation module of the utility model is realized the winding diagram that input is isolated;
Figure 13 is that a kind of I/O isolation module of the utility model is realized the winding diagram that output is isolated;
Figure 14 is the winding diagram that a kind of I/O isolation module of the utility model is realized voltage input, electric current output mode;
Figure 15 is the winding diagram that a kind of I/O isolation module of the utility model is realized electric current input, voltage output mode.
Embodiment
Below in conjunction with accompanying drawing, a kind of I/O isolation module that the utility model provides is at length introduced.
As shown in Figure 1, a kind of I/O isolation module that the utility model provides is mainly by input modulation circuit 10, the output demodulator circuit 20 that is connected with the input modulation circuit, the output voltage translation circuit 30 and the output current/voltage conversion circuit 40 that are connected with output demodulator circuit 20, the input power circuit 50 that is connected with input modulation circuit 10, the output power supply circuit 60 that is connected with output demodulator circuit 20, with insulating power supply circuit 70 and reference power source circuit 80 that input power circuit 50 or output power supply circuit 60 are connected, wherein reference power source circuit 80 is connected with outside general supply.Need to prove that the circuit among Fig. 1 in the foregoing circuit various piece only shows main devices, specifically each part can be referring to other circuit diagrams.Wherein:
Output voltage translation circuit 30 is used for demodulated voltage signal is converted to current signal and output.Current signal scope after conversion is 4～20mA.
Output current/voltage conversion circuit 40 is used for demodulated current signal is converted to voltage signal and output.Through the conversion after the voltage signal scope be+1～+ 5V.
Output power supply circuit 60 is used to output modulation circuit 20, the power supply of voltage/current translation circuit and current/voltage/translation circuit, and it is isolated with input power circuit 50 mutual electricity.
Insulating power supply circuit 70 is used to input power circuit 50 or output power supply circuit 60 that the 28V voltage of isolating with outside general supply is provided.
Reference power source circuit 80 is used to insulating power supply circuit 70 that 18V is provided voltage, provides 28V voltage for importing power circuit 50 or output power supply circuit 60.
Below in conjunction with accompanying drawing the utility model is further described.
I/O of the present utility model is isolated, mainly be by the capacitive coupling between input modulation circuit 10 and the output demodulator circuit 20, and independent power supply separately (input power circuit 50 and output power supply circuit 60) is realized.
The 10 main modulation that realize input signal by comparison amplifier A5 of input modulation circuit.In addition, between input and the output of input modulation circuit 10, be connected with a clock circuit 90 of connecting and constituting in turn by logical circuit A4-1 and A4-2; Circuits for triggering 100 that constitute by logical circuit A4-3 and A4-4 series connection; And the overvoltage crowbar 110 that constitutes by thermistor R47 and R48 parallel connection.
Particularly, as Fig. 2, shown in Figure 3, the clock pulse output signal of sending when the clock circuit 1. from high level when low level changes (only when 1. the clock pulse output signal changes, its variation could send through capacitor C 22), logical circuit A4-3 receives a low level (the circuits for triggering input signal 2.) at its input 6 (one of input of circuits for triggering), then at high level of its output (logical circuit A4-3 output 4) output.Work like that with similar short circuit by capacitor C 23, high level is sent to the input 1,2 of logical circuit A4-4.The output 3 of logical circuit A4-4 sends the input 5 of a low level signal to logical circuit A4-3.When the variation 1. of clock pulse output signal stopped, the input 6 of logical circuit A4-3 reset to high level, and still, because the input 5 of logical circuit A4-3 is a low level, so circuits for triggering still are in original state.Simultaneously, by the high level that the input 4 of logical circuit A4-3 is exported, be capacitor C 27 chargings.By resistance R 42 and transistor Q5, be capacitor C 23 chargings (electric current of Q5 is through the output signal modulation of amplifying circuit).When being capacitor C 23 chargings, the current potential between the input 1 and 2 of logical circuit A4-4 just descends.When this current potential drops to the transposition current potential 3. the time, the input and output signal of logical circuit A4-4 is reverse.At this moment, the input 5 and 6 of logical circuit A4-3 all receives high level signal, so its output 4 places low level, promptly 4. output signal is low level signal.The change in voltage speed that is added to logical circuit A4-4 input 1 and 2 depends on the charging current of capacitor C 23, the i.e. electric current of transistor Q5.Because the electric current of Q5 is via the output signal modulation of amplifying circuit, the pulse duration on the logical circuit A4-3 output 4 like this determined the voltage at capacitor C 27 two ends, so the mean value of described output signal equals input signal at any time.That is, through the output signal of amplifying circuit (comparison amplifier A5) modulation at any time, its mean value remains on a voltage that equates with the input signal at capacitor C 27 two ends.Therefore, the pulse duration at the output of importing modulation circuit 10 depends on described input signal.
