CN202694391U - Intelligent secret key apparatus - Google Patents
Intelligent secret key apparatus Download PDFInfo
- Publication number
- CN202694391U CN202694391U CN 201220108108 CN201220108108U CN202694391U CN 202694391 U CN202694391 U CN 202694391U CN 201220108108 CN201220108108 CN 201220108108 CN 201220108108 U CN201220108108 U CN 201220108108U CN 202694391 U CN202694391 U CN 202694391U
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- power supply
- power
- circuit
- key apparatus
- audio interface
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Abstract
The utility model discloses an intelligent secret key apparatus, comprising an audio frequency interface circuit, a power supply and a master control circuit. The power supply is connected with the master control circuit and provides the master control circuit with power. The audio frequency interface circuit is connected with the master control circuit and communicates with external equipment under the control of the master control circuit. The apparatus further comprises a power supply switch unit respectively connected with the audio frequency interface circuit and the power supply, and controls the connecting and disconnecting of the power supply based on input signals of the audio frequency interface circuit. The intelligent secret key apparatus provided by the utility model is capable of turning on or off power automatically, thereby realizing the objective of saving power.
Description
Technical field
The utility model relates to electronic technology field, relates in particular to a kind of intelligent key apparatus.
Background technology
Along with socioeconomic development, the demand of online transaction is more and more, for ensure online transaction as transfer accounts, the handling safety such as payment, the consumer can select to buy the safety information product of intelligent key apparatus such as USB KEY and so on.On the other hand; intelligent mobile terminal such as smart mobile phone, panel computer, notebook computer etc. have also been obtained flourish; these intelligent mobile terminals also can carry out online transaction by access network; in order to protect the safety of the online transaction that operates at these portable terminals, need too the intelligent key apparatus of similar USB KEY.But intelligent mobile terminal is for the ease of carrying, USB interface much is not set, and for the audio entertain mem function, generally all be provided with audio interface, so, intelligent key apparatus is to support the future development that intelligent mobile terminal is used by audio interface, the audio frequency shield that industry that Here it is is alleged, but this has also brought another problem simultaneously, USB interface is with power interface, so original USB KEY with USB interface can be by the power interface work to take power of USB interface, but audio interface is charged interface not generally, so need the intelligent key apparatus built-in power, the electric weight that these built-in power supplys store is limited, if close intelligent key apparatus so the user forgets after finishing using, the electric weight of its built-in power can deplete very soon, makes troubles for reusing of user also to increase the user to use the cost of intelligent key apparatus.
Summary of the invention
Fundamental purpose of the present utility model realizes automatically powering on or cutting off the power supply for a kind of intelligent key apparatus is provided, thereby reaches the purpose of power saving.
The utility model provides a kind of intelligent key apparatus, comprise audio interface circuit, power supply and governor circuit, power supply is connected with governor circuit, provides electric energy to governor circuit, audio interface circuit is connected with governor circuit, communicates with external device under the control of governor circuit; Also comprise connecting respectively described audio interface circuit and power supply, control the conducting of power supply and the power switch unit of disconnection according to the input signal of audio interface circuit.
Preferably, described power switch unit comprises on-off element, and described on-off element is discrete on-off element or with the chip of power switch function.
Preferably, described discrete on-off element is the P channel MOS tube.
Preferably, when described on-off element is the P channel MOS tube, the sound channel interface that is not used as voice communication in the audio interface circuit of described intelligent key apparatus is connected with the grid of described metal-oxide-semiconductor by a current-limiting resistance R1, the drain electrode of described metal-oxide-semiconductor connects positive source, the source electrode of described metal-oxide-semiconductor connects described governor circuit, series connection one pull-up resistor R2 between the drain and gate of described metal-oxide-semiconductor.
Preferably, described on-off element is during with the chip of power switch function, the sound channel interface that is not used as voice communication in the audio interface circuit of the Enable Pin of described chip by a current-limiting resistance R3 and described intelligent key apparatus is connected, the power input of described chip connects respectively the end of described power supply and pull-up resistor R4, the other end of described pull-up resistor R4 is connected between current-limiting resistance R3 and the Enable Pin, and the power output end of described chip connects described governor circuit.
Intelligent key apparatus of the present utility model is by arranging power switch unit, when the user passes through the audio interface access host with intelligent key apparatus, automatically work on power, the user audio interface is disconnected, when intelligent key apparatus is removed from main frame, the power supply of automatic cutout intelligent key apparatus, thus reach the purpose of power saving.
