CN2794040Y - Isolated microcircuit module with double switches and thick membrane - Google Patents
Isolated microcircuit module with double switches and thick membrane Download PDFInfo
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- CN2794040Y CN2794040Y CN 200520078873 CN200520078873U CN2794040Y CN 2794040 Y CN2794040 Y CN 2794040Y CN 200520078873 CN200520078873 CN 200520078873 CN 200520078873 U CN200520078873 U CN 200520078873U CN 2794040 Y CN2794040 Y CN 2794040Y
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Abstract
The utility model discloses an optical isolation microcircuit module with double switches, which solves the problems of narrow operating temperature ranges, big size and low sensitivity of the existing electronic switches. The utility model comprises an in-phase proportion amplifying circuit, a voltage follower, a comparator and a switch circuit of the input and isolation output of reference voltage, wherein the in-phase proportion amplifying circuit is composed of a first operational amplifier, a concurrent input resistor, an inverse input resistor, a concurrent proportion feedback resistor and a feedback capacitor. The voltage follower is composed of an input resistor of a voltage follower and a second operational amplifier, and the inverse input end of the first operational amplifier is connected with the output end of the first operational amplifier by the voltage follower. The comparator is composed of a third operational amplifier, a comparison feedback resistor and a capacitor, and the switch circuit of the isolation output is composed of a first photoelectric coupler, a second photoelectric coupler, a first switch diode and a second switch diode. The utility model uses the assembly of multiple chips and the technique of nitrogen-filled parallel seam weld and has the advantages of small size, light weight and high reliability.
Description
Technical field:
The utility model relates to a kind of switching circuit, especially a kind of isolated form biswitch thick-film microcircuit module.
Background technology
At present, conventional electronic switch is of a great variety, but a lot of electronic switch volume is bigger, sensitivity is not high, and especially operating temperature range is narrower, in addition, existing switch is input and output common ground mostly, and under the occasion that some inputs and output need to isolate, this switch is also inapplicable.
The utility model content
The purpose of this utility model provides a kind of suitable isolated form biswitch thick-film microcircuit module under the occasion that needs to isolate with output of importing, and existing electronic switch operating temperature range is narrower to solve, volume is big, the not high problem of sensitivity.
The utility model comprises in-phase proportion amplifying circuit, voltage follower, comparator, reference voltage input, isolates output switch circuit D, the in-phase proportion amplifying circuit by first operational amplifier, in the same way input resistance, oppositely input resistance, Proportional Feedback resistance and first feedback capacity are formed in the same way; Voltage follower is made up of the voltage follower input resistance and second operational amplifier, and voltage follower connects together the inverting input and the output of first operational amplifier; Comparator is made up of the 3rd operational amplifier and comparison feedback resistance and electric capacity; Isolating output switch circuit D is made up of first photoelectrical coupler, second photoelectrical coupler, first switching diode, second switch diode; The output of in-phase proportion amplifying circuit is leaded up to the voltage follower input resistance and is linked to each other with the in-phase input end of voltage follower, another road links to each other with the in-phase input end of comparator by the comparator input resistance, and the output of comparator links to each other with the input of isolating output switch circuit D; Isolating first photoelectrical coupler of output switch circuit D connects with the input of second photoelectrical coupler, its output links to each other with first switching diode, second switch diode respectively, first switching diode links to each other with the first isolating switch output, and the second switch diode links to each other with the second isolating switch output.
