CN201075228Y - Radio frequency identification tag circuit system structure - Google Patents
Radio frequency identification tag circuit system structure Download PDFInfo
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- CN201075228Y CN201075228Y CNU2007200971383U CN200720097138U CN201075228Y CN 201075228 Y CN201075228 Y CN 201075228Y CN U2007200971383 U CNU2007200971383 U CN U2007200971383U CN 200720097138 U CN200720097138 U CN 200720097138U CN 201075228 Y CN201075228 Y CN 201075228Y
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Abstract
The utility model relates to a structure of a label recognition circuit system of radio frequency, which is characterized in that the utility model consists of an antenna, a voltage rectifier circuit, a voltage stabilizing circuit, a protection circuit, a power-on reset circuit, a demodulator circuit, a modulation circuit, a clock-generating circuit, a logic control circuit and a memory; the utility model serves as a recognition card circuit of radio frequency to be used in a recognition system of radio frequency. The utility model has the advantages that: 1. a label recognition circuit structure of radio frequency is proposed, which can greatly improve energy utilization efficiency, avoid energy consumption caused by the voltage stabilizing circuit in the common structure, improve the utilization efficiency of energy input from the antenna and enlarge the read-write distance of a RFID system; 2. the circuit structure can reduce the interference of noise, thereby promoting the working reliability of the circuit.
Description
(1) technical field:
The utility model relates to the circuit relevant with RFID tag.
(2) technical background:
Radio frequency identification label system constitutes common structure as shown in Figure 4 at present.At first receive the space electromagnetic wave by antenna, with electromagnetic Conversion of energy is that ac signal is output as RF1 and RF2, by the voltage rectifier circuit ac signal of input is converted into dc signal VDD then, the power supply of circuit as a whole is for circuit provides energy.VDD is the voltage that is higher than circuit working, therefore needs voltage stable circuit input supply voltage to be stabilized to the voltage REGVDD that is fit to circuit working.Electrify restoration circuit is used for monitoring the voltage of REGVDD, when reaching the scope that is fit to circuit working, resets for integrated circuit, and system starts working.Also have demodulation to be used to receive the data of card reader simultaneously, modulation circuit is used to send data and returns to card reader.The kernel control module of circuit is a logic control circuit, is used for handling from the data of demodulator circuit and the return data after the output processing giving modulation circuit, sends to card reader.Simultaneously logic control circuit also will with the storer communication, finish the function of reading or revise memory stores data.Including circuit for producing high voltage in the storer is used for storage unit is finished erasable operation.The importation of integrated circuit is provided with holding circuit, imports voltage-limiting protection and esd protection for integrated circuit.
The input of circuit for producing high voltage generally be from REGVDD will reduce the efficient that circuit for producing high voltage utilizes energy like this, thereby reduced the distance of writing of rfid system.And the voltage rectifier circuit has only a VDD output to be used for providing power supply to each module of integrated circuit, must cause like this when each submodule work, produce very big phase mutual interference by public power supply between each submodule, reduced the reliability of integrated circuit work.
As mentioned above, utilize from the very big operating distance that influence radio frequency identification tag circuit of efficient meeting of the energy of antenna input, and because the unreasonable meeting of structure causes some reliability problems.These problems can influence the performance of radio frequency identification tag circuit.
(3) summary of the invention:
The purpose of this utility model is to provide a kind of radio frequency identification label circuit system structure, it is in order to solve the problems referred to above relevant with prior art, be a kind ofly to utilize energy efficiency higher, and can improve a kind of New-type radio-frequency label recognition circuit structure of circuit working reliability than common radio frequency identification tag circuit structure.
The technical solution of the utility model: a kind of radio frequency identification label circuit system structure, it is characterized in that it is made up of antenna, voltage rectifier circuit, voltage stable circuit, holding circuit, electrify restoration circuit, demodulator circuit, modulation circuit, clock generation circuit, logic control circuit, storer, wherein: antenna output connects the input of voltage rectifier circuit; The output of voltage rectifier circuit comprises more than one branch road, is respectively voltage stable circuit, modulation circuit, demodulator circuit, amplitude limiter circuit and memory circuitry high pressure generation module the DC voltage input is provided; Voltage stable circuit output DC source voltage provides the supply voltage that is fit to circuit working for total system; The electrify restoration circuit input connects the supply voltage of voltage stable circuit output, and the output power-on reset signal POR give logic control circuit; The demodulator circuit input connects an output branch road of voltage rectifier circuit, and the output restituted signal DATA_IN give logic control circuit; The modulation circuit input connects logic control circuit output signal DATA_OUT, and output connects output branch road of voltage rectifier circuit; Clock generation circuit clock signal CLK is the input of logic control circuit; The power supply that logic control memory circuitry input store circuit mesohigh produces circuit directly connects output branch road of voltage rectifier circuit; The memory circuitry input/output signal links to each other with logic control circuit.
