CN110212919A - Esd protection device and multiplex machine for 16 channel analog multiplexers - Google Patents
Esd protection device and multiplex machine for 16 channel analog multiplexers Download PDFInfo
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- CN110212919A CN110212919A CN201910445081.9A CN201910445081A CN110212919A CN 110212919 A CN110212919 A CN 110212919A CN 201910445081 A CN201910445081 A CN 201910445081A CN 110212919 A CN110212919 A CN 110212919A
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- channel analog
- analog multiplexer
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- 230000007257 malfunction Effects 0.000 claims abstract description 12
- 230000005669 field effect Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
- H03M1/0827—Continuously compensating for, or preventing, undesired influence of physical parameters of noise of electromagnetic or electrostatic field noise, e.g. preventing crosstalk by shielding or optical isolation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/1205—Multiplexed conversion systems
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
The present invention provides a kind of esd protection circuit and multiplex machine for 16 channel analog multiplexers, belongs to field of communication technology.The esd protection circuit includes: emergency circuit, is connect with the input terminal of 16 channel analog multiplexers, in the case where receiving indication signal, by the input end grounding of 16 channel analog multiplexers；It warns circuit, connect, be used for the input terminal of 16 channel analog multiplexers and output end: receiving the input signal of 16 channel analog multiplexers of input and the output signal of 16 channel analog multiplexers by input terminal；The expected output signal that 16 channel analog multiplexers export in normal operation is determined according to input signal；Expected output signal and output signal are compared, determine whether 16 channel analog multiplexers are in malfunction；In the case where judging that 16 channel analog multiplexers are in malfunction, emergency circuit is controlled by the input end grounding of 16 channel analog multiplexers.
Description
Technical field
The present invention relates to fields of communication technology, protect more particularly to a kind of ESD for 16 channel analog multiplexers
Protection circuit and multiplex machine.
Background technique
16 channel analog multiplexers are the common devices of circuit, are mainly used for translating 16 binary electrical signals
For the digital signal of 10 systems.It include multiple metal-oxide-semiconductors and other microelectronic devices since it is internal, in the process of work
In, once it breaks down, if input signal continues input and will lead to 16 channel analog multiplexers and burn, or even damage
Other component in machine.
Summary of the invention
The purpose of embodiment of the present invention be to provide a kind of esd protection circuit for 16 channel analog multiplexers and
Multiplex machine, this is used for the esd protection circuit of 16 channel analog multiplexers and multiplex machine can be logical 16
By input end grounding when road analog multiplexer breaks down, to avoid that further accident occurs.
To achieve the goals above, embodiment of the present invention provides a kind of ESD for 16 channel analog multiplexers
Circuit is protected, the esd protection circuit may include:
Emergency circuit is connect, in the feelings for receiving indication signal with the input terminal of 16 channel analog multiplexer
Under condition, by the input end grounding of 16 channel analog multiplexer；
It warns circuit, connect, be used for the input terminal of 16 channel analog multiplexer and output end:
The input signal and 16 channel mould for inputting 16 channel analog multiplexer are received by the input terminal
The output signal of quasi- multiplexer；
The expection for determining that 16 channel analog multiplexer exports in normal operation according to the input signal is defeated
Signal out；
The expected output signal is compared with the output signal, whether determines 16 channel analog multiplexer
In malfunction；
In the case where judging that 16 channel analog multiplexer is in malfunction, it is described to control to send indication signal
Emergency circuit is by the input end grounding of 16 channel analog multiplexer.
Optionally, the circuit of warning includes the one 16 channel analog multiplexer and processor, and the described 1st is logical
The input terminal of road analog multiplexer is connect with the input terminal of 16 channel analog multiplexer, the one 16 channel
The output end of analog multiplexer is connect with the first end of the processor, the second end of the processor and 16 channel
The output end of analog multiplexer connects, and the processor is used for the output of the one 16 channel analog multiplexer
Signal is compared with the output signal of 16 channel analog multiplexer, determines 16 channel analog multiplexer
Whether break down.
Optionally, the emergency circuit includes multiple controllable switches, the first end of each controllable switch and described 16
One input terminal of channel analog multiplexer connects, the second end ground connection of each controllable switch, each described controllable
The third end of switch is connect with the third end of the processor.