The utility model is a kind of a kind of isolated form biswitch thick-film microcircuit module that adopts the thick film hybrid integration technology to produce, and its advantage mainly shows: substrate adopts 96% AL
2O
3Ceramic substrate, conductive coefficient is good, the intensity height; Conduction band, weld zone, resistance and medium all adopt the multilayer wiring film-forming process of printing and sintering, and adhesive force is good, and resistance is accurately adjustable, and the resistance value temperature is floated little, medium insulativity height; The part components and parts adopt the bare chip assembling, and the gold ball bonding bonding has so just improved the integrated level of circuit greatly; In addition, its packing forms is the full air-tight packaging of metal shell, and cavity contains 99.9% high pure nitrogen, guarantees that in the work or the process of storing inner each components and parts can not be subjected to the corrosion or the oxidation of other atmosphere.Therefore the isolated form biswitch thick-film microcircuit module of coming out with this explained hereafter has integrated level height, volume little (30.5 * 15.24 * 6mm * mm * mm), high temperature resistant (55 ℃～+ 125 ℃, and+150 ℃ of operating times can reach 5 minutes) and the high advantage of reliability.
The utility model is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a schematic diagram of the present utility model.
Embodiment
The utility model comprises in-phase proportion amplifying circuit A, voltage follower B, comparator C, reference voltage input, isolates output switch circuit D, in-phase proportion amplifying circuit A by the first operational amplifier IC3, in the same way input resistance R2, oppositely input resistance R1, Proportional Feedback resistance R 7 and the first feedback capacity C9 form in the same way; Voltage follower B connects together inverting input and the output of the first operational amplifier IC3; Comparator C is made up of the 3rd operational amplifier IC5, comparator input resistance R8, comparison feedback resistance R11 and electric capacity; Isolating output switch circuit D is made up of the first photoelectrical coupler IC1, the second photoelectrical coupler IC2, the first switching diode D1, second switch diode D2; Voltage follower B is made up of the voltage follower input resistance R3 and the second operational amplifier IC4.
Fig. 1 shows theory diagram of the present utility model, wherein imports amplifier section and realizes by in-phase proportion amplifying circuit A among Fig. 2; The simulation output is realized by voltage follower B among Fig. 2; The reference voltage input is a kind of external 2.5V benchmark, it can be realized by adjustable precision a reference source, external supply power voltage is received the negative electrode of adjustable precision a reference source, the plus earth of adjustable precision a reference source, the control utmost point of adjustable precision a reference source is received reference voltage (VK) end.Also can realize by external divider resistance, a divider resistance ground connection wherein, another divider resistance connects external supply power voltage, and the mid point of two resistance is received reference voltage (VK) end.Signal after wherein in-phase proportion amplifying circuit A amplifies is through accurate monitoring aanalogvoltage AG Vout of voltage follower B output, by the monitoring to this aanalogvoltage, can judge that switch is in the variable quantity of input voltage in the transfer process of Push And Release.The output of in-phase proportion amplifying circuit A and external 2.5V benchmark compare, and relatively conducting and the shutoff of the first isolating switch output K Vout1 and the second isolating switch output K Vout2 controlled in the output after.Operation principle of the present utility model is small and weak signal to be amplified, monitors and itself and accurate a reference source are compared by low noise high precision operating amplifier very, signal after amplifying is during greater than accurate benchmark, the output high level makes photoelectrical coupler work, promptly opens isolating switch.This product can work in the various adverse circumstances, and operating temperature range is wide :-55 ℃～+ 125 ℃ (+150 ℃ of operating times can reach 5 minutes).
Introduce circuit connecting mode of the present utility model in detail according to Fig. 2 below.
