CN104125592A - Method for controlling an antenna network quality factor of a near field communication device, and associated apparatus - Google Patents
Method for controlling an antenna network quality factor of a near field communication device, and associated apparatus Download PDFInfo
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- CN104125592A CN104125592A CN201410174245.6A CN201410174245A CN104125592A CN 104125592 A CN104125592 A CN 104125592A CN 201410174245 A CN201410174245 A CN 201410174245A CN 104125592 A CN104125592 A CN 104125592A
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Abstract
The invention provides a method for controlling an antenna network quality factor of a near field communication device, and an associated apparatus. The method for controlling the antenna network quality factor of the NFC device includes: determining whether a first data rate or a second data rate should be used for data communication during different time intervals, respectively; and when it is determined that the first data rate should be used during a first time interval of the time intervals, controlling a set of internal resistors positioned within a chip of the NFC device to have a first configuration during the first time interval, in order to adjust the antenna network quality factor. More particularly, the method further includes: when it is determined that the second data rate should be used during a second time interval of the time intervals, controlling the set of internal resistors to have a second configuration during the second time interval, in order to adjust the antenna network quality factor. An associated apparatus is also provided.
Description
Technical field
The present invention is tuning about the dynamic mass factor not changing in electronic installation in antenna matching network situation, especially about controlling method and the relevant device of an aerial network quality factor of a nfc apparatus.
Background technology
According to correlation technique, design a traditional short-range communication (near field communication, NFC) device is used predetermined data rate (data rate) communication, wherein, in the design phase of traditional nfc apparatus, conventionally need to confirm the right value (proper value) of this aerial network quality factor (quality factor) (or so-called Q).For high data rate communication, need tuning this aerial network quality factor to make its diminish (such as, a low Q), and for low data rate communications, first-selected tuning this aerial network quality factor makes it become large (such as, a high Q).In the situation that traditional nfc apparatus can be used different data rate communications, need quality factor tuning (or Q-is tuning).Yet, can run into some problems.For example, for a fixing Q value is set so that traditional nfc apparatus is applicable to using respectively different data rate communications, the antenna matching network of traditional nfc apparatus is equipped with extra element conventionally on a printed circuit board (PCB) (printed circuit board, PCB) of this traditional nfc apparatus.Since the total amount of element on the corresponding printed circuit board (PCB) of the size of the nfc apparatus that this is traditional, as a result of, be conventionally introduced in the size of traditional nfc apparatus and use respectively the balance (tradeoff) between the ability of different data rate communications.In another example, although the designing antenna matching network that developer can be careful in the design phase of traditional nfc apparatus, but due to the inherent characteristic of add ons, so introduced the balance between the performance of high data rate communication and the performance of low data rate communications.Especially, for traditional nfc apparatus with the operational capacity in battery supply (battery power) shortage situation is provided, need this aerial network quality factor to tune up (one high Q), wherein, this operation in battery supply shortage situation is by from external magnetic field, (incoming field) obtains energy.Although designer is at careful design matching network of the design phase of traditional nfc apparatus, but because the inherent characteristic of add ons, so introduced in the performance of high data rate communication (can carry out this high data rate communication in the situation that battery supply can be used) and from external magnetic field, obtained the balance between the efficiency of energy.So, need a new method, to improve the data of all data rates of nfc apparatus simultaneously, send performance.
Summary of the invention
One object of the embodiment of the present invention is to provide a kind of for controlling the method for the aerial network quality factor of a nfc apparatus, and a relevant equipment.
According at least one preferred embodiment, the method for an aerial network quality factor of control one nfc apparatus is provided, the method comprises: determine the data rate for data communication using in the different time intervals; And when determining the very first time interval in this different time interval, while using this first data rate to carry out data communication, control one group of internal resistance and in this very first time interval, there is one first configuration, to adjust this aerial network quality factor, wherein, this internal resistance is positioned on a chip of this nfc apparatus.
According at least one preferred embodiment, one equipment (apparatus) of one aerial network quality factor of one control one nfc apparatus is provided, wherein, this equipment comprises: this equipment comprises at least a portion of this nfc apparatus, this equipment comprises: one group of internal resistance, be positioned at a chip of this nfc apparatus, for carrying out aerial network quality factor, control; And a control circuit, be positioned at this chip of this nfc apparatus and couple with this group internal resistance, for determining the data rate for data communication using in the different time intervals; When a very first time interval of determining within this different time interval, while using one first data rate to carry out data communication, this control circuit is controlled this group internal resistance and in this very first time interval, is had one first configuration, to adjust this aerial network quality factor.