As shown in Figure 2, be voltage signal for input signal, jumper K1 is not installed, directly voltage signal is added to the input of comparison amplifier A5, promptly finish the voltage/current conversion shown in Figure 14; For input signal is current signal, needs jumper K1 is installed, and promptly finishes current/voltage-converted as shown in Figure 15.This current signal forms a voltage drop at the two ends of measuring resistance RM, and this voltage drop is added to the input of comparison amplifier A5.
In addition, the overvoltage crowbar (thermistor R47 and R48) of input in the modulation circuit 10 can be used for preventing being added to the measuring resistance RM overvoltage of the input of comparison amplifier A5.Capacitor C 21 is isolated input modulation circuit 10 and output demodulator circuit 20.By the electric current of test jack measuring resistance R50, just can measure the size of input current thus.
Input signal after 10 modulation of input modulation circuit is sent to output demodulator circuit 20 by capacitive coupling (capacitor C 21 is coupled with capacitor C 17, the C20 shown in Fig. 4).At described input signal by low level to the high level transition period, as shown in Figure 4, the input 12 and 13 of logical circuit A3-1, and the input 8 of logical circuit A3-2 receives high level signal.The input 1 of logical circuit A3-3 receives low level signal, and its output 3 places are high level signal.
Described input signal by low level behind the high level EOC, the input 12 and 13 of logical circuit A3-1 resets to low level, and the input 8 of logical circuit A3-2 keeps high level.(provide through connection jaws VS by output power supply circuit 60, to introduce hereinafter) be added to the signal of telecommunication of logical circuit A3-2 input 8 and 9, by resistance R 25, keep high level, its output 10 is a low level, and the input 3 of logical circuit A3-3 keeps high level simultaneously.
In said process, when described input signal was high level signal, what logical circuit A3-3 output 3 was exported also was high level signal, and by resistance R 34-1 capacitor C 16 is loaded.
Described input signal by high level during low transition, the input 12 and 13 of logical circuit A3-1, and the input 8 of logical circuit A3-2 receives low level signal, and (1. Fig. 5 shows the input 12 of logical circuit A3-1 and 13 waveform input signal, and the waveform input signal of the input 8 of logical circuit A3-2 2.), the input 1 and 2 of A3-3 receives high level signal, then its output 3 output low level signals.
Described input signal by high level after low transition finishes, be added to the signal of telecommunication at input 8 places of logical circuit A3-2 by connection jaws VS, remain on high level by resistance R 25, the input 12 of logical circuit A3-1 and 13 remains on low level by resistance R 38, the input 1 of logical circuit A3-3 and 2 is a high level, and its output 3 is a low level.
In said process, when described input signal was level signal, the output signal of logical circuit A3-3 also was a low level signal, and capacitor C 16 is by resistance R 34-1 discharge.About each logical circuit I/O end high-low level transition status in the output demodulator circuit, can be referring to the signal waveform of the output demodulator circuit shown in table 1 and Fig. 5.
Each logical circuit I/O end high-low level transition status table in the table 1. output demodulator circuit
(L: low level, H: high level)
Therefore, it is relevant with the pulse duration of described input signal to be added in the voltage effective value at C16 two ends.
