CN103763661B - Intelligent cipher key equipment and audio frequency signal transmission system - Google Patents
Intelligent cipher key equipment and audio frequency signal transmission system Download PDFInfo
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- CN103763661B CN103763661B CN201410042213.0A CN201410042213A CN103763661B CN 103763661 B CN103763661 B CN 103763661B CN 201410042213 A CN201410042213 A CN 201410042213A CN 103763661 B CN103763661 B CN 103763661B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2410/00—Microphones
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Input From Keyboards Or The Like (AREA)
- Telephone Function (AREA)
Abstract
The invention discloses a kind of intelligent cipher key equipment and audio frequency signal transmission system, the intelligent cipher key equipment includes：Safety chip, the first partial pressure unit, the second partial pressure unit, voltage processing circuitry and COBBAIF, one end of first partial pressure unit is connected with the output end and power supply of safety chip respectively, and input of the other end respectively with the second partial pressure unit and voltage processing circuitry is connected；One end of second partial pressure unit is connected with the first partial pressure unit, other end ground connection；Two output ends of voltage processing circuitry are connected with Mike's pin and ground pin of COBBAIF respectively；The voltage of the voltage more than the consumption of the second partial pressure unit of the first partial pressure unit consumption.By partial pressure unit and the signal voltage amplitude of voltage processing circuitry reduction terminal audio frequency interface, make it without departing from AD sample ranges, it is to avoid the generation of overshoot phenomenon.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of intelligent cipher key equipment and audio frequency signal transmission system.
Background technology
At present, intelligent cipher key equipment（For example, key）Can be carried out by COBBAIF with the terminal such as mobile phone, panel computer
Communication.After intelligent cipher key equipment is connected with terminal by COBBAIF, audio signal is sent to terminal, terminal is needed to reception
Audio signal carries out AD（Alternate-Direct）Sampling.If voltage magnitude is excessive, beyond AD sample ranges, it may appear that mistake
Punching, causes the signal for obtaining distortion compared with originally transmitted audio signal of sampling, and then terminal to obtain correctly
Signal, data transmission fails.
The content of the invention
The invention provides a kind of intelligent cipher key equipment and audio frequency signal transmission system, at least to solve intelligent cipher key equipment
When sending audio signal to terminal, voltage magnitude causes the problem of overshoot beyond AD sample ranges.
What technical scheme was specifically realized in：
According to an aspect of the invention, there is provided a kind of intelligent cipher key equipment, including：Safety chip, the first partial pressure list
Unit, the second partial pressure unit, voltage processing circuitry and COBBAIF, one end of first partial pressure unit respectively with the safe core
The output end and power supply of piece are connected, the other end respectively with the input of second partial pressure unit and the voltage processing circuitry
End is connected；One end of second partial pressure unit is connected with first partial pressure unit, other end ground connection；The voltage treatment electricity
Two output ends on road are connected with Mike's pin and ground pin of the COBBAIF respectively；Wherein, the first partial pressure list
The voltage of the voltage more than second partial pressure unit consumption of unit's consumption.
Additionally, the voltage processing circuitry includes：First process circuit and second processing circuit, first process circuit
With second processing circuit attenuator circuit each other, the input of first process circuit is defeated with the second processing circuit
Enter end to be connected.
Additionally, first process circuit uses filter circuit and/or bleeder circuit, the second processing circuit is using filter
Wave circuit and/or bleeder circuit.
According to another aspect of the present invention, there is provided a kind of intelligent cipher key equipment, including：Safety chip, the first partial pressure
Unit, the second partial pressure unit, the 3rd partial pressure unit, voltage processing circuitry and COBBAIF, one end of first partial pressure unit
It is connected with power supply, output end of the other end respectively with second partial pressure unit and the safety chip is connected；Described second
One end of partial pressure unit is connected with first partial pressure unit, the other end respectively with the 3rd partial pressure unit and the voltage
The input of process circuit is connected；One end of 3rd partial pressure unit is connected with second partial pressure unit, other end ground connection；
Two output ends of the voltage processing circuitry are connected with Mike's pin and ground pin of the COBBAIF respectively；Wherein,
The voltage that the voltage of the first partial pressure unit consumption is equal to second partial pressure unit consumption disappears with the 3rd partial pressure unit
The voltage sum of consumption, and the voltage of second partial pressure unit consumption is more than the voltage that the 3rd partial pressure unit is consumed.