Optionally, the controllable switch is at least one of trigger, triode or field-effect tube.
On the other hand, the present invention also provides a kind of 16 channel analogy multiplex machines, the 16 channel analogy multichannel is multiple
Include: with device
16 channel analog multiplexers, the input terminal of 16 channel analog multiplexer are used to receive external input letter
Number, 16 channel analog multiplexer is used to generate output signal according to the input signal of 16 bits；
Emergency circuit is connect, in the feelings for receiving indication signal with the input terminal of 16 channel analog multiplexer
Under condition, by the input end grounding of 16 channel analog multiplexer；
It warns circuit, connect, be used for the input terminal of 16 channel analog multiplexer and output end:
The input signal and 16 channel mould for inputting 16 channel analog multiplexer are received by the input terminal
The output signal of quasi- multiplexer；
The expection for determining that 16 channel analog multiplexer exports in normal operation according to the input signal is defeated
Signal out；
The expected output signal is compared with the output signal, whether determines 16 channel analog multiplexer
In malfunction；
In the case where judging that 16 channel analog multiplexer is in malfunction, it is described to control to send indication signal
Emergency circuit is by the input end grounding of 16 channel analog multiplexer.
Optionally, the circuit of warning includes the one 16 channel analog multiplexer and processor, and the described 1st is logical
The input terminal of road analog multiplexer is connect with the input terminal of 16 channel analog multiplexer, the one 16 channel
The output end of analog multiplexer is connect with the first end of the processor, the second end of the processor and 16 channel
The output end of analog multiplexer connects, and the processor is used for the output of the one 16 channel analog multiplexer
Signal is compared with the output signal of 16 channel analog multiplexer, determines 16 channel analog multiplexer
Whether break down.
Optionally, the emergency circuit includes multiple controllable switches, the first end of each controllable switch and described 16
One input terminal of channel analog multiplexer connects, the second end ground connection of each controllable switch, each described controllable
The third end of switch is connect with the third end of the processor.
Optionally, the controllable switch is at least one of trigger, triode or field-effect tube.
Through the above technical solutions, can provided by the present invention for the esd protection circuit of 16 channel analog multiplexers
In the case where 16 channel analog multiplexers break down, the input of 16 channel analog multiplexer to be terminated
Ground, to avoid the occurrence of further accident.On the other hand, 16 channel analogy multiplex machine provided by the invention relative to
For 16 traditional channel analog multiplexers, in case of a failure, input signal can be grounded in time, from
And avoid further accident.
The other feature and advantage of embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to embodiment of the present invention, and constitute part of specification, with
Following specific embodiment is used to explain the present invention embodiment together, but does not constitute the limit to embodiment of the present invention
System.In the accompanying drawings:
Fig. 1 is the circuit diagram for 16 channel analog multiplexers according to embodiment of the present invention；
Fig. 2 is the circuit diagram of circuit of warning according to embodiment of the present invention；And
Fig. 3 is the interface diagram of controllable switch according to embodiment of the present invention.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to embodiment of the present invention.It should be understood that
Embodiment that the specific embodiments described herein are merely illustrative of the invention is not intended to restrict the invention implementation
Mode.
In the application embodiment, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom "
Usually for direction shown in the drawings either for it is vertical, vertically or on gravity direction for each component it is mutual
Positional relationship describes word.
In addition, if relating to the description of " first ", " second " etc. in the application embodiment, it should " first ", " second "
Deng description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated
The quantity of technical characteristic." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one and be somebody's turn to do
Feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill people
Based on member can be realized, this technical solution will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
Combination be not present, also not this application claims protection scope within.
It is the ESD guarantor for 16 channel analog multiplexers according to embodiment of the present invention as shown in Figure 1
The circuit diagram of protection circuit.In Fig. 1, which may include: warn circuit 10 and emergency circuit 20.
Emergency circuit 20 can be connect with the input terminal (port 1 to 16) of 16 channel analog multiplexers 30, be used for
In the case where receiving indication signal, by the input end grounding of 16 channel analog multiplexers 30.