In addition; between the input and output of output demodulator circuit 20; be connected with an overvoltage crowbar 120 that constitutes by mutual diode connected in parallel D17 and D20, be used for the voltage that restriction is added to logical circuit A3-1 input 12,13 and logical circuit A3-2 input 8 places.Be specially: when the voltage at logical circuit A3-1 input 12,13 and logical circuit A3-2 input 8 places during less than the voltage at connection jaws+VS place, described diode D17 and D20 are inoperative; When the voltage at logical circuit A3-1 input 12,13 and logical circuit A3-2 input 8 places during greater than the voltage at connection jaws+VS place, described diode D17 and D20 conducting make unnecessary electric current lead away by resistance R 26 and R38.Capacitor C 17 and C20 isolate output demodulator circuit 20 and input modulation circuit 10.
Said process has been finished the input modulation of described input signal, and the output demodulation.Can pass through output voltage translation circuit 30 or output current/change in voltage circuit 40 below,, export after converting the curtage signal to described input signal (voltage or current signal).
As shown in Figure 6, the input of output voltage translation circuit 30 carries out the conversion of voltage to electric current by wherein comparison amplifier A2 after receiving output signal (voltage signal) from output demodulator circuit 20.Comparison amplifier A2 is after resistance group Ra control transformation, and the electric current of being exported by current output terminal is balance at any time.Described resistance group Ra is made up of resistance R 31, R32, potentiometer P1 and resistor network R34-1～R34-4, and is in parallel with resistance R 31 after wherein resistance R 32 is connected with potentiometer P1; Resistance R 34-3 is with after resistance R 34-4, resistance R 32, potentiometer P1 and resistance R 31 are connected, with the mutual resistance R 34-1 that connects, R34-2 parallel connection.Wherein, potentiometer P1 can accurately adjust resistance R a, comprises resistance error.Comparison amplifier A2 is except its gain is non-vanishing, and the voltage between its positive and negative input is almost nil.
In addition, by the potentiometer P2 in the output voltage translation circuit 30, can eliminate the offset voltage of comparison amplifier A2; Between input by being connected output voltage translation circuit 30 and the output, by mutual diode in series D18, the overvoltage crowbar 130 that D19 and thermistor R27 constitute can prevent the circuit overvoltage of current output terminal.Wherein, diode D18 can disconnect positive voltage, and diode D19 can be transmitted back to common zero point with negative voltage.Thermistor R27 can limit electric current.By the voltage drop at the test jack measuring resistance R28 two ends in the output voltage translation circuit 30, just can measure the size of output current thus.
As shown in Figure 7, the current input terminal of output current/voltage conversion circuit 40 receives the output signal (current signal) from output demodulator circuit 20, be converted to voltage signal by measuring resistance R13 after, export by voltage output end.Wherein, between the input of output current/voltage conversion circuit 40 and output, be connected with a voltage follower circuit 140 that constitutes by comparison amplifier A1, the input that is used at comparison amplifier A1 is under the situation of high impedance, at output output Low ESR, can keep the current signal imported constant thus.
In addition, by the overvoltage crowbar 150 that thermistor R12 constitutes, can prevent to be added to the measuring resistance R14 overvoltage of described current input terminal.Between the input and output of output current/voltage conversion circuit 40, by mutual diode in series D11; the overvoltage crowbar 160 that D12 and thermistor R17 constitute; can protect not overvoltage of comparison amplifier A1, this overvoltage may add from the output of comparison amplifier A1.Wherein, the positive overvoltage of diode D11 stage, diode D12 sends back common zero point with negative overpressure.Resistance R 17 restriction electric currents.By the electric current of test jack measuring resistance R11, just can measure the size of output voltage thus.
Finish after above-mentioned input, output signal isolation and the conversion, will introduce in detail below, be the connection situation between each power circuit of each circuit supply in the utility model to realizing described I/O isolation to input signal.
The bias voltage that reference power source circuit 80 as shown in Figure 10, the 28V voltage that outside general supply is sended over Zener diode D3, the D4 by resistance R 4 power supplies produces is added on the base stage of transistor Q1, and the emitter of transistor Q1 sends out 18V voltage.Wherein, between reference power source circuit 80 inputs and output, by the overvoltage crowbar 250 that mutual Zener diode D2 that connects and thermistor R2 constitute, be used for preventing the overvoltage that may apply by output power supply circuit 60.Diode D1 is used for preventing the incorrect link of reference power source circuit 80 and output power supply circuit 60.