Additionally, the voltage processing circuitry includes：First process circuit and second processing circuit, first process circuit
With second processing circuit attenuator circuit each other, the input of first process circuit is defeated with the second processing circuit
Enter end to be connected.
Additionally, first process circuit uses filter circuit and/or bleeder circuit, the second processing circuit is using filter
Wave circuit and/or bleeder circuit.
According to a further aspect of the invention, there is provided a kind of audio frequency signal transmission system, including any of the above-described kind intelligence
Key devices and the terminal with COBBAIF, the COBBAIF of the COBBAIF of the intelligent cipher key equipment and the terminal
Match, the intelligent cipher key equipment is connected and is communicated by its COBBAIF with the terminal.
Above-mentioned technical proposal provided by the present invention can be seen that the invention provides a kind of intelligent cipher key equipment and audio
Signal transmission system, intelligent cipher key equipment carries out partial pressure by partial pressure unit to sent audio upward signal, and further
The voltage magnitude on Mike's pin of intelligent cipher key equipment COBBAIF is input to by voltage processing circuitry reduction, that is, is dropped
The voltage magnitude of the signal that Mike's pin of low terminal audio frequency interface is received, makes it without departing from AD sample ranges, it is to avoid
The appearance of overshoot phenomenon.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will use needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the schematic diagram of the intelligent cipher key equipment that the embodiment of the present invention one is provided；
Fig. 2 is the structural representation of the intelligent cipher key equipment that the embodiment of the present invention one is provided；
Fig. 3 is the structural representation one of the voltage processing circuitry that the embodiment of the present invention one is provided；
Fig. 4 is the structural representation two of the voltage processing circuitry that the embodiment of the present invention one is provided；
Fig. 5 is the schematic diagram of the intelligent cipher key equipment that the embodiment of the present invention two is provided；
Fig. 6 is the structural representation of the intelligent cipher key equipment that the embodiment of the present invention two is provided.
Specific embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Inventive embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score,
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of and describes the present invention and simplify to describe, rather than instruction or dark
Showing the device or element of meaning must have specific orientation, with specific azimuth configuration and operation therefore it is not intended that right
Limitation of the invention.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative
Importance or quantity or position.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment one
A kind of intelligent cipher key equipment is present embodiments provided, as shown in figure 1, the intelligent cipher key equipment includes：Safety chip,
First partial pressure unit, the second partial pressure unit, voltage processing circuitry and COBBAIF（It can be audio jack）.
One end of first partial pressure unit respectively with the output end and power supply of safety chip（VCC）It is connected, other end difference
Input with the second partial pressure unit and voltage processing circuitry is connected；One end of second partial pressure unit and the first partial pressure unit phase
Even, other end ground connection；Two output ends of voltage processing circuitry respectively with Mike's pin of COBBAIF（MIC）And ground pin
（GND）It is connected（The L channel pin and R channel pin of COBBAIF not shown in Fig. 1）.The voltage of the first partial pressure unit consumption
More than the voltage that the second partial pressure unit is consumed.
It should be noted that one end of the second partial pressure unit ground connection can be connected with the ground pin of COBBAIF, i.e.,
That one end of second partial pressure unit ground connection altogether, can so reduce solder joint with the ground pin of COBBAIF, reduce circuit board
Volume.The COBBAIF of intelligent cipher key equipment can intelligent cipher key equipment carry in itself, intelligent cipher key equipment can be with
Including USB interface, COBBAIF is connected by patchcord.
Safety chip, the first partial pressure unit and the second partial pressure unit constitute audio upward signal generating means, voltage treatment
Circuit is used to decay the upward signal that audio upward signal generating means sends, and audio upward signal is by the first partial pressure
After unit, the second partial pressure unit and voltage processing circuitry, obtain suitable signal amplitude and send to terminal, realize audio signal
Uplink.
First partial pressure unit and the second partial pressure unit are consuming components, such as resistance and/or diode etc., below with Fig. 2
Illustrated as a example by shown circuit.
