CN106372025A - Bus-type communication circuit - Google Patents
Bus-type communication circuit Download PDFInfo
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- CN106372025A CN106372025A CN201610797291.0A CN201610797291A CN106372025A CN 106372025 A CN106372025 A CN 106372025A CN 201610797291 A CN201610797291 A CN 201610797291A CN 106372025 A CN106372025 A CN 106372025A
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- audion
- colelctor electrode
- base stage
- resistance
- optocoupler
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention provides a bus-type communication circuit which comprises a first signal end, a first triode, a second triode, a first optocoupler, a third triode, a second signal end, a fourth triode, a fifth triode, a second optocoupler and a sixth triode which are sequentially connected. A collector electrode of the sixth triode is connected with the first signal end. The bus-type communication circuit further comprises a seventh triode and an eighth triode; a base electrode of the seventh triode is connected with an output end of the first optocoupler; a collector electrode of the seventh triode is connected with a base electrode of the fifth triode; a base electrode of the eighth triode is connected with an output end of the second optocoupler; a collector electrode of the eighth triode is connected with a base electrode of the second triode. The circuit provided by the invention can simultaneously meet bus-type communication and the anti-interference ability.
Description
Technical field
The present invention relates to communicating circuit field, more particularly, to a kind of bus type communicating circuit.
Background technology
Communicating circuit on smart home (as washing machine) has various ways at present.Wherein, a kind of communication for full isolation
Scheme, its communication modes uses the mode of full duplex, matched communications protocol and standard cannot with extensive at present
The agreement of bus type of application and standard match.In addition, when actually used, master control borad and power panel connection mistake occurred
Length causes to communicate situation about being interfered, and isolation effect is undesirable.Another kind of is bus type communicating circuit, can be with the multiple electricity of carry
Brain plate, on mainboard a serial ports can be with multiple computer board communications of carry, but communicating circuit is not isolation, works as carry
Computer board need and mainboard electrically need isolation when, just can not use.
As can be seen here, prior art can not meet simultaneously use under the communications protocol of existing bus type and standard, and
Two technical requirements of strong antijamming capability.
Content of the invention
The present invention is intended to provide a kind of bus type communicating circuit, bus type communication and capacity of resisting disturbance must not be taken into account with solution
Problem, meet bus type communication on the basis of realize entirely isolating to lift capacity of resisting disturbance.
The invention provides a kind of bus type communicating circuit, comprising: the first signal end of being sequentially connected, the first audion,
Second audion, the first optocoupler, the 3rd audion, secondary signal end, the 4th audion, the 5th audion, the second optocoupler and
6th audion；The signal output part of described 6th audion connects described first signal end；Described bus type communicating circuit is also
Including the 7th audion and the 8th triode；The signal input part of described 7th audion connects the signal of described first optocoupler
Outfan, the signal output part of described 7th audion connects the signal input part of described 5th audion；Described eight or three pole
The signal input part of pipe connects the signal output part of described second optocoupler, and the signal output part connection of described 8th audion is described
The signal input part of the second audion.
This circuit also has the following characteristics that
Described first signal end as signal input part and described secondary signal end as signal output part when, described
The current collection of seven audions extremely low level, described second optocoupler is in isolation off-state, described secondary signal end and described the
The signal of one signal end is all high level or low level；
Described secondary signal end as signal input part and described first signal end as signal output part when, described
The current collection of eight audions extremely low level, described first optocoupler is in isolation off-state, described first signal end and described the
The signal at binary signal end is all high level or low level.
This circuit also has the following characteristics that
It is serially connected with first resistor between the colelctor electrode of described 7th audion and the base stage of described 5th audion, described
The resistance of one resistance is less than predetermined threshold value；
The grounded emitter of described 7th audion.
This circuit also has the following characteristics that
The colelctor electrode of described 8th audion connects the base stage of described second audion, described second electricity by second resistance
The resistance of resistance is less than predetermined threshold value；The grounded emitter of described 8th audion.
This circuit also has the following characteristics that
The colelctor electrode of described 5th audion connects the input of power supply and described second optocoupler, described 5th audion
Grounded emitter；And/or,
The colelctor electrode of described second audion connects the input of power supply and described first optocoupler, described second audion
Grounded emitter.
This circuit also has the following characteristics that
The base stage of described first audion connects described first signal end, and the emitter stage of described first audion connects electricity
Source, the colelctor electrode of described first audion connects the base stage of described second audion；And/or,
The base stage of described 3rd audion connects the outfan of described first optocoupler, and the emitter stage of described 3rd audion connects
Ground, the colelctor electrode of described 3rd audion connects the base stage of described secondary signal end and described 4th audion.