Then, the 18V voltage that chopper circuit 71 in the insulating power supply circuit 70 as shown in Figure 11 will receive from reference power source circuit 80 carries out the voltage stabilizing adjusting, this voltage source is exported the 28V voltage of isolating with outside general supply through the secondary winding of transformer T1, through behind the rectifying and wave-filtering of current rectifying and wave filtering circuit 72 then.Wherein:
Described chopper circuit 71 is by the capacitor C 4, the C5 that connect on T1 winding of transformer one side, successively, and transistor Q2, Q3 constitute together.
Described current rectifying and wave filtering circuit 72 is followed in series to form with diode bridge D5-D8 and resistance R 9 after by capacitor C 8 and diode D9 parallel connection.
In addition, the resistance R 9 in the insulating power supply circuit 70 can prevent power supply short circuit; Constitute a filter circuit 240 after capacitor C 2, C3 and inductor L1 between the input of insulating power supply circuit 70 and output, by mutual parallel connection connect, the frequency noise that is used for limiting in the chopper circuit feeds back in the outside general supply.
As shown in figure 13, will import power circuit 50 and be connected with 28V reference power source circuit 80, output power supply circuit 60 is connected with insulating power supply circuit 70, can realize the output isolation.
As Fig. 8, shown in Figure 9, input power circuit 50 (by connection jaws VE output) and output power supply circuit 60 (by connection jaws VS output) for 10 power supplies of input modulation circuit for exporting demodulator circuit 20, output voltage change-over circuit 30 and 40 power supplies of output current/voltage conversion circuit, be two very similar, and the mutual electricity independent circuits of isolating.Wherein, input power circuit 50 is by by Zener diode D25, the D24 of parallel connection and the voltage stabilizing circuit 170 that constitutes after resistance R 52, R51 connects, and realization is to importing the dual voltage stabilizing of modulation circuit 10; Output power supply circuit 60 is realized the dual voltage stabilizing to output demodulator circuit 20, output voltage change-over circuit 30 and output current/voltage conversion circuit 40 by by Zener diode D14, the D15 of parallel connection and the voltage stabilizing circuit 200 that constitutes after resistance R 21, R22 connect.The overvoltage crowbar 180 that input power circuit 50 constitutes by resistance R 54 and Zener diode D23 by mutual series connection carries out overvoltage protection to the comparison amplifier A5 that imports modulation circuit 10; The overvoltage crowbar 210 that output power supply circuit 60 constitutes by resistance R 20 and Zener diode D16 by mutual series connection carries out overvoltage protection to the comparison amplifier A2 of output voltage translation circuit 30.
Described input power circuit 50 and output power supply circuit 60 are respectively by by the thermistor R53 of mutual series connection, overvoltage crowbar 190 that Zener diode D26 constitutes and the thermistor R19 of series connection each other, the overvoltage crowbar 220 that Zener diode D28 constitutes; prevent circuit overvoltage separately respectively, and the incorrect link of preventing stop polarity by series diode D27 and D13 respectively.
For output power supply circuit 60, it also is the transistor Q4 power supply of output voltage converter 30.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. an I/O isolation module is characterized in that, comprising:
Input modulation circuit (10) is used for voltage signal or current signal that modulated external is imported;
Output demodulator circuit (20) is connected with input modulation circuit (10), is used for described input voltage signal of demodulation or current signal, so that itself and noise range are separated;
Output voltage translation circuit (30) is connected with output demodulator circuit (20), is used for demodulated voltage signal is converted to current signal and output;
Output current/voltage conversion circuit (40) is connected with output demodulator circuit (20), is used for demodulated current signal is converted to voltage signal and output;
Input power circuit (50) is connected with input modulation circuit (10), is used to input modulation circuit (10) power supply;
Output power supply circuit (60) is connected with output demodulator circuit (20), is used to output modulation circuit (20), voltage/current translation circuit and current/voltage/translation circuit power supply;
Insulating power supply circuit (70) is connected with input power circuit (50) or output power supply circuit (60), is used to input power circuit (50) or output power supply circuit (60) that the voltage of isolating with outside general supply is provided;
Reference power source circuit (80) is connected with insulating power supply circuit (70), and is connected with outside general supply, is used to insulating power supply circuit (70), input power circuit (50) or output power supply circuit (60) that stable voltage is provided.
