CN2901710Y - Radio frequency card judging circuit - Google Patents
Radio frequency card judging circuit Download PDFInfo
- Publication number
- CN2901710Y CN2901710Y CNU2006201154953U CN200620115495U CN2901710Y CN 2901710 Y CN2901710 Y CN 2901710Y CN U2006201154953 U CNU2006201154953 U CN U2006201154953U CN 200620115495 U CN200620115495 U CN 200620115495U CN 2901710 Y CN2901710 Y CN 2901710Y
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- CN
- China
- Prior art keywords
- pulse signal
- antenna
- radio
- frequency card
- balance reference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The utility model relates to a deciding circuit for RF card, aimed at solving the problem of the high power or low efficiency of the deciding circuit for RF card in existence, and the utility model of RF card deciding circuit comprises a pulse signal generator which generates periodical pulse signals, a checking antenna connected electrically with the pulse signal generator on whom the magnetic induced section can be formed when the antenna receives the signals from the pulse signal generator; a balancing reference antenna connected electrically with pulse signal generator on whom the magnetic induced section can be formed when the antenna receives the signals from the pulse signal generator; a pair of comparing devices respectively connected with the checking antenna and the balancing reference antenna are used to compare the signals from the checking antenna and the balancing reference antenna. By applying the structure above, the utility model of deciding circuit can automatically, quickly detect whether the RF card enters the magnetic induced section decreasing the power consumed.
Description
Technical field
The utility model relates to a kind of electric radio-frequency card decision circuitry.
Background technology
In the application of radio-frequency card, especially in mobile device or low power consuming devices, adopt the radio-frequency card technology to have a bigger technical problem simultaneously easily, that is exactly the problem of power consumption and quick response.
Because radio-frequency card relies on the radio-frequency antenna energize, and the information in the card is fed back in the radio-frequency (RF) base station in the mode of radio frequency equally.Radio-frequency (RF) base station is emitted energy continuously, snaps into the radio frequency zone so that detected.Could start read-write operation.Finish the read-write process of radio-frequency card.In actual use, radio-frequency card be seldom the time in the radio frequency zone.For this reason, radiofrequency field to be open at certainly in the most of the time be catabiotic in vain.Especially in some low power consuming devices.In intellectual water meter, require average current consumption below 10uA, opening radiofrequency field for a long time obviously is unaccommodated (general radiofrequency field is wanted the electric current of tens mA).
For this reason, adopt the mode of manual pushbutton in many products, equipment does not start radio frequency when working at ordinary times.Operating current is very little, when needs carry out read-write card, presses " button " on the equipment, and announcement apparatus starts radiofrequency field, reads and writes the radio-frequency card operation.Though this method has solved problem, needs manual intervention, use very inconveniently, and the non-contacting advantage of radio-frequency card covered.The user is difficult to accept.
Also some technological means in a kind of scheme of announcing, is deployed the scheme of a magnetic patch in card in ZL00232597.7.Thereby the mode that magnetic induction switch realizes declaring card is installed on the card read-write terminal.This method needs special encapsulation card.Can only adopt at certain special occasions.And the magnetic patch position need definitely just can be used near magnetic switch in using, and therefore difficulty is all compared in processing and use.
The mode that some employing software timings are opened the Card Reader circuit, owing to card image detects reasons such as needing a plurality of initialization of register and opening process time length, the meeting holding time is many, thus consumed power also can be many.And the software control cycle can't be selected, or the cycle is short, do not realize the purpose of low-power consumption, or the cycle is long, can feel during use to pause, and breaks down and take for, and makes troubles to use.
The utility model content
At above-mentioned the problems of the prior art and deficiency, the purpose of this utility model is the radio-frequency card decision circuitry that proposes a kind of low power consumption high efficiency.
In order to address the above problem, the utility model proposes a kind of radio-frequency card decision circuitry, comprising:
Pulse signal generation device is used to produce periodic pulse signal;
Detect antenna, be electrically connected, behind the pulse signal that receives pulse signal generation device, produce the magnetic induction district with described pulse signal generation device;
The balance reference antenna is electrically connected with described pulse signal generation device, behind the pulse signal that receives pulse signal generation device, produces the magnetic induction district; Described detection antenna is identical with balance reference antenna structure
Comparison means is electrically connected with described detection antenna and described balance reference antenna respectively, is used for the signal of more described detection antenna and balance reference antenna;
Wherein, described pulse signal generation device comprises: pulse signal generator is used to produce pulse signal;
Wherein, described pulse signal generation device also comprises:
Control circuit is electrically connected with described pulse signal generator, is used for behind the cyclic pulse signal that pulse signal generator produces control power amplifiers and periodically works.