An effect of the present invention is, the method for an aerial network quality factor of control one nfc apparatus of the present invention and equipment can be in the situation that do not change dynamic tuning this aerial network quality factor of this antenna matching network of this nfc apparatus.
Accompanying drawing explanation
Fig. 1 is the equipment schematic diagram of an aerial network quality factor of control one nfc apparatus based on the present invention one first embodiment;
Fig. 2 is the equipment schematic diagram of an aerial network quality factor of control one nfc apparatus based on the present invention one second embodiment;
Fig. 3 is the equipment schematic diagram of an aerial network quality factor of control one nfc apparatus based on the present invention 1 the 3rd embodiment;
Fig. 4 is the equipment schematic diagram of an aerial network quality factor of control one nfc apparatus based on the present invention 1 the 4th embodiment;
Fig. 5 is the schematic diagram of some implementation details of equipment in Fig. 1 of providing of one embodiment of the invention;
Fig. 6 is the schematic diagram of some implementation details of equipment in Fig. 2 of providing of one embodiment of the invention;
Fig. 7 is the schematic diagram of some implementation details of equipment in Fig. 3 of providing of one embodiment of the invention;
Fig. 8 is the schematic diagram of some implementation details of equipment in Fig. 4 of providing of one embodiment of the invention;
Fig. 9 is that one embodiment of the invention provides, a near field communication system that comprises the nfc apparatus of the arbitrary embodiment shown in Fig. 1-4;
Figure 10 is the method flow diagram of controlling an aerial network quality factor of nfc apparatus that one embodiment of the invention provides;
Figure 11 is the schematic diagram of the short-range communication reflector Tx signal that the method for showing to Figure 10 that provides of one embodiment of the invention is relevant;
Figure 12 is the detailed maps of the portion waveshape of the short-range communication reflector Tx signal that shows in Figure 11.
Embodiment
The particular term that embodiment is used refers to specific element.One skilled in the art will appreciate that manufacturer can use different names to an element.The application does not adopt different names to distinguish element with element, but distinguishes element with the difference of interelement function.In following embodiment and claim, term " comprises " and " comprising " is an open restriction, should be understood as that " including but not limited to ".Term " couples " and should be understood to directly or indirectly be electrically connected to.Accordingly, if a device is electrically connected to another device, this connection can be a directly electrical connection, can be also by adopting one of other devices or connection to be indirectly electrically connected to.
Refer to Fig. 1, Fig. 1 illustrate that the present invention one first embodiment provides for controlling the equipment 100-1 of the aerial network quality factor of nfc apparatus.Wherein, equipment 100-1 can comprise at least a portion (such as part or all) of nfc apparatus (NFC device).For example, this equipment 100-1 can comprise a part for aforementioned nfc apparatus, and special, this equipment 100-1 may be at least one hardware circuit, such as at least one integrated circuit (IC) in electronic equipment.In another embodiment, this equipment 100-1 may be the integral body of aforementioned nfc apparatus.In yet another embodiment, this device 100-1 can comprise a near field communication system, and this near field communication system comprises aforementioned this nfc apparatus.