2. I/O isolation module according to claim 1 is characterized in that, also comprises:
The clock circuit (90), circuits for triggering (100) and the overvoltage crowbar (110) that between the input of described input modulation circuit (10) and output, are connected successively.
3. I/O isolation module according to claim 1 is characterized in that, also comprises the overvoltage crowbar (120) that is connected with described output demodulator circuit (20).
4. I/O isolation module according to claim 1 is characterized in that, also comprises: be connected with overvoltage crowbar (130) between the input of described output voltage change-over circuit (30) and output.
5. I/O isolation module according to claim 1; it is characterized in that; also comprise: the voltage follower circuit (140) that between the input of described output current/voltage conversion circuit (40) and output, is connected successively, overvoltage crowbar (150,160).
6. I/O isolation module according to claim 1 is characterized in that, also comprises: the voltage stabilizing circuit (170) that is connected successively between the input of described input power circuit (50) and output, overvoltage crowbar (180,190).
7. I/O isolation module according to claim 1 is characterized in that, also comprises: the voltage stabilizing circuit (200) that is connected successively between the input of described output power supply circuit (60) and output, overvoltage crowbar (210,220).
8. I/O isolation module according to claim 1 is characterized in that, described insulating power supply circuit (70) comprising:
Chopper circuit (71) is used for voltage stabilizing and regulates;
Current rectifying and wave filtering circuit (72) is used to export the voltage of isolating with outside general supply.
9. I/O isolation module according to claim 1 is characterized in that, also comprises: the overvoltage crowbar (230) and the filter circuit (240) that are connected successively between the input of described insulating power supply circuit (70) and output.
10. I/O isolation module according to claim 1 is characterized in that, also comprises: the overvoltage crowbar (250) that is connected with described reference power source circuit (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200508523U CN202014236U (en) | 2010-10-19 | 2011-02-28 | Input/output isolation module |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020576324.7 | 2010-10-19 | ||
| CN201020576324 | 2010-10-19 | ||
| CN2011200508523U CN202014236U (en) | 2010-10-19 | 2011-02-28 | Input/output isolation module |
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| Publication Number | Publication Date |
|---|---|
| CN202014236U true CN202014236U (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200508523U Expired - Fee Related CN202014236U (en) | 2010-10-19 | 2011-02-28 | Input/output isolation module |
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| CN (1) | CN202014236U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631227A (en) * | 2013-11-26 | 2014-03-12 | 中国广核集团有限公司 | Isolation method and isolation system |
| CN105573154A (en) * | 2014-10-17 | 2016-05-11 | 中核核电运行管理有限公司 | BDCDE2DI type signal I/O module of nuclear power station radiation monitoring system |
| CN108020792A (en) * | 2017-12-07 | 2018-05-11 | 荣湃半导体（上海）有限公司 | A kind of information detection and method |
-
2011
- 2011-02-28 CN CN2011200508523U patent/CN202014236U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631227A (en) * | 2013-11-26 | 2014-03-12 | 中国广核集团有限公司 | Isolation method and isolation system |
| CN103631227B (en) * | 2013-11-26 | 2017-02-08 | 中国广核集团有限公司 | Isolation method and isolation system |
| CN105573154A (en) * | 2014-10-17 | 2016-05-11 | 中核核电运行管理有限公司 | BDCDE2DI type signal I/O module of nuclear power station radiation monitoring system |
| CN108020792A (en) * | 2017-12-07 | 2018-05-11 | 荣湃半导体（上海）有限公司 | A kind of information detection and method |
| CN108020792B (en) * | 2017-12-07 | 2020-04-07 | 荣湃半导体（上海）有限公司 | Information detection circuit and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20150228 |
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