Circuit 10 of warning can be connect with the input terminal of 16 channel analog multiplexers 30 and output end, for by defeated
Enter end and receives the input signal of 16 channel analog multiplexers 30 of input and the output of 16 channel analog multiplexers 30
Signal；The anticipated output letter that 16 channel analog multiplexers 30 export in normal operation is determined according to the input signal
Number；Expected output signal is compared with output signal, determines 16 channel analog multiplexers 30 whether in failure shape
State；In the case where judging that 16 channel analog multiplexers 30 are in malfunction, indication signal is sent to control and answers urgent telegram
Road 10 is by the input end grounding of 16 channel analog multiplexers 30.
In an embodiment of the invention, as shown in Fig. 2, circuit 10 of warning may include that the one 16 channel analogy is more
Path multiplexer 11 and processor 12.The input terminal (port 1 to 16) of one 16 channel analog multiplexer 11 can lead to 16
The input terminal of road analog multiplexer 12 connects, and the output end of the one 16 channel analog multiplexer 11 can be with processor
12 first end connection, the second end of processor 12 can connect with the output end of 16 channel analog multiplexers 30, handle
Device 12 is used for the output signal (expected output signal) of the one 16 channel analog multiplexer 11 and 16 channel analogy multichannels
The output signal of multiplexer 30 is compared, and determines whether 16 channel analog multiplexer 30 breaks down.
In an embodiment of the invention, emergency circuit 20 may include multiple controllable switches.Each controllable switch
Can be for example shown in Fig. 2, an input terminal of the first end A of each controllable switch and 16 channel analog multiplexers 30 connects
It connects, the second end B ground connection of each controllable switch, the third end C of each controllable switch and the third end of processor connect.For this
The concrete form of controllable switch can be trigger known to including but not limited to those skilled in the art, triode or field-effect tube
Deng.
On the other hand, the present invention also provides a kind of 16 channel analogy multiplex machines, 16 channel analogy multiplexings
Device may include: warn circuit 10, the channel analog multiplexer of emergency circuit 20 and 16 30.
The input terminal of 16 channel analog multiplexers 30 can be used for receiving external input signal, 16 channel analogy
Multiplexer 30 can be used for generating output signal according to the input signal of 16 bits.
Emergency circuit 20 can be connect with the input terminal of 16 channel analog multiplexers 30, for receiving instruction letter
In the case where number, by the input end grounding of 16 channel analog multiplexers.
Circuit 10 of warning can be connect with the input terminal of 16 channel analog multiplexers 30 and output end, for by defeated
Enter end and receives the input signal of 16 channel analog multiplexers 30 of input and the output of 16 channel analog multiplexers 30
Signal；The anticipated output letter that 16 channel analog multiplexers 30 export in normal operation is determined according to input signal
Number；Expected output signal is compared with output signal, determines 16 channel analog multiplexers 30 whether in failure shape
State；In the case where judging that 16 channel analog multiplexers 30 are in malfunction, indication signal is sent to control and answers urgent telegram
Road 20 is by the input end grounding of 16 channel analog multiplexers 30.
In an embodiment of the invention, which may include the one 16 channel analog multiplexer 11
With processor 12.The input of the input terminal of one 16 channel analog multiplexer 11 and 16 channel analog multiplexers 30
End connection, the output end of the one 16 channel analog multiplexer 11 connect with the first end of processor 12, and the of processor 12
Two ends are connect with the output end of 16 channel analog multiplexers 30, and processor 12 can be used for the one 16 channel analogy multichannel
The output signal of multiplexer 11 is compared with the output signal of 16 channel analog multiplexers 30, determines that 16 channel analogies are more
Whether path multiplexer breaks down.
In an embodiment of the invention, which may include multiple controllable switches.Each controllably open
The first end A of pass is connect with an input terminal of 16 channel analog multiplexers, the 2nd B ground connection of each controllable switch, often
The third end C of a controllable switch and the third end of processor connect.For the concrete form of the controllable switch, can be including but
It is not limited to trigger known to those skilled in the art, triode or field-effect tube etc..
