CN104573583A - RFID non-contact card reader - Google Patents
RFID non-contact card reader Download PDFInfo
- Publication number
- CN104573583A CN104573583A CN201310496627.6A CN201310496627A CN104573583A CN 104573583 A CN104573583 A CN 104573583A CN 201310496627 A CN201310496627 A CN 201310496627A CN 104573583 A CN104573583 A CN 104573583A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- triode
- diode
- amplifier
- 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.)
- Pending
Links
Landscapes
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses an RFID non-contact card reader which comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first amplifier, a second amplifier, a direct current power supply, a single chip microcomputer, a first triode, a second triode, an antenna, a first diode, a second diode and a third diode. The RFID non-contact card reader comprises a carrier wave generation and power amplification circuit, a detection circuit and a filtration and amplification circuit; the antenna and the sixth capacitor form a series resonance circuit, so that the antenna can obtain the maximum current, and a larger card reading distance can be obtained; the whole RFID non-contact card reader is simpler in structure and low in production cost.
Description
Technical field
The present invention relates to a kind of card reader, particularly relate to a kind of RFID Non-contact Media Reader.
Background technology
Radio frequency identification utilizes induction, electromagnetic field or electromagnetic wave are transmission means, complete contactless two-way communication, obtain a kind of automatic identification technology of related data, need not manual intervention when this technology completes identification work, easily to be automated and not fragile, identifiable design high-speed moving object also can identify multiple radio-frequency card simultaneously, swift and convenient to operate, be widely used, some card reader of current existence, all need Card Reader chip as base station, complex structure, cost is higher, and Card Reader close together, not too adapt to the development of RFID technique.
Summary of the invention
Object of the present invention is just to provide a kind of RFID Non-contact Media Reader to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11 resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, first amplifier, second amplifier, direct supply, single-chip microcomputer, first triode, second triode, antenna, first diode, second diode and the 3rd diode, the first end of described first resistance, the first end of described 7th resistance and the equal ground connection of first end of described 3rd resistance, the second end of described first resistance simultaneously with the first end of described second resistance, the first end of described first electric capacity is connected with the in-phase input end of described first amplifier, the second end of described second resistance simultaneously with the second end of described first electric capacity, the first end of described second electric capacity is connected with the output terminal of described first amplifier, and the second end of described second electric capacity is connected with the first end of described 4th resistance, the second end of described 4th resistance simultaneously with the second end of described 3rd resistance, the first end of described 6th resistance is connected with the in-phase input end of described second amplifier, the second end of described 6th resistance simultaneously with the first end of described 5th resistance, the first end of described 7th resistance is connected with the inverting input of described second amplifier, second end of described 5th resistance is connected with the positive pole of described direct supply, the output terminal of described second amplifier is connected with the first data terminal of described single-chip microcomputer, second data terminal of described single-chip microcomputer is connected with the first end of described 11 resistance, second end of described 11 resistance is connected with the base stage of described first triode and the base stage of described second triode simultaneously, the collector of described first triode is connected with the positive pole of described direct supply, the emitter of described first triode is connected with the emitter of described second triode and the first end of described antenna simultaneously, the collector of described second triode is connected with the first end of described 6th electric capacity and ground connection, second end of described 6th electric capacity is connected with the second end of described antenna and the first end of described tenth resistance simultaneously, second end of described tenth resistance is connected with the positive pole of described first diode, the negative pole of described first diode simultaneously with the first end of described 9th resistance, the first end of described 5th electric capacity is connected with the first end of described 4th electric capacity, the second end of described 9th resistance simultaneously with the second end of described 5th electric capacity, the first end of described 8th resistance, the first end of described 3rd electric capacity, the positive pole of described second diode is connected with the negative pole of described 3rd diode and ground connection, the second end of described 4th electric capacity simultaneously with the second end of described 8th resistance, second end of described 3rd electric capacity, the negative pole of described second diode, the positive pole of described 3rd diode is connected with the inverting input of described first amplifier.
Particularly, described first triode is NPN type, and described second triode is positive-negative-positive.