As shown in Figure 1, this device 100-1 can comprise a chip 110-1, and may further include an antenna matching network and electromagnetic interference (electromagnetic interference, EMI) filtration module 130 and a short-range communication antenna 140, wherein, this chip 110-1 is as the example of aforementioned at least one IC, this antenna matching network and emi-filter module 130 can comprise an antenna matching network and an Electromagnetic interference filter (for simplicity, not shown).Actually, aforementioned this Electromagnetic interference filter can be realized by some impedance components (impedance component) (in this embodiment, such as one or more inductance, and/or, one or more electric capacity).And aforementioned antenna matching network can be realized by some impedance components (in this embodiment, such as one or more inductance, and/or, one or more electric capacity).In addition, chip 110-1 can comprise a control circuit, such as a digital baseband circuit (digital baseband circuit) 112, and may further include a programmable resistor array (programmable resistor array) 116, the resistance of this programmable resistor array 116 can be by being used a plurality of physical resistance or using a plurality of transistors (transistor) to realize, wherein, configure a plurality of transistors operates as resistance.For example, these transistors can be mos field effect transistor (Metal Oxide Semiconductor Field Effect Transistors, MOSFET).In addition, this chip 110-1 may further include a transceiver and rectifier module 118.For example, this transceiver and rectifier module 118 can comprise a reflector 118T, a receiver 118R and a rectifier 118C.As shown in Figure 1, port TXP and the TXN of one group of reflector of this reflector 118T and this chip 110-1 couple, wherein, reflector 118T is for organizing transmitter port TXP and TXN, antenna matching network and emi-filter module 130 by this, and short-range communication antenna 140, for nfc apparatus transmits data.One group of receiver port RXP and the RXN of this receiver 118R and chip 110-1 couple, wherein, receiver 118R is by this group receiver port RXP and RXN, this antenna matching network and emi-filter module 130, and short-range communication antenna 140, for this nfc apparatus receives data.One group of card (card) port CardP and the CardN of this rectifier 118C and this chip 110-1 couple, and wherein, rectifier 118C is by this group card port CardP and CardN, for nfc apparatus is carried out rectification operation.The programmable resistor array 116 that it should be noted that this embodiment is arranged in outside transceiver and rectifier module 118, and this programmable resistor array 116 can organize port with another and couple, such as one group of separate port of this chip 110-1 (
st
and-
al
on
et
ermin
al) STP and STN, rather than organize transmitter port TXP and TXN with this, this group receiver port RXP and RXN, arbitrary group of port in this group card port CardP and CardN couples.Description is herein only used to explain the present invention, does not mean that it is limitation of the present invention.According to some distortion of this embodiment, such as the embodiment that Fig. 2-4 illustrate respectively, the part-structure shown in Fig. 1 can be changed.
Fig. 2 illustrate that the present invention one second embodiment provides for controlling the equipment 100-2 of the aerial network quality factor of nfc apparatus, wherein, this embodiment is a distortion embodiment illustrated in fig. 1.Compare with the equipment 100-1 shown in Fig. 1, the programmable resistor array 116 in this embodiment is integrated in aforementioned rectifier.In response to structural change, comprise that in this embodiment this rectifier of this programmable resistor array 116 is called as rectifier 118C ', and the chip in this embodiment is called as chip 110-2.In addition, programmable resistor array 116 can be organized card port CardP with this and CardN couples.For simplicity, no longer repeat herein this embodiment and similar description embodiment illustrated in fig. 1.
Fig. 3 illustrate that the present invention 1 the 3rd embodiment provides for controlling the equipment 100-3 of the aerial network quality factor of nfc apparatus, wherein, this embodiment is a distortion embodiment illustrated in fig. 1.Compare with the equipment 100-1 shown in Fig. 1, the programmable resistor array 116 in this embodiment is integrated in aforementioned reflector.In response to structural change, comprise that in this embodiment the reflector of this programmable resistor array 116 is called as reflector 118T ', and the chip in this embodiment is called as chip 110-3.In addition, programmable resistor array 116 can be organized transmitter port TXP with this and TXN couples.For simplicity, no longer repeat herein this embodiment and similar description embodiment illustrated in fig. 1.
Fig. 4 illustrate that the present invention 1 the 4th embodiment provides for controlling the equipment 100-4 of the aerial network quality factor of nfc apparatus, wherein, this embodiment is a distortion embodiment illustrated in fig. 1.Compare with the equipment 100-1 shown in Fig. 1, the programmable resistor array 116 in this embodiment is integrated in aforementioned receiver.In response to structural change, comprise that in this embodiment this receiver of this programmable resistor array 116 is called as receiver 118R ', and the chip in this embodiment is called as chip 110-4.In addition, programmable resistor array 116 can be organized receiver port RXP with this and RXN couples.For simplicity, no longer repeat herein this embodiment and similar description embodiment illustrated in fig. 1.