Positive input signal+VIN links to each other with 3 pin of the first operational amplifier IC3 through input resistance R2 in the same way, negative input signal-VIN one tunnel links to each other with 2 pin of the first operational amplifier IC3 through reverse input resistance R1, another road is by feedback resistance R7 and 6 pin of receiving the first operational amplifier IC3 after feedback capacity is in parallel, 6 pin of the first operational amplifier IC3 are leaded up to voltage follower input resistance R3 and are linked to each other with in-phase input end 3 pin of the second operational amplifier IC4, inverting input 2 pin and output 6 pin of the second operational amplifier IC4 connect together, and are output as aanalogvoltage AG Vout end simultaneously; Another road of 6 pin of the first operational amplifier IC3 links to each other with in-phase input end 3 pin of the 3rd operational amplifier IC5 by comparator input resistance R8, in-phase input end 3 pin of the 3rd operational amplifier IC5 are also received on the ground through an amplitude limit resistance R 9, meet a feedback resistance R11 simultaneously and between output 6 pin of the 3rd operational amplifier IC5.Inverting input 2 pin of the 3rd operational amplifier IC5 are received on the ground by a filter capacitor C12, receive output 6 pin of the 3rd operational amplifier IC5 simultaneously through the second feedback capacity C2, but also receive reference voltage V K end through an external benchmark current-limiting resistance R10.Output 6 pin of the 3rd operational amplifier IC5 link to each other with the input a that isolates output switch circuit D.The input a point of isolating output switch circuit D is through input resistance R4, then by being connected to the termination of positive voltage VCC1 after the first divider resistance R17 and the second divider resistance R12 dividing potential drop, simultaneously, this termination is connected to the control end of accurate a reference source DZ1, added a building-out capacitor C11, the plus earth of accurate a reference source DZ1 between the control end of accurate a reference source DZ1 and the negative electrode.Positive voltage VCC1 receives the anode of the second photoelectrical coupler IC2 internal body diodes simultaneously through a current-limiting resistance R15, the negative terminal of the second photoelectrical coupler IC2 internal body diodes is received the anode of the first photoelectrical coupler IC1 internal body diodes, and the negative terminal of the first photoelectrical coupler IC1 internal body diodes is received the negative electrode of accurate a reference source DZ1; Met the first switching diode D1 between the emitter of the inner triode of the first photoelectrical coupler IC1 and the collector electrode, wherein collector electrode connects the negative terminal of the first switching diode D1, receive the first isolating switch output KVout1 simultaneously, emitter connects the anode of the first switching diode D1, meets the first isolating switch output K Vout1 simultaneously isolator; Met second switch diode D2 between the emitter of the inner triode of the second photoelectrical coupler IC2 and the collector electrode, wherein collector electrode connects the negative terminal of second switch diode D2, receive the second isolating switch output K Vout2 simultaneously, emitter-base bandgap grading connects the anode of second switch diode D2, meets the second isolating switch output K Vout2 simultaneously isolator.The first operational amplifier IC3 links to each other with positive voltage VCC1 with 8 pin of the second operational amplifier IC4 and the 3rd operational amplifier IC5, the first operational amplifier IC3 links to each other with negative supply voltage VSS1 with 4 pin of the second operational amplifier IC4 and the 3rd operational amplifier IC5, and 4 pin of the first operational amplifier IC3 and the second operational amplifier IC4 and the 3rd operational amplifier IC5 are received on the ground by filter capacitor the 6th filter capacitor C7, the 3rd filter capacitor C4, the 4th filter capacitor C5 separately.7 pin of the first operational amplifier IC3 and the second operational amplifier IC4 and the 3rd operational amplifier IC5 are also received on the ground by filter capacitor the 7th filter capacitor C8, the second filter capacitor C3, the 5th filter capacitor C6 separately simultaneously.