Power amplification circuit is electrically connected with described control circuit, and is electrically connected with described detection antenna and described balance reference antenna respectively, in order to enough power to be provided, with the electric current that provides described detection antenna and described balance reference antenna to need.
Wherein, described power amplification circuit is a triode.
Wherein, described power amplification circuit also comprises band pass filter.
Wherein, described comparison means comprises:
Amplitude, phase comparator are used for the signal of described detection antenna and balance reference antenna is compared;
The pulse follower is used for exporting a pulse signal when the signal of described detection antenna and balance reference antenna is inequality.
Wherein, described detection antenna and balance reference antenna gap are provided with, so that radio-frequency card can not enter the magnetic induction district of balance reference antenna when entering the magnetic induction district of detecting antenna.
The utility model proposes a kind of radio-frequency card decision circuitry, in prior art, the radio-frequency card decision circuitry exists and can't detect automatically or power consumption is big or problem of slow response and designing.The radio-frequency card decision circuitry that the utility model proposes is provided with the pulse signal generation device of one-period property pulsing signal, and adopts the identical double antenna design of structure, produces identical magnetic induction district when receiving the pulse signal of pulse signal generation device.When radio-frequency card enters the magnetic induction district of detecting antenna, the output signal that detects antenna can produce difference with the output signal of balance reference antenna on amplitude and phase place, compare by the output signal of comparison means two antennas, if the output signal of two antennas then sign inequality has radio-frequency card to enter the magnetic induction district of detecting antenna, at this moment, the pulse follower is exported a pulse signal, starts the operation to radio-frequency card.For fast reaction speed, the generating period of pulse signal generation device of the present utility model was made as 0.0001 second or littler.Adopt said structure, radio frequency decision circuitry of the present utility model can be automatically, fast detecting enters the magnetic induction district to radio-frequency card, and pulse signal generation device adopts a signal amplifier, intermittently produces signal, reduced power consumption.
Description of drawings
Fig. 1 is a radio-frequency card decision circuitry module map of the present utility model;
Fig. 2 is a pulse signal generation device circuit diagram in the radio-frequency card decision circuitry preferred embodiment of the present utility model;
Fig. 3 detects antenna, balance reference antenna, comparison means circuit diagram in the radio-frequency card decision circuitry preferred embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
The utility model preferred embodiment comprises as shown in Figure 1 with lower module:
Pulse signal generation device is used to produce periodic pulse signal;
Detect antenna, be electrically connected, behind the pulse signal that receives pulse signal generation device, produce the magnetic induction district with described pulse signal generation device;
The balance reference antenna is electrically connected with described pulse signal generation device, behind the pulse signal that receives pulse signal generation device, produces the magnetic induction district;
Comparison means is electrically connected with described detection antenna and described balance reference antenna respectively, is used for the signal of more described detection antenna and balance reference antenna;
Wherein, described detection antenna and gap identical with balance reference antenna structure is provided with, so that radio-frequency card can not enter the magnetic induction district of balance reference antenna when entering the magnetic induction district of detecting antenna.
Adopt said structure, pulse signal generation device joint detection antenna and balance reference antenna, pulse signal are sent out transmitting apparatus generation cyclic pulse signal and are transferred to identical detection antenna of structure and balance reference antenna respectively.It is identical with balance reference antenna structure and have an identical pumping signal to detect antenna, produce identical magnetic induction district, and detecting antenna and balance reference antenna is that the gap is provided with, when radio-frequency card enters the magnetic induction district of detecting antenna, because produce the signal coupling between radio-frequency card and the detection antenna, the output signal that detects antenna can produce difference with the output signal of balance reference antenna on amplitude and phase place.Behind the signal of comparison means reception detection antenna and balance reference antenna, compare,, then have radio-frequency card to enter the magnetic induction district of detecting antenna as can be known if the signal of two antennas is inequality.