Method of work of the present utility model may further comprise the steps:
(1) electromagnetic wave energy in day line absorption space is converted into the electric signal input to electromagnetic wave energy;
(2) the voltage rectifier circuit is the Conversion of energy of collecting from antenna a DC voltage, for entire RF ID chip provides direct supply;
(3) voltage stable circuit will be adjusted into the direct supply voltage that is applicable to chip operation by the DC voltage of voltage rectifier circuit output;
(4) holding circuit that plays the effect of protection for entire circuit is carried out esd protection and the unnecessary power input of releasing;
(5) when the voltage stable circuit output voltage reaches the system works allowed band, electrify restoration circuit sends electrification reset indicator signal POR to demodulator circuit, logic control circuit, clock generation circuit;
(6) modulation signal that receives from antenna of demodulator circuit demodulation is exported to logic control circuit to demodulating data and is handled;
(7) modulation circuit sends the data of rfid card response card reader, and the method for working load modulation to the carrier wave of card reader transmission, sends to card reader to data-modulated;
(8) clock generation circuit is the clock that produces the frequency that is fit to chip logic circuit work under 10% ~ 100% depth of modulation situation at input signal;
(9) logic control circuit is handled demodulating data that comes from demodulator circuit and the data of exporting the response card reader;
(10) memory stores data is selected scratch pad memory, reads and revise content in the storer by steering logic; An output branch road VDD1 of voltage rectifier circuit directly offers the power supply of storer circuit for producing high voltage, and directly from the antenna intake.
Above-mentioned radio frequency identification label circuit system structure is used for radio-frequency recognition system as the radio-frequency identification card circuit.
Superiority of the present utility model and characteristics are: 1, proposed a kind of radio frequency identification tag circuit structure, can greatly improve and utilize energy efficiency, avoided in the conventional circuit structure because the energy loss that voltage stable circuit brings, improve the efficient of utilizing from the energy of antenna input, increased the reading/writing distance of rfid system; 2, this circuit structure can reduce crosstalking of noise, thereby improves the circuit working reliability.
(4) description of drawings:
Fig. 1 is the radio frequency identification label circuit system one-piece construction synoptic diagram in the related a kind of radio frequency identification label circuit system structure of the utility model;
Fig. 2 is the voltage rectifier circuit structure diagram in the related a kind of radio frequency identification label circuit system structure of the utility model;
The clock signal waveform that Fig. 3 exports for the different modulating mode in the related a kind of radio frequency identification label circuit system structure of the utility model;
Fig. 4 is the radio frequency identification label circuit system structure figure of prior art;
Fig. 5 is the voltage rectifier structural drawing of prior art.
(5) embodiment:
Embodiment: a kind of radio frequency identification label circuit system structure (see figure 1); it is characterized in that it is made up of antenna, voltage rectifier circuit, voltage stable circuit, holding circuit, electrify restoration circuit, demodulator circuit, modulation circuit, clock generation circuit, logic control circuit, storer, wherein:
Antenna output connects the input of voltage rectifier circuit; Voltage rectifier circuit output is divided into 5 branch roads, and VDD1 ~ VDD5 as shown in Figure 1 is for voltage stable circuit, modulation circuit, demodulator circuit, amplitude limiter circuit and memory circuitry high pressure generation module provide the DC voltage input respectively.Voltage stable circuit output DC source voltage is fit to circuit work power voltage for total system provides.The electrify restoration circuit input connects the supply voltage of voltage stable circuit output, and the output power-on reset signal POR give logic control circuit.The demodulator circuit input connects an output branch road of voltage rectifier circuit, and the output restituted signal DATA_IN give logic control circuit.The modulation circuit input connects logic control circuit output signal DATA_OUT, and output connects output branch road of voltage rectifier circuit.Clock generation circuit clock signal CLK is the input of logic control circuit.The power supply that logic control memory circuitry input store circuit mesohigh produces circuit directly connects output branch road of voltage rectifier circuit.The memory circuitry input/output signal links to each other with logic control circuit.
The method of work of foregoing circuit is as follows: antenna is used to absorb the electromagnetic wave energy in space, and electromagnetic wave energy is converted into the electric signal input.The voltage rectifier circuit; being used for the Conversion of energy of collecting from antenna is DC voltage; for entire RF ID chip provides direct supply; the output of voltage rectifier circuit is divided into 5 branch roads; be respectively voltage stable circuit, modulation circuit, demodulator circuit, holding circuit and provide the DC voltage input (as shown in Figure 1; VDD2 ~ VDD5); because each module is exported respectively by the voltage rectifier circuit power supply is provided; the problem by the mutual interference of power supply phase each other of having avoided using a public power and having caused has improved the reliability of circuit working.Voltage stable circuit is used for the DC voltage by the output of voltage rectifier circuit is adjusted into the direct supply voltage that is applicable to chip operation.Holding circuit is used to carry out esd protection, and is used to the unnecessary power input of releasing, and plays the effect of protection for entire circuit.Electrify restoration circuit, when the voltage stable circuit output voltage reached the system works allowed band, to demodulator circuit, logic control circuit, clock generation circuit sent electrification reset indicator signal POR.Demodulator circuit is used for the modulation signal that demodulation receives from antenna, demodulating data is exported to logic control circuit handle.Modulation circuit is used to send the data that rfid card responds card reader, and the method for working load modulation to the carrier wave of card reader transmission, sends to card reader to data-modulated.Clock generation circuit can be the clock that can produce the frequency that is fit to chip logic circuit work under the 100% depth of modulation situation at input signal.Logic control circuit is used to handle the demodulating data that comes from demodulator circuit, and output response card reader data.Storer is scratch pad memory, is used to store data, and can read and revise content in the storer by steering logic.The power supply of storer circuit for producing high voltage is directly provided by an output branch road VDD1 of voltage rectifier circuit, just can directly utilize like this from the antenna intake, avoided in the ordinary construction because the energy loss that voltage stable circuit brings, thereby improved the efficient of utilizing from the energy of antenna input, can increase the reading/writing distance of rfid system like this.
