CN204304935U - A kind of high-frequency power amplifying circuit of rfid circuit - Google Patents
A kind of high-frequency power amplifying circuit of rfid circuit Download PDFInfo
- Publication number
- CN204304935U CN204304935U CN201420786819.0U CN201420786819U CN204304935U CN 204304935 U CN204304935 U CN 204304935U CN 201420786819 U CN201420786819 U CN 201420786819U CN 204304935 U CN204304935 U CN 204304935U
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- resistance
- coil
- diode
- frequency power
- 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
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a kind of high-frequency power amplifying circuit of rfid circuit, comprise dc source, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first coil, second coil, first resistance, second resistance, 3rd resistance, 4th resistance, triode, first diode, second diode, transformer and antenna, compared with prior art, the square-wave signal received can be carried out power amplification by the utility model, the disappearance of signal can not be caused in the process, better working stability, and circuit structure is fairly simple, there is the value of higher penetration and promotion.
Description
Technical field
The utility model relates to a kind of high-frequency power amplifying circuit, particularly relates to a kind of high-frequency power amplifying circuit of rfid circuit.
Background technology
RF identification is a kind of contactless automatic identification technology, he automatically identifies destination object by radiofrequency signal and obtains related data, identification work is without the need to manual intervention, various adverse circumstances can be worked in, radio-frequency recognition system is made up of reader and responder (label), when he works, reader sends out the radiofrequency signal of certain frequency by antenna, produce induced-current when label enters magnetic field thus obtain energy, send out the information such as self coding to be read device and to read and deliver to host computer after decoding and carry out relevant process, high frequency power amplifier is the critical component of reader, major function carries out power amplification to the inverse signal of label signal, the high-frequency power amplifying circuit job stability of rfid circuit is now poor, cost of manufacture is higher, reduce the economic worth of radio-frequency recognition system.
Utility model content
The purpose of this utility model is just the high-frequency power amplifying circuit providing a kind of rfid circuit in order to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises dc source, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first coil, second coil, first resistance, second resistance, 3rd resistance, 4th resistance, triode, first diode, second diode, transformer and antenna, the positive pole of described dc source is connected with the first end of described first electric capacity and the first end of described first coil simultaneously, second end ground connection of described first electric capacity, second end of described first coil is connected with the first end of described second electric capacity and the colelctor electrode of described triode simultaneously, the base stage of described triode is connected with the first end of described first resistance, second end of described first resistance is connected with the first end of described second coil and as the signal input part of described high-frequency power amplifying circuit, second end of described second coil is connected with the emitter stage of described triode and the positive pole of described first diode and ground connection simultaneously, the negative pole of described first diode is connected with the first end of described second resistance and the first end of described transformer simultaneously, second end of described second resistance is connected with the first end of described 3rd electric capacity, second end of described 3rd electric capacity is connected with the first end of described second electric capacity and the second end of described transformer simultaneously, the first end of described transformer secondary output first coil is connected with the first end of described 4th resistance, second end ground connection of described transformer secondary output first coil, second end of described 4th resistance is connected with the signal input part of described antenna, the first end of described transformer secondary output second coil is connected with the positive pole of described second diode, second end of described transformer secondary output second coil is connected with the first end of described 3rd resistance and the first end of described 4th electric capacity and as the first end of described high-frequency power amplifying circuit signal output part simultaneously, second end of described 3rd resistance is connected with the negative pole of described second diode and the second end of described 4th electric capacity and as the second end of described high-frequency power amplifying circuit signal output part simultaneously.
Particularly, described second electric capacity and described 3rd electric capacity are tunable capacitor.
The beneficial effects of the utility model are:
The high-frequency power amplifying circuit of a kind of rfid circuit described in the utility model, the square-wave signal received can be carried out power amplification, the disappearance of signal can not be caused in the process, better working stability, and circuit structure is fairly simple, there is the value of higher penetration and promotion.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model comprises dc source DC, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, first coil L1, second coil L2, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, triode Q, first diode D1, second diode D2, transformer T and antenna TX, the positive pole of dc source DC is connected with the first end of the first electric capacity C1 and the first end of the first coil L1 simultaneously, the second end ground connection of the first electric capacity C1, second end of the first coil L1 is connected with the first end of the second electric capacity C2 and the colelctor electrode of triode Q simultaneously, the base stage of triode Q is connected with the first end of the first resistance R1, second end of the first resistance R1 is connected with the first end of the second coil L2 and as the signal input part of high-frequency power amplifying circuit, second end of the second coil L2 is connected with the emitter stage of triode Q and the positive pole of the first diode D1 and ground connection simultaneously, the negative pole of the first diode D1 is connected with the first end of the second resistance R2 and the first end of transformer T primary coil simultaneously, second end of the second resistance R2 is connected with the first end of the 3rd electric capacity C3, second end of the 3rd electric capacity C3 is connected with the first end of the second electric capacity C2 and the second end of transformer T primary coil simultaneously, the first end of transformer T level first coil is connected with the first end of the 4th resistance R4, second end ground connection of transformer T level first coil, second end of the 4th resistance R4 is connected with the signal input part of antenna TX, the first end of transformer T level second coil is connected with the positive pole of the second diode D2, second end of transformer T level second coil is connected with the first end of the 3rd resistance R3 and the first end of the 4th electric capacity C4 and as the first end of high-frequency power amplifying circuit signal output part simultaneously, second end of the 3rd resistance R3 is connected with the negative pole of the second diode D2 and second end of the 4th electric capacity C4 and as the second end of high-frequency power amplifying circuit signal output part simultaneously, second electric capacity C2 and the 3rd electric capacity C3 is tunable capacitor.