This circuit also has the following characteristics that
The emitter stage of described 4th audion connects power supply, and the colelctor electrode of described 4th audion connects described five or three pole
The base stage of pipe；And/or,
The base stage of described 6th audion connects the outfan of described second optocoupler, and the emitter stage of described 6th audion connects
Ground, the colelctor electrode of described 6th audion connects power supply and described first signal end.
This circuit also has the following characteristics that
Described first audion, the second audion, the 3rd audion, secondary signal end, the 4th audion, the five or three pole
At least one of pipe, base stage branch road of the 6th audion, the 7th audion and the 8th triode are provided with input resistance；
And/or,
The emitter stage of described first audion, the colelctor electrode of the second triode, the colelctor electrode of the 4th triode and described
At least one of colelctor electrode of 5th audion is provided with output resistance.
This circuit also has the following characteristics that
In the colelctor electrode of described second audion, the colelctor electrode of the 5th audion, the colelctor electrode of the 6th audion at least
One is provided with pull-up resistor and power supply between；And/or,
Described first audion, the 4th audion, the 5th audion, the 6th audion, the 7th audion and the eight or three
It is provided with resistance between the base stage of level pipe and emitter stage.
This circuit also has the following characteristics that
Also include resistance and the resistance-capacitance circuit of electric capacity parallel connection；The base stage of described second audion and described second audion
It is provided with described resistance-capacitance circuit between emitter stage, and/or, the base stage of described 3rd audion and the transmitting of described 3rd audion
It is provided with described resistance-capacitance circuit between pole.
Bus type communicating circuit proposed by the present invention, sends low electricity by using the 8th audion in bus type communicating circuit
At ordinary times, correspond to and move the current potential of the signal input part of described second audion to low level, correspondence makes described first optocoupler be in
Off-state；And using the 7th audion when bus type communicating circuit receives low level, by the letter of described 5th audion
The current potential of number input moves low level to, and correspondence makes described second optocoupler be off, thus realizing bus communication
On the basis of, also achieve anti-interference purpose.
Following description for exemplary embodiment is read with reference to the drawings, other property features of the present invention and advantage will
It is apparent from.
Brief description
It is incorporated in description and constitutes the accompanying drawing of a part for description and show embodiments of the invention, and with
Description is used for explaining the principle of the present invention together.In the drawings, similar reference is used for representing similar key element.Under
Accompanying drawing in the description of face is some embodiments of the present invention, rather than whole embodiments.Those of ordinary skill in the art are come
Say, on the premise of not paying creative work, other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 schematically illustrates a kind of circuit structure diagram of bus type communicating circuit.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.Need
Illustrate, in the case of not conflicting, the embodiment in the application and the feature in embodiment can mutual combination in any.
As shown in figure 1, a kind of the present embodiment bus type communicating circuit includes: the first signal end a of being sequentially connected, the one or three
Pole pipe p1, the second audion n2, the first optocoupler pc1, the 3rd audion n1, secondary signal end e, the 4th audion p2, the five or three
Pole pipe n6, the second optocoupler pc2 and the 6th audion n5；The colelctor electrode of the 6th audion n5 connects the first signal end a；Bus type
Communicating circuit also includes the 7th audion n3 and the 8th triode n4；The base stage of the 7th audion n3 connects the first optocoupler pc1
Outfan, the colelctor electrode of the 7th audion n3 connects the base stage of the 5th audion n6；The base stage of the 8th audion n4 connects the
The outfan of two optocoupler pc2, the base stage of the 8th audion n4 connects the base stage of the second audion n2.First signal end a is as letter
Number input and when secondary signal end e is as signal output part, the current collection extremely low level of the 7th audion n3, and the second light
Coupling pc2 is in isolation off-state；The signal of the first signal end a and secondary signal end e is all high level or low level；Second letter
Number end e as signal input part and the first signal end as signal output part when, the extremely low electricity of current collection of the 8th audion n4
Flat, and the first optocoupler pc1 is in isolation off-state；The signal at the first signal end and secondary signal end is all high level or low electricity
Flat.
It is to be understood that being divided into npn and pnp because triode has, therefore the concrete setting form of each audion
Can there is different choice.With the first audion p1 and the 4th audion p2 for npn audion in the present embodiment, the second audion
N2, the 3rd audion n1, the 5th audion n6, the 6th audion n5, the 7th audion n3 and the 8th triode n4 are pnp
Explain as a example audion.Realize the isolation bus communication purpose of the present invention, the particular type of each audion, each three poles
The resistance of each terminal connecting object (resistance and electric capacity) of pipe and connecting object can change, and should not do limited understanding.Additionally,
In Fig. 1, the voltage of power supply explains taking 12v as a example, also should not do limited understanding.