Beneficial effect of the present invention is:
The present invention includes carrier wave and produces and power amplification circuit, detecting circuit and filter amplification circuit, antenna and the 6th electric capacity form series resonant circuit, make antenna to obtain maximum electric current, thus obtain larger Card Reader distance, one-piece construction is fairly simple, low production cost.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the present invention includes the first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, 5th electric capacity C5, 6th electric capacity C6, first amplifier IC1, second amplifier IC2, direct supply DC, single-chip microcomputer U, first triode Q1, second triode Q2, antenna TX, first diode D1, second diode D2 and the 3rd diode D3, the first triode Q1 is NPN type, and the second triode Q2 is positive-negative-positive, the first end of the first resistance R1, the first end of the 7th resistance R7 and the equal ground connection of first end of the 3rd resistance R3, second end of the first resistance R1 simultaneously with the first end of the second resistance R2, the first end of the first electric capacity C1 is connected with the in-phase input end of the first amplifier IC1, second end of the second resistance R2 simultaneously with second end of the first electric capacity C1, the first end of the second electric capacity C2 is connected with the output terminal of the first amplifier IC1, and second end of the second electric capacity C2 is connected with the first end of the 4th resistance R4, second end of the 4th resistance R4 simultaneously with second end of the 3rd resistance R3, the first end of the 6th resistance R6 is connected with the in-phase input end of the second amplifier IC2, second end of the 6th resistance R6 simultaneously with the first end of the 5th resistance R5, the first end of the 7th resistance R7 is connected with the inverting input of the second amplifier IC2, second end of the 5th resistance R5 is connected with the positive pole of direct supply DC, the output terminal of the second amplifier IC2 is connected with first data terminal of single-chip microcomputer U, second data terminal of single-chip microcomputer U is connected with the first end of the 11 resistance R11, second end of the 11 resistance R11 is connected with the base stage of the first triode Q1 and the base stage of the second triode Q2 simultaneously, the collector of the first triode Q1 is connected with the positive pole of direct supply DC, the emitter of the first triode Q1 is connected with the emitter of the second triode Q2 and the first end of antenna TX simultaneously, the collector of the second triode Q2 is connected with the first end of the 6th electric capacity C6 and ground connection, second end of the 6th electric capacity C6 is connected with second end of antenna TX and the first end of the tenth resistance R10 simultaneously, second end of the tenth resistance R10 is connected with the positive pole of the first diode D1, the negative pole of the first diode D1 simultaneously with the first end of the 9th resistance R9, the first end of the 5th electric capacity C5 is connected with the first end of the 4th electric capacity C4, second end of the 9th resistance R9 simultaneously with second end of the 5th electric capacity C5, the first end of the 8th resistance R8, the first end of the 3rd electric capacity C3, the positive pole of the second diode D2 is connected with the negative pole of the 3rd diode D3 and ground connection, second end of the 4th electric capacity C4 simultaneously with second end of the 8th resistance R8, second end of the 3rd electric capacity C3, the negative pole of the second diode D2, the positive pole of the 3rd diode D3 is connected with the inverting input of the first amplifier IC1.
Produced and power amplification circuit by the first triode Q1 and the second triode Q2 and peripheral cell component carrier in the present invention, by the carrier signal of the generation standard 125kHz of single-chip microcomputer U, the triode power amplification circuit that push-pull type connects is sent into after current-limiting resistance (the 11 resistance R11), carrier signal after amplification is launched by antenna TX, antenna TX and the 6th electric capacity C6 forms series resonant circuit, resonance frequency is 125kHz, the effect of resonant circuit makes antenna TX obtains maximum electric current, thus produce maximum magnetic flux, obtain larger Card Reader distance.Form detecting circuit by the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the first diode D1, the second diode D2, the 3rd diode D3 and other peripheral cell, detecting circuit, with removing 125kHz carrier signal, restores useful data signal.Filter amplification circuit is formed by the first amplifier IC1, the second amplifier IC2 and part peripheral resistance capacitance etc., wherein the first amplifier IC1 and the second amplifier IC2 all adopts model to be the integrated operational amplifier of LM358, filter shape amplification is carried out to the signal after detection, signal after amplification is sent in single-chip microcomputer U, decoded to the received signal by single-chip microcomputer U, thus obtain the card information of radio-frequency card.