Through the above technical solutions, can provided by the present invention for the esd protection circuit of 16 channel analog multiplexers
In the case where 16 channel analog multiplexers break down, the input of 16 channel analog multiplexer to be terminated
Ground, to avoid the occurrence of further accident.On the other hand, 16 channel analogy multiplex machine provided by the invention relative to
For 16 traditional channel analog multiplexers, in case of a failure, input signal can be grounded in time, from
And avoid further accident.
The optional embodiment of example of the present invention is described in detail in conjunction with attached drawing above, still, embodiment of the present invention is not
The detail being limited in above embodiment can be to of the invention real in the range of the technology design of embodiment of the present invention
The technical solution for applying mode carries out a variety of simple variants, these simple variants belong to the protection scope of embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, embodiment of the present invention
To various combinations of possible ways, no further explanation will be given.
It will be appreciated by those skilled in the art that realizing that all or part of the steps in above embodiment method is can to lead to
Program is crossed to instruct relevant hardware and complete, which is stored in a storage medium, including some instructions use so that
One (can be single-chip microcontroller, chip etc.) or processor (processor) execute each embodiment the method for the application
All or part of the steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
In addition, any combination can also be carried out between a variety of different embodiments of embodiment of the present invention, as long as its
Without prejudice to the thought of embodiment of the present invention, embodiment of the present invention disclosure of that equally should be considered as.
Claims (8)
1. a kind of esd protection circuit for 16 channel analog multiplexers, which is characterized in that the protection circuit includes:
Emergency circuit is connect, in the feelings for receiving indication signal with the input terminal of 16 channel analog multiplexer
Under condition, by the input end grounding of 16 channel analog multiplexer；
It warns circuit, connect, be used for the input terminal of 16 channel analog multiplexer and output end:
The input signal and 16 channel mould for inputting 16 channel analog multiplexer are received by the input terminal
The output signal of quasi- multiplexer；
The expection for determining that 16 channel analog multiplexer exports in normal operation according to the input signal is defeated
Signal out；
The expected output signal is compared with the output signal, whether determines 16 channel analog multiplexer
In malfunction；
In the case where judging that 16 channel analog multiplexer is in malfunction, it is described to control to send indication signal
Emergency circuit is by the input end grounding of 16 channel analog multiplexer.
2. esd protection circuit according to claim 1, which is characterized in that the circuit of warning includes the one 16 channel mould
Quasi- multiplexer and processor, the input terminal of the one 16 channel analog multiplexer and the 16 channel analogy multichannel
The input terminal of multiplexer connects, and the output end of the one 16 channel analog multiplexer and the first end of the processor connect
It connects, the second end of the processor is connect with the output end of 16 channel analog multiplexer, and the processor is used for will
The output signal of one 16 channel analog multiplexer and the output signal of 16 channel analog multiplexer into
Row compares, and determines whether 16 channel analog multiplexer breaks down.
3. esd protection circuit according to claim 1, which is characterized in that the emergency circuit includes multiple controllable switches,
The first end of each controllable switch is connect with an input terminal of 16 channel analog multiplexer, it is each described can
The second end ground connection of control switch, the third end of each controllable switch is connect with the third end of the processor.
4. esd protection circuit according to claim 3, which is characterized in that the controllable switch be trigger, triode or
At least one of field-effect tube.
5. a kind of 16 channel analogy multiplex machines, which is characterized in that the 16 channel analogy multiplex machine includes:
16 channel analog multiplexers, the input terminal of 16 channel analog multiplexer are used to receive external input letter
Number, 16 channel analog multiplexer is used to generate output signal according to the input signal of 16 bits；
Emergency circuit is connect, in the feelings for receiving indication signal with the input terminal of 16 channel analog multiplexer
Under condition, by the input end grounding of 16 channel analog multiplexer；
It warns circuit, connect, be used for the input terminal of 16 channel analog multiplexer and output end:
The input signal and 16 channel mould for inputting 16 channel analog multiplexer are received by the input terminal
The output signal of quasi- multiplexer；
The expection for determining that 16 channel analog multiplexer exports in normal operation according to the input signal is defeated
Signal out；
The expected output signal is compared with the output signal, whether determines 16 channel analog multiplexer
In malfunction；
In the case where judging that 16 channel analog multiplexer is in malfunction, it is described to control to send indication signal
Emergency circuit is by the input end grounding of 16 channel analog multiplexer.