Fig. 2 is the structural representation of the intelligent cipher key equipment that the embodiment of the present invention one is provided, as shown in Fig. 2 being made with resistance
To be illustrated as a example by partial pressure unit, the first partial pressure unit is resistance R1, and the second partial pressure unit is resistance R2.One end of resistance R1
Be connected with the output end and power supply of safety chip respectively, the other end respectively with resistance R2 and the input of voltage processing circuitry
It is connected；One end of resistance R2 is connected with resistance R1, other end ground connection.Resistance of the resistance of resistance R1 more than resistance R2, i.e. R1 disappears
The voltage of consumption is simultaneously not specifically limited more than the voltage that R2 is consumed, the ratio of resistance R1 and resistance R2.
Partial pressure is carried out by resistance, the signal voltage amplitude for being input to voltage processing circuitry is reduced, and then by voltage
Process circuit further reduces the voltage magnitude being input on Mike's pin of COBBAIF, when the audio of intelligent cipher key equipment is inserted
During the audio sockets of head insertion terminal, Mike's pin of audio jack is connected with Mike's pin of audio sockets, that is, reduces
The voltage magnitude of the signal that Mike's pin of terminal audio frequency socket is received, so as to ensure not over AD sample ranges, it is to avoid
There is overshoot phenomenon.
Certainly, the first partial pressure unit and the second partial pressure unit are not limited to the circuit shown in Fig. 2 in the present embodiment, as long as
The circuit that can realize partial pressure purpose by consuming components is used as the scope of protection of the invention, for example, the first partial pressure unit and the
Two partial pressure units are respectively resistance and diode.
Voltage processing circuitry includes：First process circuit and second processing circuit, the first process circuit and second processing electricity
Road attenuator circuit each other, the input of the first process circuit is connected with the input of second processing circuit（That is the first process circuit
With the common input of second processing circuit）, the output end of the first process circuit and the output end of second processing circuit then respectively with sound
Mike's pin of frequency interface is connected with ground pin.
First process circuit can use filtered electrical using filter circuit and/or bleeder circuit, second processing circuit
Road and/or bleeder circuit, illustrate respectively with reference to Fig. 3 and Fig. 4.
As shown in figure 3, voltage processing circuitry can be realized using bleeder circuit, including electric capacity C1, electric capacity C2 and electric capacity C3.
The audio upward signal generating means being made up of safety chip, the first partial pressure unit and the second partial pressure unit passes through electric capacity C1 and electricity
Hold Mike's pin that C2 is connected to COBBAIF, the ground pin of COBBAIF is connected to by electric capacity C1 and electric capacity C3.In Fig. 3
In, the first process circuit includes C1 and C2, and second processing circuit includes C1 and C3.By the first partial pressure unit and the second partial pressure list
Audio signal after first partial pressure（The audio upward signal that i.e. intelligent cipher key equipment sends to terminal）Further by C1's and C2
Partial pressure, signal amplitude diminishes, and sends to Mike's pin, and then ensures that the amplitude of the audio signal that terminal is received is adopted without departing from AD
Sample scope.
Voltage processing circuitry can be the capacitor equivalent of symmetric circuit, i.e. C2 and C3；Can also be asymmetric circuit, i.e. C2
With the electric capacity of C3.It is, of course, also possible to bleeder circuit is realized using resistance, likewise, the bleeder circuit realized using resistance
Can be symmetric circuit, or asymmetric circuit, here is omitted.
As shown in figure 4, voltage processing circuitry is realized using filter circuit, including electric capacity C4, resistance R3 and resistance R4.By pacifying
The audio upward signal generating means that full chip, the first partial pressure unit and the second partial pressure unit are constituted passes through electric capacity C4 and resistance R3
Mike's pin is connected to, ground pin is connected to by electric capacity C4 and resistance R4.In fig. 4, the first process circuit include C4 and
R3, second processing circuit includes C4 and R4.Audio signal after the first partial pressure unit and the second partial pressure unit partial pressure（That is intelligence
The audio upward signal that energy key devices send to terminal）Further by the filtering of C4 and R3, signal amplitude diminishes, and sends extremely
Mike's pin, and then ensure the amplitude of the audio signal that terminal is received without departing from AD sample ranges.Voltage processing circuitry can be with
It is symmetric circuit, or asymmetric circuit.