Specifically, the signal input part of the first audion p1 is base stage and connects the first signal end a, emitter stage connects electricity
Source, colelctor electrode connects the signal input part of the second audion n2 as signal output part.Further, the base of the first audion p1
Pole is provided with input resistance r5, is provided with resistance r1 between the base stage of the first audion p1 and emitter stage, the first audion p1's
Emitter stage is provided with output resistance r6.
The signal input part of the second audion n2 is base stage, and colelctor electrode connects the signal input of power supply and the first optocoupler pc1
End, grounded emitter.Further, the base stage of the second audion n2 is provided with input resistance r7.The base stage of the second audion n2
It is provided with resistance-capacitance circuit and the emitter stage of the second audion n2 between, this resistance-capacitance circuit includes the electric capacity c1 and resistance r9 of parallel connection.
It is provided with pull-up resistor r2 between the colelctor electrode of the second audion n2 and power supply.The colelctor electrode of the second triode n2 is provided with output
Resistance r4.
The signal input part of the 3rd audion n1 is base stage and the signal output part connecting the first optocoupler pc1, and emitter stage connects
Ground, colelctor electrode connects the signal input part of the 4th audion p2 as signal output part.Further, the base of the 3rd audion n1
Pole is provided with input resistance r3.It is provided with capacitance-resistance electricity between the base stage of the 3rd audion n1 and the emitter stage of the 3rd audion n1
Road, this resistance-capacitance circuit includes the electric capacity c2 and resistance r8 of parallel connection.
The signal input part of the 4th audion p2 is base stage, and emitter stage connects power supply, and colelctor electrode is as signal output part even
Connect the signal input part of the 5th audion n6.Further, the base stage of the 4th audion p2 is provided with input resistance r23.4th
It is provided with resistance r16 between the base stage of audion p2 and emitter stage.The colelctor electrode of the 4th audion p2 is provided with output resistance
r22.
The signal input part of the 5th audion n6 is base stage, and colelctor electrode connects the signal input of power supply and the second optocoupler pc2
End, grounded emitter.Further, the base stage of the 5th audion n6 is provided with input resistance r21.The base stage of the 5th audion n6
It is provided with resistance r25 and emitter stage between.It is provided with pull-up resistor r18 between the colelctor electrode of the 5th audion n6 and power supply.The
The colelctor electrode of five audion n6 is provided with output resistance r20.
The signal input part of the 6th audion n5 is base stage and the signal output part connecting the second optocoupler pc2, and emitter stage connects
Ground, colelctor electrode connects power supply and the first signal end a.Further, additionally, the base stage of the 6th audion n5 is provided with input resistance
r19.It is provided with resistance r24 between the base stage of the 6th audion n5 and emitter stage.The colelctor electrode of the 6th audion n5 and power supply it
Between be provided with pull-up resistor r17.
The signal input part of the 7th audion n3 is base stage；The signal output part of the 7th audion is colelctor electrode, and passes through
First resistor r15 connects the signal input part of the 5th audion n6, and resistance r15 of first resistor is less than predetermined threshold value, and this presets
Threshold value is the resistance value of default first resistor r15, the value of this predetermined threshold value can arrange smaller to guarantee f point
With moving to, on the premise of meeting this condition, specific size can freely set current potential as needed；7th audion
Grounded emitter.Additionally, the base stage of the 7th audion n3 is provided with input resistance r11.The base stage of the 7th audion n3 and transmitting
It is provided with resistance r13 between pole.
The signal input part of the 8th audion n4 is base stage；The signal output part of the 8th audion n4 is colelctor electrode, and leads to
Cross the signal input part that second resistance r10 connects the second audion n2, (this is pre- less than predetermined threshold value for the resistance of second resistance r10
If threshold value is the resistance value of default second resistance r10, can freely set as needed) sufficiently small to ensure, so as to by b
The current potential of point moves ground to；The grounded emitter of the 8th audion.Additionally, the base stage of the 8th triode n4 is provided with input resistance
r12.It is provided with resistance r14 between the base stage of the 8th audion n4 and emitter stage.
The work process of above-mentioned bus type communicating circuit is summarized as follows: in the present embodiment, working method is semiduplex, that is,
First signal end and secondary signal end can not receive when sending, and can not send during reception.
The first situation, bus type communicating circuit receipt signal, that is, the first signal end is receiving terminal rx:
If a point is high level, the first audion p1 cut-off, now b point is low level, then the second audion n2 cut-off, c
Point is high level, and the first optocoupler pc1 is not turned on, and d point is low level, and the 3rd audion n1 and the 7th audion n3 is turned off, then e
Point is high level, the 4th audion p2 cut-off, and f point is low level, the 5th audion n6 cut-off, and g point is high level, the second optocoupler
Pc2 ends, and h point is low level, the 8th audion n4 and the 6th audion n5 cut-off, therefore a level point is not affected.Due to a
Point is high level, leads to e point to be high level, therefore communicates successfully.Meanwhile, the second optocoupler pc2 cut-off, realizes anti-interference purpose.
If a point is low level, the first audion p1 saturation conduction, b point is high level, then the second audion n2 saturation is led
Logical, then c point is low level, the first optocoupler pc1 conducting, then d point is high level, the 3rd audion n1 and the 7th audion n3 saturation
Conducting, then e point is low level, and f point is low level, because e point is low level, so the 4th audion p2 conducting, because f point is
Low level, so the 5th audion n6 cut-off, the second optocoupler pc2 cut-off, h point is low level, the 8th audion n4 and the six or three
Pole pipe n5 is ended, therefore b point and a level point is not affected, and when being low due to a level point, e level point is also low, therefore communicates into
Work(.Meanwhile, the second optocoupler pc2 cut-off, realizes anti-interference purpose.
Second situation, bus type communicating circuit sending signal, that is, secondary signal end is receiving terminal, and the first signal end is to send out
Sending end tx:
If e point is high level, the 4th audion p2 cut-off, f point is low level, the 5th audion n6 cut-off, and g point is height
Level, the second optocoupler pc2 cut-off, h point is low level, the 8th audion n4 and the 6th audion n5 cut-off, then a point is high electricity
Flat, during because of e point for high level, a point is also high level, therefore communicates successfully；Simultaneously as a point is high level, c point is also high electricity
Flat, the first optocoupler pc1 cut-off, realize anti-interference purpose.
If e point is low level, the 4th audion p2 saturation conduction, f point is high level, and the 5th audion n6 saturation is led
Logical, then g point is low level, the second optocoupler pc2 conducting, and h point is high level, then the 8th audion n4 and the 6th audion n5 saturation
Conducting, then a point and b point are low level, because a point is low level, then the first audion p1 saturation conduction, but due to b point current potential
Ground is moved to by the 8th audion n4, c point is also high level, the first optocoupler pc1 cut-off, so do not have shadow to audion below
Ring, during because of e point for low level, a point is also low level, therefore communicates successfully.Meanwhile, even if a point is low level, c point is also high electricity
Flat, the first optocoupler pc1 cut-off, realize anti-interference purpose.
The present embodiment utilizes the 8th audion n4 and the 7th audion n3, corresponds to and sends in bus type communicating circuit or connect
When receiving low level, correspond to and move b point or f point current potential to ground, although now corresponding first audion p1 or the four or three pole
Pipe p2 saturation conduction, but the low level of front end communication signal input will not be impacted.Simultaneously in order to realize this work
With, second resistance r10 and first resistor r15 to try one's best when from resistance little so that b point current potential and f point electricity during pipe conducting
Position closely, makes audion below be in cut-off state, realizes, on the basis of bus communication, realizing anti-interference purpose.
Descriptions above can combine individually or in every way enforcement, and these variant all exist
Within protection scope of the present invention.
Finally it is noted that above example, only in order to technical scheme to be described, is not intended to limit.Although
With reference to the foregoing embodiments the present invention is described in detail, it will be understood by those within the art that: it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. bus type communicating circuit is it is characterised in that include: the first signal end of being sequentially connected, the first audion, the two or three pole
Pipe, the first optocoupler, the 3rd audion, secondary signal end, the 4th audion, the 5th audion, the second optocoupler and the six or three pole
Pipe；The colelctor electrode of described 6th audion connects described first signal end；Described bus type communicating circuit also includes the seven or three pole
Pipe and the 8th triode；The base stage of described 7th audion connects the outfan of described first optocoupler, described 7th audion
Colelctor electrode connect described 5th audion base stage；The base stage of described 8th audion connects the output of described second optocoupler
End, the colelctor electrode of described 8th audion connects the base stage of described second audion.