The details that realizes of equipment 100-1 in Fig. 1 is shown according to one embodiment of the invention Fig. 5.As shown in Figure 5, this programmable resistor array 116 of this embodiment comprises one group of internal resistance (internal resistors) of a plurality of switch units (switching unit) and chip 110-1, and wherein a plurality of switch units are as switch unit { S
n} and { S (j)
p(k) }, wherein, sign j and k are respectively the positive integers dropping in interval range [1, J] and interval range [1, K] scope, and this group internal resistance is as internal resistance { R
n} and { R (j)
p(k) }, wherein, sign j and k are respectively the aforementioned positive integers dropping in interval range [1, J] and interval range [1, K] scope, and wherein, a plurality of switch units are (such as switch unit { S
n} and { S (j)
p(k) }) and this group internal resistance (such as internal resistance { R
n} and { R (j)
p(k) }) be the inner member of programmable resistor array 116, this programmable resistor array 116 is arranged in the chip 110-1 of nfc apparatus.For example, label J can represent to be greater than a positive integer of 1, and label K can represent to be greater than a positive integer of 1.In this embodiment, this digital baseband circuit 112, this switch unit { S
n} and { S (j)
p}, and internal resistance { R (k)
n} and { R (j)
p(k) } be arranged in the chip 110-1 of aforementioned nfc apparatus, wherein, by upper this of chip 110-1, organize self-existent port STN and STP, by switch unit { S
n} and { S (j)
p} and internal resistance { R (k)
n} and { R (j)
p(k) } be couple to antenna matching network and emi-filter module 130.
According to this embodiment, internal resistance { R
n} and { R (j)
p(k) } for carrying out aerial network quality factor, control.In addition, digital baseband circuit 112 can determine whether need to by aerial network quality factor be tuned to less (such as, one low Q, for high data rate communication), or determine whether need to by aerial network quality factor be tuned to large (such as a high Q, for low data rate communications, or, for the electromagnetic field (electromagnetic field) producing from other devices, obtain energy).According to whether need by aerial network quality factor be tuned to less, or whether need by aerial network quality factor be tuned to larger, digital baseband circuit 112 can be controlled this group internal resistance respectively different configurations different in the situation that, such as internal resistance { R
n} and { R (j)
p(k) }, so that the adaptability implementation quality factor tuning (or Q-is tuning) in the situation that not changing antenna matching network and emi-filter module 130, especially, in the situation that not changing antenna matching network and emi-filter module 130, obtain higher data rate.For example, when determine need to by aerial network quality factor be tuned to large (such as, a high Q, for low data rate communications, or for from electromagnetic field results energy), digital baseband circuit 112 can be controlled this group internal resistance (such as resistance { R
n} and { R (j)
p(k) }) in a very first time interval, there is one first configuration, to in the situation that not changing this antenna matching network and emi-filter module 130, adjust this aerial network quality factor and be suitable for low data rate communications or be suitable for gathering in the crops energy.In other embodiments, when determine need to by aerial network quality factor be tuned to less (such as, one low Q, for high data rate communication) time, this digital baseband circuit 112 can be controlled this group internal resistance and within one second time interval, have one second configuration, to adjust this aerial network quality factor in the situation that not changing antenna matching network and emi-filter module 130, is suitable for high data rate communication.Common, this second configuration is different from this first configuration.
In practice, for example, under the control of aforementioned control circuit (digital baseband circuit 112), rely on the ideal value (desired value) of this aerial network quality factor, by the relevant port set of chip 110-1, this group card port CardN and CardP such as in this embodiment, can organize this resistance number correct in internal resistance and be couple to this short-range communication antenna 140.By the more internal resistance of parallel coupled, can obtain the higher ideal value of aerial network quality factor, vice versa.By this way, when this nfc apparatus receives data with 106kbps, configure this nfc apparatus to obtain the highest power output and best performance, when this nfc apparatus sends data with 848kbps, configure this distance communication device and meet demand fall time.For relevant information, refer to ISO/IEC14443-2:2010 and M.Gebhart, et al., " Automatic Analysis of13.56MHz Reader Command modulation pulses ", Eurasip RFID Workshop2008.
According to one embodiment of the invention, Fig. 6 show equipment 100-2 in Fig. 2 some realize details, this embodiment is distortion embodiment illustrated in fig. 5.According to this embodiment, a plurality of switch units are (such as switch unit { S
n} and { S (j)
p(k) }) and this group internal resistance (such as internal resistance { R
n} and { R (j)
p(k) }) can be disposed in aforementioned rectifier 118C '.In addition, by this group card port CardN and CardP of chip 110-2, by switch unit { S
n} and { S (j)
p} and internal resistance { R (k)
n} and { R (j)
p(k) } be couple to antenna matching network and emi-filter module 130.In practice, except the element in antenna matching network and emi-filter module 130, the element (i.e. the element of the chip 110-2 outside in nfc apparatus) of chip 110-2 outside (external) may further include some other impedance component (impedance component), such as the capacitor C in Fig. 6
nand C
p, itself and antenna matching network and emi-filter module 130 couple, and respectively by this group card port CardN and CardP and switch unit { S on chip 110-2
n} and { S (j)
p(k) } couple.For simplicity, this embodiment description similar to the aforementioned embodiment no longer repeats in detail.
According to one embodiment of the invention, Fig. 7 shows some implementation details of equipment 100-3 in Fig. 3, and this embodiment is distortion embodiment illustrated in fig. 5.According to this embodiment, a plurality of switch units are (such as switch unit { S
n} and { S (j)
p(k) }) and this group internal resistance (such as internal resistance { R
n} and { R (j)
p(k) }) can be disposed in aforementioned reflector 118T '.In addition, by this group transmitter port TXN and TXP of chip 110-3, by switch unit { S
n} and { S (j)
p} and internal resistance { R (k)
n} and { R (j)
p(k) } be couple to antenna matching network and emi-filter module 130.For simplicity, this embodiment description similar to the aforementioned embodiment no longer repeats in detail.
According to one embodiment of the invention, Fig. 8 shows some implementation details of equipment 100-4 in Fig. 4, and this embodiment is distortion embodiment illustrated in fig. 5.According to this embodiment, a plurality of switch units are (such as switch unit { S
n} and { S (j)
p(k) }) and this group internal resistance (such as internal resistance { R
n} and { R (j)
p(k) }) can be disposed in aforementioned receiver 118R '.In addition, by this group receiver port RXN and RXP of chip 110-4, by switch unit { S
n} and { S (j)
p} and internal resistance { R (k)
n} and { R (j)
p(k) } be couple to antenna matching network and emi-filter module 130.For simplicity, this embodiment description similar to the aforementioned embodiment no longer repeats in detail.
According to one embodiment of the invention, Fig. 9 illustrates a near field communication system 200, this near field communication system 200 comprises the nfc apparatus in arbitrary embodiment that aforementioned Fig. 1-4 illustrate respectively, wherein, polling set-up (polling device) 210 and monitoring device (listening device) 220 can represent two near field communication (NFC) terminals in this near field communication system 200.As shown in Figure 9, this polling set-up 210 and this monitoring device 220 can have respectively themselves electronic circuit, and the short-range communication antenna can with themselves.
For better understanding, this monitoring device 220 can be used as an example of aforementioned nfc apparatus, and this polling set-up 210 can be used as an example of other devices in the embodiment shown in Fig. 5.According to this embodiment, this near field communication system 200 can aforementioned two near field communication (NFC) terminals (such as, this polling set-up 210 and this monitoring device 220) between with different data rate, send data.For example, polling set-up 210 may be that reader (reader) and the monitoring device 220 of a short-range communication may be passive label (tag) or cards (card).When monitoring device needs to operate in the lower time of situation that battery supply lacks, design this monitoring device 220 and can from external magnetic field, (incoming field) obtain energy, external magnetic field is as the magnetic field being identified in Fig. 9 (FIELD), can be specifically the electromagnetic field in aforementioned embodiment illustrated in fig. 5 (electromagnetic field).For monitoring device 220, a higher data rate between polling set-up 210 and monitoring device 220 (such as, the data rate higher than any other available data rate) need aerial network quality factor lower, yet it is higher from magnetic field, to obtain energy demand aerial network quality factor.
It should be noted that main purpose that aforementioned Q is tuning is in the situation that not changing antenna matching network and emi-filter module 130, obtains a higher data rate (for example aforementioned data rate).For low data rate communications or for suitable power results, need the tuned antenna network quality factor to make it become large (such as, a high Q).Yet, for high data rate communication, need the tuned antenna network quality factor to make its diminish (such as, a low Q).In practice, the communication data rate of this short-range communication acquiescence is 106kbps normally, 106kbps represents 106kilobits per second (kilobit), the data rate that this data rate is normally minimum, and it is higher that the default value of this aerial network quality factor is set when therefore initial.Based on short-range communication agreement, with the first packet of this 106kpbs, indicate the needed data rate of subsequent communications.According to this embodiment, the equipment 100-1 showing in Fig. 1, the equipment 100-2 showing in Fig. 2, the equipment 100-3 showing in Fig. 3, any one in the equipment 100-4 showing in Fig. 4 can be used this information, rely on that aforementioned Q-is tuning carrys out the suitable aerial network quality factor that arranges, wherein, power comes from battery or aforementioned electromagnetic field, and all to carry out aforementioned Q-tuning.
Use the structure of showing in Fig. 1, the structure of showing in Fig. 2, arbitrary structure in the structure of showing in the structure of showing in Fig. 3 and Fig. 4 is (concrete, the structure of showing in Fig. 5, the structure of showing in Fig. 6, arbitrary structure in the structure of showing in the structure of showing in Fig. 7 and Fig. 8), in the situation that adjust dynamically aerial network quality factor according to the present mode of data rate and monitoring device 220, can solve the problem of association area.It should be understood that all embodiment of the present invention be only exemplary be not limitation of the present invention.The present invention may operate in single-ended or difference modes.
According to one embodiment of the invention, Figure 10 illustrates the flow chart of the method 300 of the aerial network quality factor of controlling a nfc apparatus.The method 300 of showing in Figure 10 can be applied to equipment 100-3 in equipment 100-2, the Fig. 3 in equipment 100-1, the Fig. 2 in Fig. 1 and the arbitrary equipment in the equipment 100-4 in Fig. 4, more specifically, the method 300 can be applied in the chip 110-1 showing in Fig. 1, the chip 110-2 showing in Fig. 2, any one chip in the chip 110-4 showing in the chip 110-3 showing in Fig. 3 and Fig. 4.The method is described below: whether
In step 310, data baseband circuit 112 determine the different time intervals (such as, for performing step the time interval of 330-1 operation, or for performing step the time interval of 330-2 operation) specific (specific) time interval uses the first data rate or the second data rate carries out data communication.When determining while using this first data rate to carry out data communication in this specific time interval, execution step 320-1, otherwise, execution step 320-2.
At step 320-1, in order to adjust aerial network quality factor, digital baseband circuit 112 is controlled this group internal resistance (such as internal resistance { R
n} and { R (j)
p(k) }) there is one first configuration, such as aforementioned configuration in specified time interval.More specifically, this digital baseband circuit 112 is controlled internal resistance { R
n} and { R (j)
p(k) } in this specified time interval (such as aforementioned very first time interval), there is this first configuration, cause that this aerial network quality factor of this nfc apparatus equals one first numerical value.
At step 320-2, in order to adjust this aerial network quality factor, this digital baseband circuit 112 is controlled this group internal resistance (such as internal resistance { R
n} and { R (j)
p(k) }) there is one second configuration, such as aforementioned configuration in specified time interval.More specifically, this digital baseband circuit 112 is controlled internal resistance { R
n} and { R (j)
p(k) } in this specified time interval (such as above-mentioned second time interval), there is this second configuration, cause that this aerial network quality factor of this nfc apparatus equals a second value.Generally, this second value is different from this first numerical value.
At step 330-1, under the control of this digital baseband circuit 112, this nfc apparatus is carried out one first operation, such as adopting this first data rate to carry out data transmission.
At step 330-2, under the control of this digital baseband circuit 112, this nfc apparatus is carried out one second operation, such as adopting this second data rate to carry out data transmission.
According to this embodiment, digital baseband circuit 112 can arrange respectively two kinds of configurations corresponding to low data rate communications and high data rate communication.The object that this is only used to explanation, can not be interpreted as it is limitation of the present invention.According to some distortion of this embodiment, the number of configuration can be more than two.In practice, definite operation that digital baseband circuit 112 is carried out in step 310 can for example, be carried out under the help of a memory cell (, a nonvolatile memory, such as a flash memories).This digital baseband circuit 112 can be stored a sign (flag) in this memory cell, and wherein, the default value of this sign can be indicated and be used this first configuration.In needs, this digital baseband circuit 112 can change this and be identified to another numerical value, this another another configuration of numerical value indication employing (such as, the second configuration).For example, this digital baseband circuit 112 can arrange this be designated corresponding to three or a plurality of different configuration (such as, this first configuration, this second configuration, one the 3rd configuration etc.) numerical value in a plurality of candidate values, these three or a plurality of different different pieces of information speed that is respectively used to data transmission that configures.More specifically, except this first configuration and this second configuration, this digital baseband circuit 112 can arrange at least one other configuration, to adjust this aerial network quality factor, cause this aerial network quality factor of this nfc apparatus and another numerical value (such as, a numerical value different with arbitrary value of this second value from this first numerical value) equate, wherein, from step 310, start respectively can be expanded as three or more some work flow processs towards this part workflow of step 320-1 and step 320-2, the workflow of these three or more parts corresponds respectively to the different pieces of information speed that aforementioned data transmit.As a result of, this digital baseband circuit 112 can arrange the difference configuration that corresponds respectively to three or more different data rates in data transmission.