Description of drawings
Fig. 1 is the structural representation of the utility model intelligent key apparatus one embodiment;
Fig. 2 is the circuit diagram of the power switch unit when on-off element is metal-oxide-semiconductor among the utility model intelligent key apparatus one embodiment;
Fig. 3 is the circuit diagram of the power switch unit of on-off element for the chip of power switch function time the among the utility model intelligent key apparatus one embodiment.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is elaborated.Should be emphasized that: following explanation only is exemplary, rather than in order to limit scope of the present utility model and application.
With reference to Fig. 1, intelligent key apparatus one embodiment of the present invention is proposed, comprise audio interface circuit 30, power supply 20 and governor circuit 10.Described power supply 20 can be battery or other external power supplys, power supply 20 is connected with governor circuit 10, electric energy is provided for governor circuit 10, is appreciated that, power supply 20 is except providing the electric energy for governor circuit 10, can also give intelligent key apparatus other need the active circuit of electric energy that electric energy is provided.Audio interface circuit 30 is connected with governor circuit 10, follows with intelligent key apparatus to communicate by the main frame that audio port is connected under the control of governor circuit 10, and this main frame can be PC, smart mobile phone, panel computer or notebook computer etc.
Intelligent key apparatus also comprises power switch unit 40, and described power switch unit 40 connects respectively audio interface circuit 30 and power supply 20, is used for conducting and disconnection according to the input signal control power supply 30 of audio interface circuit 30.
Preferably, described power switch unit 40 comprises on-off element, and described on-off element can be for metal-oxide-semiconductor or with the chip of power switch function.
Preferably, described on-off element is P channel MOS tube Q1, the circuit connecting relation of power switch unit 40 as shown in Figure 2, intelligent key apparatus with audio interface, only come communication with sound channel in the left and right sound channels and recording channel, the another one sound channel is left a blank, and present embodiment is explained as example to use R channel to leave a blank as communication, L channel.In Fig. 2, be connected with the grid of metal-oxide-semiconductor Q1 after being not used as the L channel interface tandem current-limiting resistance R1 of voice communication in the audio interface circuit, input connects positive source VBAT as power supply in the drain electrode of metal-oxide-semiconductor Q1, the source electrode of metal-oxide-semiconductor Q1 connects governor circuit 10 as power supply output VCC_OUT, series connection pull-up resistor R2 between the drain and gate of metal-oxide-semiconductor Q1.Metal-oxide-semiconductor Q1 is operated on off state, and Audio_L_out is the L channel output of the main frame that is connected with intelligent key apparatus, and VBAT is battery supply, and VCC_OUT is out-put supply.When tone frequency channel wire inserts the audio port of main frame, it is low level under the Audio_L_ou default conditions, also can be by its output low level of software control, be used for controlling the conducting of P channel MOS tube drain switch, VCC_OUT ≈ VBAT is when tone frequency channel wire is extracted, the drain electrode of P channel MOS tube is drawn high by pull-up resistor R2, cut-off output, VCC_OUT is output as zero, reaches the power saving purpose.
Be appreciated that, being described as the P channel MOS tube as example take on-off element of present embodiment, but and be not used in and limit on-off element and only be the P channel MOS tube, the on-off element that other this areas are commonly used, also can be used for the utility model such as N-channel MOS pipe, positive-negative-positive triode, NPN triode or thyristor etc., play equally the effect of control power turn-on and disconnection, its circuit connecting relation, for the habitual annexation in this area, do not repeat them here.
Preferably, be appreciated that, described on-off element also can be the chip U1 with the power switch function, only come communication with R channel and recording channel with intelligent key apparatus, the situation that L channel is left a blank is example, the circuit connecting relation of power switch unit 40 comprises as described in Figure 3: the Enable Pin of chip U1
Be connected by the sound channel interface Audio_L_out that is not used as voice communication in current-limiting resistance R3 and the audio interface circuit, pull-up resistor R4 one end respectively with the Enable Pin of current-limiting resistance R3 and chip U1
Connect, the other end connects respectively the power supply input IN port of power supply VBAT and chip U1.The power output end OUT of chip U1 connects governor circuit 10.When tone frequency channel wire inserts the audio port of main frame, it is low level under the Audio_L_ou default conditions, also can be by its output low level of software control, the chip U1 that enables for the control low level starts working, output to the governor circuit 10 that is connected with power output end OUT by the power input VBAT power taking that is connected with power supply 20, when tone frequency channel wire is extracted, the Enable Pin of chip U1
R4 draws high by pull-up resistor, quits work, and the power output end OUT of chip U1 stops to export electric energy, reaches the power saving purpose.