Claims (2)
1. a RFID Non-contact Media Reader, is characterized in that: comprise the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11 resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, first amplifier, second amplifier, direct supply, single-chip microcomputer, first triode, second triode, antenna, first diode, second diode and the 3rd diode, the first end of described first resistance, the first end of described 7th resistance and the equal ground connection of first end of described 3rd resistance, the second end of described first resistance simultaneously with the first end of described second resistance, the first end of described first electric capacity is connected with the in-phase input end of described first amplifier, the second end of described second resistance simultaneously with the second end of described first electric capacity, the first end of described second electric capacity is connected with the output terminal of described first amplifier, and the second end of described second electric capacity is connected with the first end of described 4th resistance, the second end of described 4th resistance simultaneously with the second end of described 3rd resistance, the first end of described 6th resistance is connected with the in-phase input end of described second amplifier, the second end of described 6th resistance simultaneously with the first end of described 5th resistance, the first end of described 7th resistance is connected with the inverting input of described second amplifier, second end of described 5th resistance is connected with the positive pole of described direct supply, the output terminal of described second amplifier is connected with the first data terminal of described single-chip microcomputer, second data terminal of described single-chip microcomputer is connected with the first end of described 11 resistance, second end of described 11 resistance is connected with the base stage of described first triode and the base stage of described second triode simultaneously, the collector of described first triode is connected with the positive pole of described direct supply, the emitter of described first triode is connected with the emitter of described second triode and the first end of described antenna simultaneously, the collector of described second triode is connected with the first end of described 6th electric capacity and ground connection, second end of described 6th electric capacity is connected with the second end of described antenna and the first end of described tenth resistance simultaneously, second end of described tenth resistance is connected with the positive pole of described first diode, the negative pole of described first diode simultaneously with the first end of described 9th resistance, the first end of described 5th electric capacity is connected with the first end of described 4th electric capacity, the second end of described 9th resistance simultaneously with the second end of described 5th electric capacity, the first end of described 8th resistance, the first end of described 3rd electric capacity, the positive pole of described second diode is connected with the negative pole of described 3rd diode and ground connection, the second end of described 4th electric capacity simultaneously with the second end of described 8th resistance, second end of described 3rd electric capacity, the negative pole of described second diode, the positive pole of described 3rd diode is connected with the inverting input of described first amplifier.
2. a kind of RFID Non-contact Media Reader according to claim 1, it is characterized in that: described first triode is NPN type, described second triode is positive-negative-positive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496627.6A CN104573583A (en) | 2013-10-22 | 2013-10-22 | RFID non-contact card reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496627.6A CN104573583A (en) | 2013-10-22 | 2013-10-22 | RFID non-contact card reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104573583A true CN104573583A (en) | 2015-04-29 |
Family
ID=53089616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310496627.6A Pending CN104573583A (en) | 2013-10-22 | 2013-10-22 | RFID non-contact card reader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104573583A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179870A (en) * | 2020-01-31 | 2020-05-19 | 北京京东方显示技术有限公司 | Power supply driving circuit, driving method thereof and display device |
-
2013
- 2013-10-22 CN CN201310496627.6A patent/CN104573583A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179870A (en) * | 2020-01-31 | 2020-05-19 | 北京京东方显示技术有限公司 | Power supply driving circuit, driving method thereof and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205385307U (en) | A wireless radio frequency energy charging device for cell -phone | |
| CN202093535U (en) | Low frequency card read-write device | |
| CN104573583A (en) | RFID non-contact card reader | |
| CN102456144A (en) | Demodulator circuit of radio frequency identification (RFID) reader | |
| CN205265377U (en) | Wireless power and signal synchronization transmission system based on magnetic coupling resonance | |
| CN203502969U (en) | RFID non-contact card reader | |
| CN203299838U (en) | Card reading circuit and card reader | |
| CN102364493B (en) | Novel high-frequency communication protocol monitoring circuit | |
| CN204206115U (en) | A kind of amplifying circuit for wireless short wave transmitting antenna | |
| CN207637180U (en) | A kind of near-field communication front end hardware circuit, safety chip, dynamic token and contact type intelligent card | |
| CN208636845U (en) | Novel non-contact transponder receives circuit | |
| CN203054855U (en) | Wireless identification system based on radio-frequency technique | |
| CN104636691A (en) | Transponder for RFID (radio frequency identification) system | |
| CN203118032U (en) | Novel noncontact IC (integrated circuit) card communication circuit | |
| CN207319244U (en) | Low-power consumption radio frequency exploration card circuit | |
| CN204374985U (en) | A kind of radiofrequency signal amplifies identification circuit | |
| CN201622579U (en) | Circuit for increasing RFID literacy distance | |
| CN204667413U (en) | Multi-functional RFID low frequency closely connects non-contact reader | |
| CN204304935U (en) | A kind of high-frequency power amplifying circuit of rfid circuit | |
| CN210402360U (en) | High-efficiency radio frequency identification card reader | |
| CN203433562U (en) | RFID (radio frequency identification) electronic lock device based on NFC (near field communication) technology | |
| CN104573789A (en) | RFID (radio frequency identification) tag with photoelectric reminding function | |
| CN203414955U (en) | Radio frequency front-end circuit based on RFID | |
| CN203490728U (en) | RFID label with photoelectric prompting function | |
| CN203490712U (en) | Transmit-receive circuit used for RFID reader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |