EP2089837A1 - Dispositif électronique pour une identification de radio fréquence et procédé d'ajustement de la fréquence de résonance dudit dispositif électronique - Google Patents
Dispositif électronique pour une identification de radio fréquence et procédé d'ajustement de la fréquence de résonance dudit dispositif électroniqueInfo
- Publication number
- EP2089837A1 EP2089837A1 EP07822602A EP07822602A EP2089837A1 EP 2089837 A1 EP2089837 A1 EP 2089837A1 EP 07822602 A EP07822602 A EP 07822602A EP 07822602 A EP07822602 A EP 07822602A EP 2089837 A1 EP2089837 A1 EP 2089837A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capacitor
- resistive elements
- adjusting
- electronic device
- resonance
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 87
- 238000009966 trimming Methods 0.000 claims abstract description 39
- 241001465754 Metazoa Species 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 239000002775 capsule Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000005669 field effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000000883 ear external Anatomy 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000007920 subcutaneous administration Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
- G06K19/0726—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
- H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J2200/00—Indexing scheme relating to tuning resonant circuits and selecting resonant circuits
- H03J2200/10—Tuning of a resonator by means of digitally controlled capacitor bank
Definitions
- the invention relates to an electronic device for radio frequency identification of the type used in remote detection and identification, preferably of animals.
- the invention also relates to a method for adjusting the resonance frequency of said identification device and to an identification tag into which said identification device is incorporated.
- Radio frequency identification systems are becoming increasingly widely used for the automatic identification of people, goods, commercial products and pets or farm animals.
- These identification systems generally comprise a reader device, which may be fixed or portable and which generates an interrogation signal that receives a response from an identification element, called a tag or transponder, which returns an identification number that has previously been saved onto it.
- RFID systems may be classified into two broad types: passive systems and active systems.
- active systems the transponders require their own power supply in order to work, so they are usually equipped with batteries that can last for several years.
- passive systems the transponders do not require a power supply as they take their energy from the radio frequency magnetic field generated by the reader device, i.e. the interrogation signal sent by the reader device has the dual purpose of transmitting information and supplying energy to said identification element.
- RFID systems may also be classified according to the frequency range in which they operate, i.e. according to the communication frequencies of the transponder with the reader: LF (Low Frequency) normally below 135 KHz, HF (High Frequency) within the range of 13.56 MHz, UHF (Ultra High Frequency) within the range of 868-956 MHz or Microwave within the range of 2.45 GHz.
- LF Low Frequency
- HF High Frequency
- UHF Ultra High Frequency
- Microwave within the range of 2.45 GHz.
- RFID systems may be classified on the basis of another characteristic, the communication mode, into systems based on full duplex transmission 'FDX' or half duplex transmission 'HDX'.
- FDX systems are based on the principle that the response signal is sent as soon as the interrogation signal is received, and the reader receives the response signal repeatedly without interruption whilst the interrogation signal is maintained.
- the transponders used in HDX systems which unlike the previous ones are based on the fact that the response signal is sent only after the interrogation signal has stopped, do store energy in order to respond with their entire data content at once.
- the conventionally used systems for identifying animals are passive systems that operate at frequencies below 135kHz in which the transponders are positioned in external ear tags, internal ruminal boluses or directly injected under the skin (subcutaneous).
- HDX systems One of the most important characteristics of HDX systems is the range at which they can operate, i.e. the distance at which the reader and the identification element incorporated into the transponder or tag are able to communicate correctly.
- range e.g. the energy sent by the reader, which is limited by the regulations governing the sector, the geometrical dimensions (inner and outer diameter, thickness, number of turns%) and electric parameters (quality) of the coils of the reader and the transponder, the level of atmospheric interference, the type of modulation used for communication, the efficiency of the rectifier and the consumption of the transponder or the proximity in resonance frequency between the LC circuits called resonant tanks of the reader and the transponder.
- One possibility for connecting and disconnecting the capacitors is to use field-effect transistors in series with the trimming capacitors. These transistors may be put into a conductive or non-conductive state, e.g. by reading the values of a non-volatile memory previously programmed with the correct values.
- the problem lies in the fact that a minimum voltage is required to read said non-volatile memory, which may never be achieved if there is too large a difference between the resonance frequency of the tanks of the reader and the transponder.
- a procedure that overcomes this drawback consists of using field-effect transistors in series with the trimming capacitors, which can be put permanently into a conductive or non-conductive state by means of a control gate terminal, as disclosed in EP0407848B1.
- this solution presents two drawbacks.
- the first drawback relates to the large area of silicon that is needed, as said field-effect transistors must present a sufficiently low resistance in series in conduction so as not to affect the quality of the resonant tank.
- the second drawback is that said transistors, as well as the circuit needed to activate them and ensure a sufficient retention, are not elements that are available from all foundries, so they must be custom made.
- Another possibility although it is always used in systems other than HDX animal identification systems, is to use elements for connecting/disconnecting the capacitors whose electrical resistance varies drastically and permanently after a current higher than a certain value passes therethrough for a predetermined time.
- An objective of the present invention is therefore to disclose an alternative electronic device, tag and method that make it possible to improve the adjustment to the resonance frequency between the resonant tanks of the reader and the animal identification tag, and in particular to improve the link between the tag and the reader, increasing the reading distance between the two devices by means of elements that are commonly available from foundries.
- the electronic device for identifying animals, people or objects by radio frequency that is the object of the invention is of the type based on half duplex communication technology, 'HDX', which comprises a chip or integrated circuit equipped with at least one modulation capacitor, a rectifier, a memory unit and a logical control unit; a resonant tank, connected to said chip, which comprises at last one inductor; and at least one resonance capacitor, which is connected to the ends of the inductor; and a load capacitor for supplying power to said device.
- 'HDX' which comprises a chip or integrated circuit equipped with at least one modulation capacitor, a rectifier, a memory unit and a logical control unit; a resonant tank, connected to said chip, which comprises at last one inductor; and at least one resonance capacitor, which is connected to the ends of the inductor; and a load capacitor for supplying power to said device.
- the device is characterised in that the integrated circuit comprises a thick trimming circuit for adjusting the resonance frequency of the device, which comprises a plurality of integrated capacitors that can be connected in parallel to the resonance capacitor using corresponding resistive elements, the resistive elements being adapted to irreversibly and sufficiently alter their resistivity after a certain current value passes therethrough for a predetermined time to bring about the definitive connection/disconnection of the corresponding integrated capacitors to the resonance capacitor; and a thin trimming circuit for adjusting the resonance frequency of the device, which comprises a plurality of integrated capacitors that can be reversibly connected or disconnected in parallel to the resonance capacitor by means of corresponding transistors.
- a thick trimming circuit for adjusting the resonance frequency of the device, which comprises a plurality of integrated capacitors that can be connected in parallel to the resonance capacitor using corresponding resistive elements, the resistive elements being adapted to irreversibly and sufficiently alter their resistivity after a certain current value passes therethrough for a predetermined time to bring about the definitive connection/disconnection of the corresponding integrated capacitors to the resonance capacitor
- the thick trimming circuit makes it possible to discard defective chips before the finished product is produced, whilst the thin trimming circuit makes it possible to finish adjusting said resonance frequency after encapsulation, at the same time as the identification number of the electronic device is saved in the memory unit.
- the thick trimming circuit comprises transistors, controlled by a fuse control unit, whereby a current passes to the respective resistive elements.
- the thin trimming circuit comprises a logical adjustment unit adapted to alter the state of conduction or non- conduction of the corresponding transistors based on the reading of data stored in the memory unit of the device.
- the resistive elements are adapted to present a high resistance in their normal state and a low resistance after a high enough current pulse has passed therethrough for a certain predetermined time.
- the resistive elements are zap-type zener diodes.
- the resistive elements are adapted to present a low resistance in their normal state and a high resistance after a predetermined current pulse has passed therethrough.
- the resistive elements are polysilicon-type fuse elements.
- the value of the integrated capacitors of the thick trimming circuit is greater than the value of the integrated capacitors of the thin trimming circuit.
- the device comprises a pair of terminals that connect to the inductor and terminals that connect to the fuse control unit and the resistive elements.
- the device is encapsulated in a module and its terminals are accessible from outside.
- a tag for identifying animals, people or objects which is essentially characterised in that it houses a module according to claim 10 by over-moulding with a plastic material.
- the method is characterised in that it comprises the steps of encapsulating the device in a capsule; a thick trimming step to adjust the resonance frequency of the electronic device by applying the necessary current to bring about a change in resistivity in at least one of the resistive elements, connecting the corresponding capacitor to the resonance capacitor of the resonant tank of the device, thus adjusting the resonance frequency; over-moulding the capsule on the tag; and a thin trimming step to adjust the frequency of the electronic device by switching at least one of the transistors to a conduction state, connecting the corresponding capacitor to the resonance capacitor of the resonant tank of the electronic device.
- Fig. 1 is a diagram of a device according to the invention
- Fig. 2 is a perspective view of a tag containing the device shown in Fig. 1 housed in a module.
- the electronic device 1 for the radio frequency identification of animals shown in Fig. 1 is of the type based on half duplex communication technology, 'HDX'.
- Said device 1 comprises, in a known manner, a chip or integrated circuit 23 that performs different functions such as the generation and storage of a supply voltage, the generation of the internal clock needed for the device 1 to work, the demodulation of the data received and other functions that are normal in this type of devices; and a resonant tank 20, which is external to said integrated circuit 23 and connected thereto, which acts as an emitting and receiving aerial for the device 1.
- the chip or integrated circuit 23 of the device 1 is equipped with a modulation capacitor 9, a rectifier 1 1 , a memory unit 13 and a logical control unit 15.
- the resonant tank 20 comprises an inductor 2 and a resonance capacitor 3 that is connected to the ends of the inductor 2 and is outside the chip or integrated circuit 23, unlike other embodiments that are not shown, which contemplate the integration of said resonance capacitor 3 in the chip.
- the inductor 2 consists of a thin cable wound around 500 times in a loop with an approximate diameter of 25 millimetres.
- the device 1 comprises a load capacitor 4 for supplying power to the chip or integrated circuit 23.
- the integrated circuit 23 comprises a first thick trimming circuit 21 for adjusting the resonance frequency of the device 1 to the working frequency of the reader, and a second thin trimming circuit 22 for making finer adjustments between the resonance frequency of the device 1 and the working frequency of the reader.
- Both trimming circuits, the thick trimming circuit 21 and the thin trimming circuit 22, include a number of integrated capacitors 5.1 to 5m and 5m+1 to 5m+n, respectively, the capacitors of which may be added to that of the resonance capacitor 3 depending on the conductive state of the electronic components connected thereto.
- the integrated capacitors 5.1 , 5.2, 5m of the thick trimming circuit 21 may also be connected in parallel to the resonance capacitor 3, via corresponding resistive elements 6.1 , 6.2, 6m, or they may remain disconnected according to the operating needs, which depend to a large extent on the values of the external components and the tolerance of the capacitors included in the integrated circuit 23.
- Said resistive elements 6.1 , 6.2, 6m are adapted to irreversibly and sufficiently alter their resistivity after a certain current value has passed therethrough for a predetermined time, bringing about the definitive connection/disconnection of the corresponding integrated capacitors 5.1 , 5.2, 5m to the resonance capacitor 9.
- the resistivity of said resistive elements 6.1 , 6.2 and 6m is altered by corresponding transistors 7.1 , 7.2 and 7m that are controlled by a fuse control unit 14, causing current to circulate through said resistive elements 6.1 to 6m with a certain intensity for a predetermined time, thereby bringing about an irreversible change in their resistivity.
- transistors 7.1 , 7.2 and 7m that have been activated, different capacitors are connected in parallel to the resonance capacitor 3.
- the resistive elements 6.1 , 6.2 and 6m of the device 1 are zap-type zener diodes, which are adapted to present a high resistance in their normal state and a low resistance after a high enough current pulse has passed therethrough for a predetermined time.
- This change in resistivity in the zener diodes occurs due to the fact that after passing current pulse through the metal of the terminals of the diode, they melt, giving rise to a low resistance element.
- the resistive elements 6.1 , 6.2 and 6m of the device 1 are polysilicon-type fuses, which are adapted to present a low resistance in their normal state and a high resistance after a predetermined current pulse has passed therethrough.
- a phenomenon known as electromigration occurs in the fuse, causing a sudden increase in its resistance.
- the thin trimming circuit 22 comprises a plurality of integrated capacitors 5m+1 , 5m+2 and 5m+n, of a lower value than the capacitors 5.1 to 5m of the thick trimming circuit 21 , which can be reversibly connected or disconnected in parallel to the resonance capacitor 3 via corresponding field-effect transistors 8m+1 , 8m+2 and 8m+n.
- a logical adjustment unit 15 is responsible for altering the conductive state of said transistors 8m+1 , 8m+2 and 8m+n based on the reading of data stored in the memory unit 13 of the device 1 . These data form part of a specific block of the memory, called an adjustment block, and they require a minimum energy and voltage for their activation.
- the integrated capacitors 5.1 to 5m and 5m+1 to 5m+n cannot have a different value, being chosen so that in a single capacitor or any possible combination of the existing capacitors results in a behaviour of the device 1 that is in line with the conventional working frequencies of readers.
- the values of the capacitors 5.1 , 5.2, 5m and 5m+1 , 5m+2, 5m+n are 12pF, 24pF, 48pF and 2pF, 4pF, 8pF, respectively. Therefore, this embodiment achieves a proportional relationship between them.
- the modulation capacitor 9 is also used as a reference capacitor for adjusting the resonance frequency.
- the device 1 also has a pair of terminals 17.1 and 17.2 that make it possible to connect to the inductor 2 of resonant tank 20 from outside and terminals 16, shown in the diagram in Fig. 1 , which provide access to the fuse control unit 14 and the resistive elements 6.1 to 6m of the thick trimming circuit 21.
- the example in Fig. 2 shows the male part of an ear tag 100 for radio frequency identification of animals housing a module 101 that comprises a device 1 according to the invention by over-moulding in a plastic material.
- the device 1 is encapsulated in the module, which houses all the elements except the pair of terminals 17.1 and 17.2 that connect to the inductor 2 and the terminals 16 that connect to the fuse control unit 14 and the resistive elements 6.1 , 6.2 and 6m of the thick trimming circuit 21 of the device 1.
- This type of terminals 16 contains e.g. the clock signal, the reference or mass signal and the power data signal. However, in another embodiment that is not shown there is a terminal 16 for each resistive element 6.1 to 6m. As regards the complete adjustment of the resonance frequency of the device
- a method comprising several steps, including a thick trimming step, wherein the resistivity of one or more resistive elements 6.1 to 6m is changed to connect the corresponding capacitors 5.1 to 5m to the resonance capacitor 3 of the device 1 , and a subsequent thin trimming step, wherein one or more transistors 8m+1 to 8m+n are switched to a conduction state to connect the corresponding capacitors 5m+1 to 5m+n to the resonance capacitor 3 of the device 1.
- the first step consists of encapsulating the device 1 in a capsule or module 101 that hermetically seals the integrated circuit 23, only leaving external access to the terminals 16 and 17.1 to 17.2 that provide access to the resistive elements 6.1 to 6m and to the inductor 2, respectively.
- connection or disconnection of these capacitors 5.1 to 5m is carried out by the transistors 7.1 to 7m, which are connected by their source terminal to a external pin that is common to all of them and by their drain terminal to respective resistive elements 6.1 to 6m, which are controlled by the fuse control unit 14, which makes it possible for the necessary current to pass therethrough in order to change the resistance of the elements 6.1 to 6m.
- this adjustment step is carried out using an external source that can supply said current by electrical contact through the terminals 16.
- the product may be withdrawn before it is moulded into the tag 100, allowing devices 1 to be withdrawn from the manufacturing process in time and thus avoiding unnecessary production costs.
- the capsule is over-moulded into the end product, e.g. in the ear tag 100 shown in Fig. 2.
- a fine-tuning step is carried out, which can be performed at the same time as the identification number is recorded in the memory unit 13 of the device 1 .
- the logical adjustment unit 12 of the device 1 reads the EEPROM memory address of the memory unit 13 that is assigned for fine-tuning and controls the transistors 8m+1 to 8m+n, switching them to a state of conduction or non- conduction in accordance with the data read from the memory.
- the corresponding capacitors 5m+1 to 5m+n are added in parallel to the resonant tank 20, adjusting the resonance frequency as much as possible.
- the device 1 When the ear tag 100 enters the range of action of the reader's magnetic field, depending on the values of the elements of the resonant tank 20 and the result of the thick trimming, the device 1 might not yet be properly tuned, meaning that the power supply voltage will not be sufficient to achieve the full operating capacity of the tag 100, but it will be sufficient to read a value of the EEPROM memory of the memory unit 13, so that after tuning the charging is completed and the full operating capacity of the tag 100 is achieved.
- the calculation of the value that must be stored in an address in the general memory can be precisely evaluated by measuring the frequency that occurs when all the capacitors of the integrated circuit are connected and disconnected, as the relationship between them is known.
- the tag 100 does not run down the capacitors so that the chip or integrated circuit 23 of the device 1 still has some remaining energy so that if the chip is interrogated again by a reader, the device 1 already has enough energy to immediately carry out the fine tuning.
- Said voltage may vary between 1 or 2 Volts.
- this type of fine tuning can be carried out at any time and it is a reversible adjustment.
- this type of adjustment makes it possible to adapt the device 1 of the tag to the fixed frequency of the reader.
- Electronic devices 1 housed in capsule-type modules containing all the elements except the terminals for their respective connections, as shown in Fig. 1 achieve a greater degree of protection of the silicon material of the chip or integrated circuit 23 against the impact of the over-injection of plastic when it is encapsulated in the capsule and when, for example, an animal tries to bite another animal's ear tag inside which said module is housed.
- the fine tuning means that once the end product is finished, and after having undergone mechanical stress or sudden temperature changes due to the over-moulding and/or plastic injection operations, the resonance frequency may be adjusted to the tag 100 remotely, compensating for any possible variations that might have occurred in the values of the inductor 2 or the resonance capacitor 3.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
L'invention concerne un dispositif électronique (1) pour une identification de radio fréquence et un procédé pour ajuster la fréquence de résonance dudit dispositif électronique comportant une puce (23) équipée au moins d'au moins un condensateur de modulation (9),un redresseur (11), d'une unité de mémoire (13) et d'une unité de commande logique (15) ; un réservoir résonant (20), relié à ladite puce, qui comporte au moins un inducteur (2), - et au moins un condensateur de résonance (3), et un condensateur de charge (4) pour fournir du courant audit dispositif. Ladite puce comporte un circuit d'ajustage épais (21) pour ajuster la fréquence de résonance du dispositif, qui comporte une pluralité de condensateurs intégrés (5.1/5.m) qui peuvent être connectés en parallèle au condensateur de résonance,- et un circuit d'ajustage fin (22) pour ajuster la fréquence de résonance du dispositif, qui comporte une pluralité de condensateurs intégrés (5m+1/5m+n) qui peuvent être connectés de façon réversible ou déconnectés en parallèle au condensateur de résonance.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200603021A ES2326298B1 (es) | 2006-11-27 | 2006-11-27 | Dispositivo electronico para la identificacion por radio frecuencia y metodo para el ajuste de la frecuencia de resonancia de dicho dispositivo electronico. |
PCT/EP2007/062354 WO2008065003A1 (fr) | 2006-11-27 | 2007-11-14 | Dispositif électronique pour une identification de radio fréquence et procédé d'ajustement de la fréquence de résonance dudit dispositif électronique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2089837A1 true EP2089837A1 (fr) | 2009-08-19 |
Family
ID=38983494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07822602A Withdrawn EP2089837A1 (fr) | 2006-11-27 | 2007-11-14 | Dispositif électronique pour une identification de radio fréquence et procédé d'ajustement de la fréquence de résonance dudit dispositif électronique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2089837A1 (fr) |
ES (1) | ES2326298B1 (fr) |
WO (1) | WO2008065003A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012113043A1 (de) * | 2012-12-21 | 2014-06-26 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | System zur kontaktlosen Energie- und Datenübertragung |
CN104796017A (zh) * | 2015-04-22 | 2015-07-22 | 西安电子科技大学 | 一种频率自适应射频能量整流器 |
EP3113081B1 (fr) * | 2015-06-30 | 2019-06-12 | Siemens Aktiengesellschaft | Transpondeur radio et procédé de détermination d'un transpondeur radio |
CN115242269B (zh) * | 2022-04-02 | 2024-04-16 | 浙江绍兴苏泊尔生活电器有限公司 | 设备通信方法、装置、存储介质以及电子装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3922977A1 (de) | 1989-07-12 | 1991-01-24 | Texas Instruments Deutschland | Trimmschaltung und unter verwendung einer solchen trimmschaltung ausfuehrbares abgleichverfahren |
JPH11507192A (ja) * | 1996-04-02 | 1999-06-22 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | 接続可能な回路を有する携帯型無線機 |
US6840440B2 (en) * | 1998-11-11 | 2005-01-11 | Mitsubishi Materials Corporation | Identifying system of overlapped tag |
US6806812B1 (en) * | 2000-04-26 | 2004-10-19 | Micron Technology, Inc. | Automated antenna trim for transmitting and receiving semiconductor devices |
US6720834B2 (en) * | 2002-04-11 | 2004-04-13 | Skyworks Solutions, Inc. | Tunable resonant circuit and voltage controlled oscillator using same |
DE60319665T2 (de) * | 2003-01-09 | 2009-04-02 | Phonak Communications Ag | Verfahren und Integrierte Schaltung zur Abstimmung eines LC-Resonators und elektrisches Gerät welches einen LC-Resonator enthält |
GB0425423D0 (en) * | 2004-11-18 | 2004-12-22 | Innovision Res & Tech Plc | Rfid system |
-
2006
- 2006-11-27 ES ES200603021A patent/ES2326298B1/es not_active Expired - Fee Related
-
2007
- 2007-11-14 WO PCT/EP2007/062354 patent/WO2008065003A1/fr active Application Filing
- 2007-11-14 EP EP07822602A patent/EP2089837A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2008065003A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2326298A1 (es) | 2009-10-06 |
ES2326298B1 (es) | 2010-07-05 |
WO2008065003A1 (fr) | 2008-06-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4766437B2 (ja) | マルチモードタグとマルチモードタグの作製方法および使用方法 | |
US7374105B2 (en) | RFID tag with improved range | |
US8134467B2 (en) | Automated antenna trim for transmitting and receiving semiconductor devices | |
US7536155B2 (en) | Wireless communication device interconnectivity | |
CN102254212B (zh) | 通讯介质、通讯设备及天线调整方法 | |
US20180130272A1 (en) | Electronic credential signal activation systems and methods | |
US20050116826A1 (en) | Method for Partial Disablement of Radio Frequency Identification Tags and Tags for Use Therewith | |
US7843345B2 (en) | Dual frequency RFID circuit | |
US20090152364A1 (en) | Rfid card with piezoelectric element | |
JP5536228B2 (ja) | 自動パラメータ化rfidアンテナエクステンダ | |
EP2330538A1 (fr) | Transpondeur à fréquence radio | |
EP2537121B1 (fr) | Système de lecture multi-antenne utilisable avec des dispositifs de transaction sans contact | |
WO2008065003A1 (fr) | Dispositif électronique pour une identification de radio fréquence et procédé d'ajustement de la fréquence de résonance dudit dispositif électronique | |
EP2154634B1 (fr) | Circuit d'optimisation de mise sous tension d'un transpondeur RFID | |
US10217044B2 (en) | Transponder and method for tuning the radio transponder | |
EP1970840A1 (fr) | Etiquette RFID avec plage améliorée | |
US10719748B2 (en) | RFID screw specifically for use on eyeglass frames | |
WO2010041189A1 (fr) | Antenne pourvue d’un élément de commutation contrôlable reliant deux parties d’antenne | |
KR20120041820A (ko) | 튜닝 기능을 갖는 알에프카드모듈 | |
EP1914661A1 (fr) | Module de microlecteur capable d'établir une communication sans fil avec au moins un transpondeur | |
US20150028108A1 (en) | Double loop inductor rfid | |
EP1688871B1 (fr) | Interconnectivité sans fil du dispositif de communication | |
CN102682327A (zh) | 一种rfid芯片以及其内部谐振电容设置方法 | |
KR20090002353U (ko) | 타이어용 무선주파수식별표지 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20090609 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
17Q | First examination report despatched |
Effective date: 20100112 |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20120117 |