2. bus type communicating circuit according to claim 1 it is characterised in that
Described first signal end as signal input part and described secondary signal end as signal output part when, the described 7th 3
The current collection of pole pipe extremely low level, described second optocoupler is in isolation off-state, described secondary signal end and described first letter
Number end signal be all high level or low level；
Described secondary signal end as signal input part and described first signal end as signal output part when, the described 8th 3
The current collection of pole pipe extremely low level, described first optocoupler is in isolation off-state, described first signal end is believed with described second
Number end signal be all high level or low level.
3. bus type communicating circuit according to claim 1 it is characterised in that
It is serially connected with first resistor, described first electricity between the colelctor electrode of described 7th audion and the base stage of described 5th audion
The resistance of resistance is less than predetermined threshold value；
The grounded emitter of described 7th audion.
4. bus type communicating circuit according to claim 1 is it is characterised in that the colelctor electrode of described 8th audion passes through
Second resistance connects the base stage of described second audion, and the resistance of described second resistance is less than predetermined threshold value；Described eight or three pole
The grounded emitter of pipe.
5. bus type communicating circuit according to claim 1 is it is characterised in that the colelctor electrode of described 5th audion connects
Power supply and the input of described second optocoupler, the grounded emitter of described 5th audion；And/or,
The colelctor electrode of described second audion connects the input of power supply and described first optocoupler, the transmitting of described second audion
Pole is grounded.
6. bus type communicating circuit according to claim 1 is it is characterised in that the base stage of described first audion connects institute
State the first signal end, the emitter stage of described first audion connects power supply, the colelctor electrode of described first audion connects described the
The base stage of two audions；And/or,
The outfan of base stage described first optocoupler of connection of described 3rd audion, the grounded emitter of described 3rd audion,
The colelctor electrode of described 3rd audion connects the base stage of described secondary signal end and described 4th audion.
7. bus type communicating circuit according to claim 1 is it is characterised in that the emitter stage of described 4th audion connects
Power supply, the colelctor electrode of described 4th audion connects the base stage of described 5th audion；And/or,
The outfan of base stage described second optocoupler of connection of described 6th audion, the grounded emitter of described 6th audion,
The colelctor electrode of described 6th audion connects power supply and described first signal end.
8. bus type communicating circuit according to claim 1 it is characterised in that described first audion, the second audion,
3rd audion, secondary signal end, the 4th audion, the 5th audion, the 6th audion, the 7th audion and the 8th three-level
At least one of base stage branch road of pipe is provided with input resistance；And/or,
The emitter stage of described first audion, the colelctor electrode of the second triode, the colelctor electrode of the 4th triode and the described 5th
At least one of colelctor electrode of audion is provided with output resistance.
9. bus type communicating circuit according to claim 1 it is characterised in that the colelctor electrode of described second audion,
At least one of the colelctor electrode of five audions, colelctor electrode of the 6th audion are provided with pull-up resistor and power supply between；With/
Or,
Described first audion, the 4th audion, the 5th audion, the 6th audion, the 7th audion and the 8th triode
Base stage and emitter stage between be provided with resistance.
10. bus type communicating circuit according to claim 1 is it is characterised in that also include resistance and the resistance of electric capacity parallel connection
Capacitive circuit；It is provided with described resistance-capacitance circuit between the emitter stage of the base stage of described second audion and described second audion, and/
Or, being provided with described resistance-capacitance circuit between the base stage of described 3rd audion and the emitter stage of described 3rd audion.
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| CN201610797291.0A CN106372025B (en) | 2016-08-31 | 2016-08-31 | Bus type communicating circuit |
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| CN201610797291.0A CN106372025B (en) | 2016-08-31 | 2016-08-31 | Bus type communicating circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167594A (en) * | 2017-10-30 | 2019-01-08 | 武汉奇致激光技术股份有限公司 | A kind of photoelectric coupling structures and methods of micro controller and one-wire bus device |
| CN111060767A (en) * | 2019-12-28 | 2020-04-24 | 广东盈科电子有限公司 | ATE tester |
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| CN201039214Y (en) * | 2007-05-23 | 2008-03-19 | 沈之柱 | RS232 remote driver |
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| CN102353845A (en) * | 2011-06-24 | 2012-02-15 | 华南理工大学 | Self-compensated dual-circuit conductivity detection monitor with symmetrical leads |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167594A (en) * | 2017-10-30 | 2019-01-08 | 武汉奇致激光技术股份有限公司 | A kind of photoelectric coupling structures and methods of micro controller and one-wire bus device |
| CN111060767A (en) * | 2019-12-28 | 2020-04-24 | 广东盈科电子有限公司 | ATE tester |
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