The output multiplication factor of first operational amplifier A is 101, this multiplication factor by reverse input resistance R1, with voltage follower input resistance R3 decision, i.e. Au=1+ (R3/R1)=101.The output voltage one side of the first operational amplifier IC3 is as the input of voltage follower B, make accurate aanalogvoltage AG Vout of voltage follower B output, voltage variety when being used to monitor isolating switch and opening and turn-off, judge the sensitivity of switch with this, in the utility model, in the transfer process that isolating switch is opened and turn-offed, the variable quantity of aanalogvoltage AG Vout can not surpass 45mV, therefore switch sensitivity is very high, on the other hand, the output voltage of the first operational amplifier IC3 is the in-phase input end of device C as a comparison also, the inverting input of comparator C connects a 2.5V reference voltage, because the utility model input voltage is ± 12, so the output of comparator C is ± the 12V high-low level.This high-low level is connected to a point of isolating output switch circuit D, the 2.5V benchmark of high-low level that a is ordered and LM431 inside compares, make the output of the built-in operational amplifier of LM431 be ± the 12V high-low level, thereby make inner triode conducting of LM431 and shutoff, when comparator C is output as high level, the 2.5V benchmark of this high level and accurate a reference source LM431 inside compares, output must be high level, this high level makes the triode conducting of LM431 inside, thereby the light-emitting diode of win the photoelectrical coupler IC1 and the second photoelectrical coupler IC2 inside is lighted, the diode of lighting makes the triode conducting of the first photoelectrical coupler IC1 and the second photoelectrical coupler IC2 inside, and then opens the first switching diode D1 and second switch diode D2; In like manner, when being output as low level, the 2.5V benchmark of this low level and LM431 inside compares, output must be low level, this low level can't make the triode conducting of LM431 inside, also just can't light the light-emitting diode of photoelectrical coupler inside, also just can't make the triode conducting of photoelectrical coupler inside, and then also can't open isolating switch.
What operational amplifier IC3, the IC4 in the utility model circuit, IC5 adopted is very low noise high precision operating amplifier of OP27 type, and its input offset voltage temperature is floated I and reached 0.2 μ V/ ℃, and switching rate is the fastest to 2.8V/ μ S.Isolation method adopts photoelectrical coupler, and what select for use here is that miniature sheet photoelectrical coupler (selecting GH4023) is finished isolation output, its current transfer ratio CTR＞100%, isolation resistance 〉=10
10, and suitable surface mounting technology.Accurate a reference source DZ1 is LM431.
In the present embodiment, main thick film film forming and the thick film packaging technology of adopting on the technology, added operating voltage is: ± 12 (± 2) V.
In the present embodiment, main thick film film forming and the thick film packaging technology of adopting on the technology, added operating voltage is: ± 12 (± 2) V, the input offset voltage temperature is floated :≤± 1 μ V/ ℃, two-way is isolated output switching current :≤10mA, switch motion postpones :≤± 45mV (with respect to output voltage), isolation between the input and output: (insulation resistance) 〉=500M Ω.
Among Fig. 2 as can be seen, input is isolated by photoelectrical coupler with output, and two photoelectrical coupler IC1 connect with the IC2 input, and output ground isolates, promptly Shu Chu biswitch is also isolated, and has so just guaranteed synchronous and isolation (the insulation resistance) 〉=500M Ω of biswitch.
During test, to isolate output switch circuit D reverse inter-input-ing ending grounding, in-phase input end connects an adjustable potentiometer, at each external light-emitting diode of two outputs, when regulating adjustable potentiometer, light-emitting diode is lighted simultaneously or is extinguished, and the state on the isolating switch of showing is isolating switch and opens simultaneously or turn-off.
The utility model adopts the production of thick film hybrid integration technology, and substrate adopts 96% AL
2O
3Ceramic substrate, conductive coefficient is good, the intensity height; Conduction band, weld zone, resistance and medium all adopt the multilayer wiring film-forming process of printing and sintering, and adhesive force is good, and resistance is accurately adjustable, and the resistance value temperature is floated little, medium insulativity height; The part components and parts adopt the bare chip assembling, and the gold ball bonding bonding has so just improved the integrated level of circuit greatly; In addition, its packing forms is the full air-tight packaging of metal shell, and cavity contains 99.9% high pure nitrogen, guarantees that in the work or the process of storing inner each components and parts can not be subjected to the corrosion or the oxidation of other atmosphere.Therefore the isolated form biswitch thick-film microcircuit module of coming out with this explained hereafter has integrated level height, volume little (30.5 * 15.24 * 6mm * mm * mm), high temperature resistant (55 ℃～+ 125 ℃, and+150 ℃ of operating times can reach 5 minutes) and the high advantage of reliability.