Claims (2)
1. the high-frequency power amplifying circuit of a rfid circuit, it is characterized in that: comprise dc source, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first coil, second coil, first resistance, second resistance, 3rd resistance, 4th resistance, triode, first diode, second diode, transformer and antenna, the positive pole of described dc source is connected with the first end of described first electric capacity and the first end of described first coil simultaneously, second end ground connection of described first electric capacity, second end of described first coil is connected with the first end of described second electric capacity and the colelctor electrode of described triode simultaneously, the base stage of described triode is connected with the first end of described first resistance, second end of described first resistance is connected with the first end of described second coil and as the signal input part of described high-frequency power amplifying circuit, second end of described second coil is connected with the emitter stage of described triode and the positive pole of described first diode and ground connection simultaneously, the negative pole of described first diode is connected with the first end of described second resistance and the first end of described transformer simultaneously, second end of described second resistance is connected with the first end of described 3rd electric capacity, second end of described 3rd electric capacity is connected with the first end of described second electric capacity and the second end of described transformer simultaneously, the first end of described transformer secondary output first coil is connected with the first end of described 4th resistance, second end ground connection of described transformer secondary output first coil, second end of described 4th resistance is connected with the signal input part of described antenna, the first end of described transformer secondary output second coil is connected with the positive pole of described second diode, second end of described transformer secondary output second coil is connected with the first end of described 3rd resistance and the first end of described 4th electric capacity and as the first end of described high-frequency power amplifying circuit signal output part simultaneously, second end of described 3rd resistance is connected with the negative pole of described second diode and the second end of described 4th electric capacity and as the second end of described high-frequency power amplifying circuit signal output part simultaneously.
2. the high-frequency power amplifying circuit of a kind of rfid circuit according to claim 1, is characterized in that: described second electric capacity and described 3rd electric capacity are tunable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786819.0U CN204304935U (en) | 2014-12-12 | 2014-12-12 | A kind of high-frequency power amplifying circuit of rfid circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786819.0U CN204304935U (en) | 2014-12-12 | 2014-12-12 | A kind of high-frequency power amplifying circuit of rfid circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204304935U true CN204304935U (en) | 2015-04-29 |
Family
ID=53110439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420786819.0U Expired - Fee Related CN204304935U (en) | 2014-12-12 | 2014-12-12 | A kind of high-frequency power amplifying circuit of rfid circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204304935U (en) |
-
2014
- 2014-12-12 CN CN201420786819.0U patent/CN204304935U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202093535U (en) | Low frequency card read-write device | |
| CN204304935U (en) | A kind of high-frequency power amplifying circuit of rfid circuit | |
| CN203338386U (en) | RFID (radio frequency identification devices) screen display tag capable of being wirelessly charged | |
| CN204408421U (en) | Based on the NFC mobile phone Circuits System of Adaptive matching circuit | |
| CN204044835U (en) | A kind of high-power reader for RFID | |
| CN104504425A (en) | Radio-frequency signal read-write switching circuit and radio-frequency reader-writer | |
| CN204374972U (en) | A kind of discrete component circuit realizing low frequency RFID tag decoding | |
| CN204288254U (en) | Radiofrequency signal read-write commutation circuit and frequency read/write | |
| CN203054855U (en) | Wireless identification system based on radio-frequency technique | |
| CN202632147U (en) | Voltage stabilizer for stabilizing voltage in electronic label | |
| CN204374985U (en) | A kind of radiofrequency signal amplifies identification circuit | |
| CN202586903U (en) | Modulation circuit for controlling passive ultrahigh frequency equipment | |
| CN201035604Y (en) | Radio frequency identification card for portable equipment | |
| CN204667413U (en) | Multi-functional RFID low frequency closely connects non-contact reader | |
| CN204103869U (en) | The high-frequency amplifier that a kind of power consumption is low | |
| CN104573583A (en) | RFID non-contact card reader | |
| CN202632346U (en) | Voltage stabilizer for medium-high frequency interface in electronic tag | |
| CN203490728U (en) | RFID label with photoelectric prompting function | |
| CN204706047U (en) | A kind of RFID card reader for high fail-safe computer | |
| CN203502969U (en) | RFID non-contact card reader | |
| CN104573789A (en) | RFID (radio frequency identification) tag with photoelectric reminding function | |
| CN204906322U (en) | Power consumptive few high frequency amplifier | |
| CN204314912U (en) | A kind of passive balise based on magnetic coupling induction | |
| CN104636787A (en) | Demodulating circuit for ultrahigh-frequency RFID (radio frequency identification) tag chip | |
| US20150115041A1 (en) | self-power generation RFID tag |
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: 20150429 Termination date: 20151212 |
|
| EXPY | Termination of patent right or utility model |