Certainly, voltage processing circuitry is not limited to the circuit shown in Fig. 3 and Fig. 4 in the present embodiment, as long as can realize declining
Subtract the circuit of purpose as the scope of protection of the invention.In addition, voltage processing circuitry can also use filter circuit and partial pressure
The mode that circuit is combined is realized.
The intelligent cipher key equipment that the present embodiment is provided is by the first partial pressure unit and the second partial pressure unit to sent sound
Frequency upward signal carries out partial pressure, and the wheat of intelligent cipher key equipment COBBAIF is further input to by voltage processing circuitry reduction
Voltage magnitude on gram pin, that is, the voltage magnitude of the signal that Mike's pin of terminal audio frequency interface is received is reduced, from
And ensure not over AD sample ranges, it is to avoid there is overshoot phenomenon.
Embodiment two
The present embodiment is that the intelligent cipher key equipment of the present embodiment includes three partial pressure units with the difference of embodiment one,
Likewise, partial pressure unit is consuming components, such as resistance and/or diode etc..
As shown in figure 5, the intelligent cipher key equipment of the present embodiment includes：Safety chip, the first partial pressure unit, the second partial pressure list
Unit, the 3rd partial pressure unit, voltage processing circuitry and COBBAIF.One end of first partial pressure unit and power supply（VCC）It is connected, it is another
The output end respectively with the second partial pressure unit and safety chip is held to be connected；One end of second partial pressure unit and the first partial pressure unit
It is connected, input of the other end respectively with the 3rd partial pressure unit and voltage processing circuitry is connected；One end of 3rd partial pressure unit
It is connected with the second partial pressure unit, other end ground connection；Two output ends of voltage processing circuitry are managed with the Mike of COBBAIF respectively
Pin is connected with ground pin.The voltage of the first partial pressure unit consumption is equal to the voltage and the 3rd partial pressure list of the second partial pressure unit consumption
The voltage sum of unit's consumption, and the voltage of the second partial pressure unit consumption is more than the voltage that the 3rd partial pressure unit is consumed.
It should be noted that one end of the 3rd partial pressure unit ground connection can be connected with the ground pin of COBBAIF, i.e.,
That one end of 3rd partial pressure unit ground connection altogether, can so reduce solder joint with the ground pin of COBBAIF, reduce circuit board
Volume.
Illustrated by taking circuit shown in Fig. 6 as an example below.
Fig. 6 is the structural representation of the intelligent cipher key equipment that the embodiment of the present invention two is provided, as shown in fig. 6, being made with resistance
To be illustrated as a example by partial pressure unit, the first partial pressure unit is resistance R1, and the second partial pressure unit is resistance R2, the 3rd partial pressure unit
It is resistance R3.One end of R1 and power supply（VCC）It is connected, output end of the other end respectively with R2 and safety chip is connected；R2's
One end is connected with R1, and input of the other end respectively with R3 and voltage processing circuitry is connected；One end of R3 is connected with R2, another
End ground connection.The resistance of R1 is equal to R2 and R3 resistance sums, and R2 resistance of the resistance more than R3, i.e. the voltage of R1 consumption is equal to R2
The voltage sum that the voltage of consumption is consumed with R3, and the voltage of R2 consumption is more than the voltage that R3 is consumed, the ratio of R2 and R3 is not
It is specifically limited.
Certainly, the first partial pressure unit, the second partial pressure unit and the 3rd partial pressure unit are not limited to Fig. 6 institutes in the present embodiment
The circuit for showing, as long as the circuit that can realize partial pressure purpose by consuming components is used as the scope of protection of the invention.
Voltage processing circuitry is identical with embodiment one, and here is omitted.
The intelligent cipher key equipment that the present embodiment is provided passes through the first partial pressure unit, the second partial pressure unit and the 3rd partial pressure unit
Partial pressure is carried out to sent audio upward signal, and intelligent cipher key equipment is further input to by voltage processing circuitry reduction
Voltage magnitude on Mike's pin of COBBAIF, that is, reduce the signal of Mike's pin reception of terminal audio frequency interface
Voltage magnitude, so as to ensure not over AD sample ranges, it is to avoid overshoot phenomenon occur.In addition, the consumption of the first partial pressure unit
Voltage is equal to the voltage sum of voltage and the 3rd the partial pressure unit consumption of the second partial pressure unit consumption so that the first partial pressure unit and
The magnitude of voltage of the junction of the output end of safety chip is 0.5VCC, such that it is able to avoid voltage lifting, direct current shake occurs.
Embodiment three
A kind of audio frequency signal transmission system is present embodiments provided, the system includes intelligent cipher key equipment and connect with audio
The terminal of mouth, wherein, intelligent cipher key equipment is the intelligent cipher key equipment of embodiment one or the description of embodiment two.Intelligent cipher key equipment
COBBAIF match with the COBBAIF of terminal, intelligent cipher key equipment is connected and is led to by its COBBAIF with terminal
Letter, specifically, the COBBAIF of intelligent cipher key equipment（It can be audio jack）Each pin（L channel pin, R channel
Pin, Mike's pin and ground pin）Respectively with the COBBAIF of terminal（Can be audio sockets）Corresponding pin connection, with
Realize normal data transfer.Also, audio signal is by after the processing of circuit in the intelligent cipher key equipment, it is ensured that terminal
The voltage magnitude of the audio signal of reception is not over AD sample ranges, it is to avoid overshoot phenomenon occur.
Terminal can be notebook computer, panel computer, mobile phone, intelligent watch, intelligent glasses etc. with COBBAIF
Equipment.
It should be appreciated that each several part of the invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In implementation method, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realized.If for example, realized with hardware, and in another embodiment, can be with well known in the art
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array（PGA）, scene
Programmable gate array（FPGA）Deng.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from principle of the invention and objective
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.The scope of the present invention
By appended claims and its equivalent limit.
Claims (7)
1. a kind of intelligent cipher key equipment, it is characterised in that including：Safety chip, the first partial pressure unit, the second partial pressure unit, electricity
Pressure process circuit and COBBAIF,
The safety chip, first partial pressure unit and second partial pressure unit constitute audio upward signal generating means；
One end of first partial pressure unit is connected with the output end and power supply of the safety chip respectively, the other end respectively with
The input of second partial pressure unit and the voltage processing circuitry is connected；
One end of second partial pressure unit is connected with first partial pressure unit, other end ground connection；
Two output ends of the voltage processing circuitry are connected with Mike's pin and ground pin of the COBBAIF respectively；
Wherein, the voltage of the voltage more than second partial pressure unit consumption of the first partial pressure unit consumption.
2. intelligent cipher key equipment according to claim 1, it is characterised in that the voltage processing circuitry includes：At first
Reason circuit and second processing circuit, first process circuit and the second processing circuit attenuator circuit, described first each other
The input of process circuit is connected with the input of the second processing circuit.
3. intelligent cipher key equipment according to claim 2, it is characterised in that first process circuit uses filter circuit
And/or bleeder circuit, the second processing circuit is using filter circuit and/or bleeder circuit.
4. a kind of intelligent cipher key equipment, it is characterised in that including：Safety chip, the first partial pressure unit, the second partial pressure unit,
Three partial pressure units, voltage processing circuitry and COBBAIF,
The safety chip, first partial pressure unit, second partial pressure unit and the 3rd partial pressure unit constitute audio
Upward signal generating means；
One end of first partial pressure unit is connected with power supply, the other end respectively with second partial pressure unit and the safety
The output end of chip is connected；
One end of second partial pressure unit is connected with first partial pressure unit, the other end respectively with the 3rd partial pressure unit
And the input of the voltage processing circuitry is connected；
One end of 3rd partial pressure unit is connected with second partial pressure unit, other end ground connection；
Two output ends of the voltage processing circuitry are connected with Mike's pin and ground pin of the COBBAIF respectively；
Wherein, the voltage of first partial pressure unit consumption is equal to the voltage of second partial pressure unit consumption with described 3rd point
The voltage sum of pressure unit consumption, and the voltage of second partial pressure unit consumption is more than the electricity that the 3rd partial pressure unit is consumed
Pressure.
5. intelligent cipher key equipment according to claim 4, it is characterised in that the voltage processing circuitry includes：At first
Reason circuit and second processing circuit, first process circuit and the second processing circuit attenuator circuit, described first each other
The input of process circuit is connected with the input of the second processing circuit.
6. intelligent cipher key equipment according to claim 5, it is characterised in that first process circuit uses filter circuit
And/or bleeder circuit, the second processing circuit is using filter circuit and/or bleeder circuit.
7. a kind of audio frequency signal transmission system, it is characterised in that set including the intelligent key described in any one of claim 1 to 6
The standby and terminal with COBBAIF, the COBBAIF phase of the COBBAIF of the intelligent cipher key equipment and the terminal
Match somebody with somebody, the intelligent cipher key equipment is connected and is communicated by its COBBAIF with the terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410042213.0A CN103763661B (en) | 2014-01-28 | 2014-01-28 | Intelligent cipher key equipment and audio frequency signal transmission system |
| PCT/CN2015/071202 WO2015113473A1 (en) | 2014-01-28 | 2015-01-21 | Smart key device and audio signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410042213.0A CN103763661B (en) | 2014-01-28 | 2014-01-28 | Intelligent cipher key equipment and audio frequency signal transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN103763661A CN103763661A (en) | 2014-04-30 |
| CN103763661B true CN103763661B (en) | 2017-06-06 |
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| CN201410042213.0A Active CN103763661B (en) | 2014-01-28 | 2014-01-28 | Intelligent cipher key equipment and audio frequency signal transmission system |
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| WO (1) | WO2015113473A1 (en) |
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| CN103763661B (en) * | 2014-01-28 | 2017-06-06 | 天地融科技股份有限公司 | Intelligent cipher key equipment and audio frequency signal transmission system |
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| KR20120057457A (en) * | 2010-11-26 | 2012-06-05 | 현대자동차주식회사 | Avn system for installing application software and operating method thereof |
| CN102223234B (en) * | 2011-06-17 | 2013-11-20 | 飞天诚信科技股份有限公司 | Electronic signature system and method based on audio communication |
| CN102255731A (en) * | 2011-07-14 | 2011-11-23 | 深圳市星龙基电子技术有限公司 | Intelligent key device based on wired earphone interface |
| CN103379488A (en) * | 2012-04-26 | 2013-10-30 | 国民技术股份有限公司 | Secret key device and utilization method |
| CN103376876B (en) * | 2012-04-26 | 2016-03-30 | 国民技术股份有限公司 | Audio Interface Unit and method for managing power supply thereof |
| CN103378933B (en) * | 2012-04-26 | 2016-12-14 | 国民技术股份有限公司 | Coding/decoding method, decoder module and signal processing method, signal processing apparatus |
| CN202720898U (en) * | 2012-06-13 | 2013-02-06 | 天地融科技股份有限公司 | Audio signal transmitting device |
| CN203206234U (en) * | 2013-04-26 | 2013-09-18 | 施宝新 | Precise voltage division circuit, and wireless transmitting, receiving circuit applying same |
| CN103763661B (en) * | 2014-01-28 | 2017-06-06 | 天地融科技股份有限公司 | Intelligent cipher key equipment and audio frequency signal transmission system |
| CN103780995A (en) * | 2014-01-28 | 2014-05-07 | 天地融科技股份有限公司 | Audio signal output device |
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2014
- 2014-01-28 CN CN201410042213.0A patent/CN103763661B/en active Active
-
2015
- 2015-01-21 WO PCT/CN2015/071202 patent/WO2015113473A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740188A (en) * | 2012-06-16 | 2012-10-17 | 天地融科技股份有限公司 | Device and method for up-linking audio signal through audio interface |
| CN103390303A (en) * | 2013-06-28 | 2013-11-13 | 上海爱信诺航芯电子科技有限公司 | Financial key based on audio frequency and USB data transmission and control method thereof |
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| Publication number | Publication date |
|---|---|
| WO2015113473A1 (en) | 2015-08-06 |
| CN103763661A (en) | 2014-04-30 |
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