Above-mentioned RFID chip circuit system architecture is used for radio-frequency recognition system as the radio-frequency identification card circuit.
Claims (2)
1. radio frequency identification label circuit system structure, it is characterized in that it is made up of antenna, voltage rectifier circuit, voltage stable circuit, holding circuit, electrify restoration circuit, demodulator circuit, modulation circuit, clock generation circuit, logic control circuit, storer, wherein: antenna output connects the input of voltage rectifier circuit; The output of voltage rectifier circuit is divided into and comprises more than one branch road, is respectively voltage stable circuit, modulation circuit, demodulator circuit, amplitude limiter circuit and memory circuitry high pressure generation module the DC voltage input is provided; Voltage stable circuit output DC source voltage is fit to circuit work power voltage for total system provides; The electrify restoration circuit input connects the supply voltage of voltage stable circuit output, and the output power-on reset signal POR give logic control circuit; The demodulator circuit input connects an output branch road of voltage rectifier circuit, and the output restituted signal DATA_IN give logic control circuit; The modulation circuit input connects logic control circuit output signal DATA_OUT, and output connects output branch road of voltage rectifier circuit; Clock generation circuit clock signal CLK is the input of logic control circuit; The power supply that logic control memory circuitry input store circuit mesohigh produces circuit directly connects output branch road of voltage rectifier circuit; The memory circuitry input/output signal links to each other with logic control circuit.
2. according to the said a kind of radio frequency identification label circuit system structure of claim 1, the output that it is characterized in that the voltage rectifier circuit is divided into 5 branch roads, is respectively voltage stable circuit, modulation circuit, demodulator circuit, amplitude limiter circuit and memory circuitry high pressure generation module the DC voltage input is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200971383U CN201075228Y (en) | 2007-08-20 | 2007-08-20 | Radio frequency identification tag circuit system structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200971383U CN201075228Y (en) | 2007-08-20 | 2007-08-20 | Radio frequency identification tag circuit system structure |
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| Publication Number | Publication Date |
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| CN201075228Y true CN201075228Y (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200971383U Expired - Fee Related CN201075228Y (en) | 2007-08-20 | 2007-08-20 | Radio frequency identification tag circuit system structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011058455A1 (en) | 2009-11-14 | 2011-05-19 | Logomotion, S.R.O. | The method and solution of data transmission from the transponder to the reader, especially in payment solutions with a mobile communication device |
| CN102110760A (en) * | 2009-12-23 | 2011-06-29 | 海力士半导体有限公司 | Led package and rfid system including the same |
| CN101727601B (en) * | 2008-11-03 | 2011-10-26 | 上海复旦微电子股份有限公司 | Radio frequency identification tag and method for calibrating clock signals |
| CN102708398A (en) * | 2012-06-21 | 2012-10-03 | 中国科学院上海微***与信息技术研究所 | RFID tag with phase change memory |
-
2007
- 2007-08-20 CN CNU2007200971383U patent/CN201075228Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727601B (en) * | 2008-11-03 | 2011-10-26 | 上海复旦微电子股份有限公司 | Radio frequency identification tag and method for calibrating clock signals |
| WO2011058455A1 (en) | 2009-11-14 | 2011-05-19 | Logomotion, S.R.O. | The method and solution of data transmission from the transponder to the reader, especially in payment solutions with a mobile communication device |
| US9742468B2 (en) | 2009-11-14 | 2017-08-22 | Smk Corporation | Method and solution of data transmission from the transponder to the reader, especially in payment solutions with a mobile communication device |
| CN102110760A (en) * | 2009-12-23 | 2011-06-29 | 海力士半导体有限公司 | Led package and rfid system including the same |
| CN102110760B (en) * | 2009-12-23 | 2015-07-22 | 海力士半导体有限公司 | LED package and RFID system including the same |
| CN102708398A (en) * | 2012-06-21 | 2012-10-03 | 中国科学院上海微***与信息技术研究所 | RFID tag with phase change memory |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Lu Feng Document name: Notification of Passing Examination on Formalities |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20140820 |
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| EXPY | Termination of patent right or utility model |