6. 16 channel analogy multiplex machine according to claim 5, which is characterized in that the circuit of warning includes the
One 16 channel analog multiplexers and processor, the input terminal of the one 16 channel analog multiplexer are logical with described 16
The input terminal of road analog multiplexer connects, the output end and the processor of the one 16 channel analog multiplexer
First end connection, the second end of the processor connect with the output end of 16 channel analog multiplexer, the place
Device is managed to be used for the output signal of the one 16 channel analog multiplexer and 16 channel analog multiplexer
Output signal is compared, and determines whether 16 channel analog multiplexer breaks down.
7. esd protection circuit according to claim 5, which is characterized in that the emergency circuit includes multiple controllable switches,
The first end of each controllable switch is connect with an input terminal of 16 channel analog multiplexer, it is each described can
The second end ground connection of control switch, the third end of each controllable switch is connect with the third end of the processor.
8. esd protection circuit according to claim 7, which is characterized in that the controllable switch be trigger, triode or
At least one of field-effect tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910445081.9A CN110212919A (en) | 2019-05-27 | 2019-05-27 | Esd protection device and multiplex machine for 16 channel analog multiplexers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910445081.9A CN110212919A (en) | 2019-05-27 | 2019-05-27 | Esd protection device and multiplex machine for 16 channel analog multiplexers |
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|---|---|
| CN110212919A true CN110212919A (en) | 2019-09-06 |
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|---|---|---|---|
| CN201910445081.9A Pending CN110212919A (en) | 2019-05-27 | 2019-05-27 | Esd protection device and multiplex machine for 16 channel analog multiplexers |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63246015A (en) * | 1987-04-01 | 1988-10-13 | Oki Electric Ind Co Ltd | Preventing circuit for over input of automatic output control circuit |
| JPH05101228A (en) * | 1991-10-03 | 1993-04-23 | Toshiba Corp | Analog switch input card system |
| JPH08330959A (en) * | 1995-05-31 | 1996-12-13 | Sumitomo Electric Ind Ltd | Failure detection method for AD input circuit |
| JPH11154864A (en) * | 1997-11-21 | 1999-06-08 | Nec Corp | Analog/digital converting device |
| US6704829B1 (en) * | 1999-11-24 | 2004-03-09 | Alps Electric Co., Ltd. | Switch input processing module for switching signal transmission lines to transmit different types of signals |
| US20100235699A1 (en) * | 2009-03-06 | 2010-09-16 | Hitachi, Ltd. | Fault diagnosis apparatus and fault diagnosis method of multi-channel analog input/output circuit |
| JP2016001988A (en) * | 2014-06-11 | 2016-01-07 | ジョン、ヨンーギ | Surge protection device for communication in multiplex protection mode |
-
2019
- 2019-05-27 CN CN201910445081.9A patent/CN110212919A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63246015A (en) * | 1987-04-01 | 1988-10-13 | Oki Electric Ind Co Ltd | Preventing circuit for over input of automatic output control circuit |
| JPH05101228A (en) * | 1991-10-03 | 1993-04-23 | Toshiba Corp | Analog switch input card system |
| JPH08330959A (en) * | 1995-05-31 | 1996-12-13 | Sumitomo Electric Ind Ltd | Failure detection method for AD input circuit |
| JPH11154864A (en) * | 1997-11-21 | 1999-06-08 | Nec Corp | Analog/digital converting device |
| US6704829B1 (en) * | 1999-11-24 | 2004-03-09 | Alps Electric Co., Ltd. | Switch input processing module for switching signal transmission lines to transmit different types of signals |
| US20100235699A1 (en) * | 2009-03-06 | 2010-09-16 | Hitachi, Ltd. | Fault diagnosis apparatus and fault diagnosis method of multi-channel analog input/output circuit |
| JP2016001988A (en) * | 2014-06-11 | 2016-01-07 | ジョン、ヨンーギ | Surge protection device for communication in multiplex protection mode |
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Application publication date: 20190906 |