As preferably, the utility model preferred embodiment as depicted in figs. 1 and 2, pulse signal generation device comprises:
Pulse signal generator is used to produce pulse signal;
Control circuit is electrically connected with described pulse signal generator, is used for behind the cyclic pulse signal that pulse signal generator produces control power amplifiers and periodically works;
Power amplification circuit is electrically connected with described control circuit, and is electrically connected with described detection antenna and described balance reference antenna respectively, in order to enough power to be provided, with the electric current that provides described detection antenna and described balance reference antenna to need.
Adopt said structure, the control circuit control in the pulse signal generation device produces periodic signal, and the signal period was made as 0.0001 second or littler, can fast reaction speed.By signal amplifier, pulse signal is amplified with the driven antenna emitting radio frequency signal.This structure makes radio-frequency card decision circuitry of the present utility model reduce the consumption of power more effectively.
Power amplification circuit comprises the band pass filter that triode Q1 and electric capacity and inductance form, and amplifies pulse signal and filters the outer frequency signal of partial resonance frequency.
As preferably, in the utility model preferred embodiment, described comparison means is made up of amplitude, phase comparator and pulse follower, the detection antenna that amplitude, phase comparator will receive and the signal of balance reference antenna compare, if the amplitude of both signals, when phase place is inequality, then export a pulse signal by the pulse follower.
In the utility model preferred embodiment, the circuit of detection antenna, balance reference antenna, comparison means as shown in Figure 3, detect antenna and be made up of capacitor C 11, inductance ANT1, the balance reference antenna is made up of capacitor C 12, inductance ANT2, detects antenna and has identical structure with the balance reference antenna.Detect two inputs that antenna and balance reference antenna are electrically connected comparison means respectively.Comparison means is a comparison amplifier U21.
Claims (7)
1, a kind of radio-frequency card decision circuitry comprises:
Pulse signal generation device is used to produce periodic pulse signal;
Detect antenna, be electrically connected, behind the pulse signal that receives pulse signal generation device, produce the magnetic induction district with described pulse signal generation device;
The balance reference antenna is electrically connected with described pulse signal generation device, behind the pulse signal that receives pulse signal generation device, produces the magnetic induction district; Described detection antenna is identical with balance reference antenna structure;
Comparison means is electrically connected with described detection antenna and described balance reference antenna respectively, is used for the signal of more described detection antenna and balance reference antenna.
2, radio-frequency card decision circuitry according to claim 1 is characterized in that, described pulse signal generation device comprises:
Pulse signal generator is used to produce pulse signal.
3, radio-frequency card decision circuitry according to claim 2 is characterized in that, described pulse signal generation device also comprises:
Control circuit is electrically connected with described pulse signal generator, is used for behind the cyclic pulse signal that pulse signal generator produces control power amplifiers and periodically works;
Power amplification circuit is electrically connected with described control circuit, and is electrically connected with described detection antenna and described balance reference antenna respectively, in order to enough power to be provided, with the electric current that provides described detection antenna and described balance reference antenna to need.
4, radio-frequency card decision circuitry according to claim 3 is characterized in that, described power amplification circuit is a triode.
5, radio-frequency card decision circuitry according to claim 4 is characterized in that, described power amplification circuit also comprises band pass filter.
6, radio-frequency card decision circuitry according to claim 1 is characterized in that, described comparison means comprises:
Amplitude, phase comparator are used for the signal of described detection antenna and balance reference antenna is compared;
The pulse follower is used for exporting a pulse signal when the signal of described detection antenna and balance reference antenna is inequality.
7, radio-frequency card decision circuitry according to claim 1 is characterized in that, described detection antenna and balance reference antenna gap are provided with, so that radio-frequency card can not enter the magnetic induction district of balance reference antenna when entering the magnetic induction district of detecting antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201154953U CN2901710Y (en) | 2006-05-18 | 2006-05-18 | Radio frequency card judging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201154953U CN2901710Y (en) | 2006-05-18 | 2006-05-18 | Radio frequency card judging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2901710Y true CN2901710Y (en) | 2007-05-16 |
Family
ID=38085874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201154953U Expired - Fee Related CN2901710Y (en) | 2006-05-18 | 2006-05-18 | Radio frequency card judging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2901710Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756243A (en) * | 2018-12-27 | 2019-05-14 | 深圳市有方科技股份有限公司 | Antenna detection device and antenna detection method |
-
2006
- 2006-05-18 CN CNU2006201154953U patent/CN2901710Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756243A (en) * | 2018-12-27 | 2019-05-14 | 深圳市有方科技股份有限公司 | Antenna detection device and antenna detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070516 Termination date: 20130518 |