Claims (3)
1, a kind of isolated form biswitch thick-film microcircuit module, it is characterized in that: it comprises in-phase proportion amplifying circuit (A), voltage follower (B), comparator (C), reference voltage input, isolates output switch circuit (D), in-phase proportion amplifying circuit (A) by first operational amplifier (IC3), in the same way input resistance (R2), oppositely input resistance (R1), Proportional Feedback resistance (R7) and first feedback capacity (C9) are formed in the same way; Voltage follower (B) is made up of voltage follower input resistance (R3) and second operational amplifier (IC4), and voltage follower (B) connects together the inverting input and the output of first operational amplifier (IC3); Comparator (C) is by the 3rd operational amplifier (IC5) and relatively feedback resistance (R11) and electric capacity are formed; Isolating output switch circuit (D) is made up of first photoelectrical coupler (IC1), second photoelectrical coupler (IC2), first switching diode (D1), second switch diode (D2); The output of in-phase proportion amplifying circuit (A) is leaded up to voltage follower input resistance (R3) and is linked to each other with the in-phase input end of voltage follower (B), another road links to each other with the in-phase input end of comparator (C) by comparator input resistance (R8), and the output of comparator (C) links to each other with the input (a) of isolating output switch circuit (D); Isolating first photoelectrical coupler (IC1) of output switch circuit (D) connects with the input of second photoelectrical coupler (IC2), its output links to each other with first switching diode (D1), second switch diode (D2) respectively, first switching diode (D1) links to each other with the first isolating switch output (K Vout1), and second switch diode (D2) links to each other with the second isolating switch output (K Vout2).
2, isolated form biswitch thick-film microcircuit module according to claim 1, it is characterized in that: described reference voltage input is provided by external adjustable precision a reference source, external supply power voltage is received the negative electrode of adjustable precision a reference source, reference voltage (VK) end is received in the plus earth of adjustable precision a reference source, the control utmost point of adjustable precision a reference source.
3, isolated form biswitch thick-film microcircuit module according to claim 1, it is characterized in that: described reference voltage is input as external two divider resistances and obtains, a divider resistance ground connection wherein, another divider resistance connects external supply power voltage, and the mid point of two resistance is received reference voltage (VK) end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078873 CN2794040Y (en) | 2005-06-03 | 2005-06-03 | Isolated microcircuit module with double switches and thick membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078873 CN2794040Y (en) | 2005-06-03 | 2005-06-03 | Isolated microcircuit module with double switches and thick membrane |
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| Publication Number | Publication Date |
|---|---|
| CN2794040Y true CN2794040Y (en) | 2006-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520078873 Expired - Fee Related CN2794040Y (en) | 2005-06-03 | 2005-06-03 | Isolated microcircuit module with double switches and thick membrane |
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| CN (1) | CN2794040Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950342A (en) * | 2015-06-29 | 2015-09-30 | 孙敏 | Mouse and fly bioinstrumentation circuit in health quarantine IoT (Internet of Things) |
| CN109817648A (en) * | 2017-11-21 | 2019-05-28 | 湖北东光电子股份有限公司 | A kind of thick film hybrid integrated circuit and its batch production control method |
-
2005
- 2005-06-03 CN CN 200520078873 patent/CN2794040Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950342A (en) * | 2015-06-29 | 2015-09-30 | 孙敏 | Mouse and fly bioinstrumentation circuit in health quarantine IoT (Internet of Things) |
| CN104950342B (en) * | 2015-06-29 | 2017-06-16 | 马军 | Mouse fly biological detection circuit in a kind of health quarantine Internet of Things |
| CN109817648A (en) * | 2017-11-21 | 2019-05-28 | 湖北东光电子股份有限公司 | A kind of thick film hybrid integrated circuit and its batch production control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060705 Termination date: 20130603 |