Intelligent key apparatus of the present utility model is by arranging power switch unit, when the user passes through the audio interface access host with intelligent key apparatus, automatically work on power, the user audio interface is disconnected, when intelligent key apparatus is removed from main frame, the power supply of automatic cutout intelligent key apparatus, thus reach the purpose of power saving.
The above only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (5)
1. an intelligent key apparatus comprises audio interface circuit, power supply and governor circuit, and power supply is connected with governor circuit, provides electric energy to governor circuit, and audio interface circuit is connected with governor circuit, communicates with external device under the control of governor circuit; It is characterized in that, also comprise connecting respectively described audio interface circuit and power supply, control the conducting of power supply and the power switch unit of disconnection according to the input signal of audio interface circuit.
2. device according to claim 1 is characterized in that, described power switch unit comprises on-off element, and described on-off element is discrete on-off element or with the chip of power switch function.
3. device according to claim 2 is characterized in that, described discrete on-off element is the P channel MOS tube.
4. device according to claim 3, it is characterized in that, when described on-off element is the P channel MOS tube, the sound channel interface that is not used as voice communication in the audio interface circuit of described intelligent key apparatus is connected with the grid of described metal-oxide-semiconductor by a current-limiting resistance R1, the drain electrode of described metal-oxide-semiconductor connects positive source, the source electrode of described metal-oxide-semiconductor connects described governor circuit, series connection one pull-up resistor R2 between the drain and gate of described metal-oxide-semiconductor.
5. device according to claim 2, it is characterized in that, described on-off element is during with the chip of power switch function, the sound channel interface that is not used as voice communication in the audio interface circuit of the Enable Pin of described chip by a current-limiting resistance R3 and described intelligent key apparatus is connected, the power input of described chip connects respectively the end of described power supply and pull-up resistor R4, the other end of described pull-up resistor R4 is connected between current-limiting resistance R3 and the Enable Pin, and the power output end of described chip connects described governor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220108108 CN202694391U (en) | 2012-03-21 | 2012-03-21 | Intelligent secret key apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220108108 CN202694391U (en) | 2012-03-21 | 2012-03-21 | Intelligent secret key apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202694391U true CN202694391U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220108108 Expired - Fee Related CN202694391U (en) | 2012-03-21 | 2012-03-21 | Intelligent secret key apparatus |
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| Country | Link |
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| CN (1) | CN202694391U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607680A (en) * | 2013-11-13 | 2014-02-26 | 北京旋极信息技术股份有限公司 | An audio frequency apparatus |
| CN103680553A (en) * | 2013-12-23 | 2014-03-26 | 北京华大信安科技有限公司 | Power supply control circuit, power supply control device and power supply control method for audio interface equipment |
| CN104715184A (en) * | 2015-03-04 | 2015-06-17 | 天地融科技股份有限公司 | Secret key equipment, data switching device, component and system and equipment startup method |
-
2012
- 2012-03-21 CN CN 201220108108 patent/CN202694391U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607680A (en) * | 2013-11-13 | 2014-02-26 | 北京旋极信息技术股份有限公司 | An audio frequency apparatus |
| CN103607680B (en) * | 2013-11-13 | 2017-10-17 | 北京旋极信息技术股份有限公司 | A kind of audio devices |
| CN103680553A (en) * | 2013-12-23 | 2014-03-26 | 北京华大信安科技有限公司 | Power supply control circuit, power supply control device and power supply control method for audio interface equipment |
| CN104715184A (en) * | 2015-03-04 | 2015-06-17 | 天地融科技股份有限公司 | Secret key equipment, data switching device, component and system and equipment startup method |
| WO2016138834A1 (en) * | 2015-03-04 | 2016-09-09 | 天地融科技股份有限公司 | Secret key device, data switching apparatus, component and system and device starting method |
| CN104715184B (en) * | 2015-03-04 | 2018-04-27 | 天地融科技股份有限公司 | Key devices, data switching device, component and system and equipment starting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20190321 |
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| CF01 | Termination of patent right due to non-payment of annual fee |