According to some distortion of this embodiment, from electromagnetic field, obtain the operation of energy and can replace this first or second operation.For example, obtain the operation of energy can replace this first operation from electromagnetic field, wherein, whether step 310 can be detected use the operation of the first configuration to replace.
According to some embodiments of the present invention, such as, embodiment illustrated in fig. 10 and distortion, internal resistance { R
n} and { R (j)
p(k) } be arranged on a plurality of switchable conducting paths (conduction path), the plurality of switchable conducting path be positioned at consider chips (such as, chip 110-1,110-2,110-3, in and110-4 one) at least one grounding ports to consider in the port of relevant group of this chip, wherein, these switchable conducting paths are respectively by internal circuit { R
n} and { R (j)
p(k) }.In the situation that the method 300 shown in Figure 10 is applied to the chip 110-1 shown in Fig. 1, internal resistance { R
n} and { R (j)
p(k) } be arranged on switchable conducting path, this switchable conducting path lay respectively at aforementioned at least one earth terminal (such as, one or more earth terminal of chip 110-1, such as, the earth terminal shown in chip 110-1 shown in Figure 5) and the port STN and STP of this group independent (stand-alone) of this chip 110-1 between.In the situation that the method 300 shown in Figure 10 is applied to the chip 110-2 shown in Fig. 2, internal resistance { R
n} and { R (j)
p(k) } be arranged on switchable conducting path, this switchable conducting path lay respectively at aforementioned at least one earth terminal (such as, one or more earth terminal of chip 110-2, such as, the earth terminal shown in chip 110-2 shown in Figure 6) and this group card port CardN and CardP of this chip 110-2 between.In the situation that the method 300 shown in Figure 10 is applied to the chip 110-3 shown in Fig. 3, internal resistance { R
n} and { R (j)
p(k) } be arranged on switchable conducting path, this switchable conducting path lay respectively at aforementioned at least one earth terminal (such as, one or more earth terminal of chip 110-3, such as, the earth terminal shown in chip 110-3 shown in Figure 7) and this group transmitter port TXN and TXP of this chip 110-3 between.In the situation that the method 300 shown in Figure 10 is applied to the chip 110-4 shown in Fig. 4, internal resistance { R
n} and { R (j)
p(k) } be arranged on switchable conducting path, this switchable conducting path lay respectively at aforementioned at least one earth terminal (such as, one or more earth terminal of chip 110-4, such as, the earth terminal shown in chip 110-4 shown in Figure 8) and this group receiver port RXN and RXP of this chip 110-4 between.
For example, at step 320-1, switch unit { S
n} and { S (j)
p(k) } for optionally enabling respectively this switchable conducting path, (this switchable conducting path is by internal resistance { R
n} and { R (j)
p(k) }), so that this first configuration to be set.More specifically, under the control of this digital baseband circuit 112, optionally open one or more switch unit { S
n} and { S (j)
p(k) } this first configuration is set.In another embodiment, at step 320-2, this switch unit { S
n} and { S (j)
p(k) } for optionally enabling respectively this switchable conducting path, (this switchable conducting path is by internal resistance { R
n} and { R (j)
p(k) }), so that this second configuration to be set.More specifically, under the control of this digital baseband circuit 112, optionally open one or more switch unit { S
n} and { S (j)
p(k) } this second configuration is set.
According to one embodiment of the invention, Figure 11 illustrates a short-range communication reflector (transmitter relevant to the method 300 of showing in Figure 10, Tx) signal, and Figure 12 illustrates the details of the portion waveshape 510 in the waveform of the short-range communication launcher signal in Figure 11.The curve table of function (function) v (t) is shown in modulation signal (modulated signal) waveform on short-range communication antenna 140, and wherein, label t represents the time.Dotted line in Figure 12 represents the envelope (envelope) with this modulation signal waveform of exponential manner decline.For example,, for amplitude keying (amplitude-shift keying, an ASK) time out (pause time) T of 106kbps
pausecan equal 3 delicate (microseconds, μ s), this means that data rate equals 106kbps and amplitude keying is used.More specifically, label Q represent aforementioned aerial network quality factor (such as, impedance component, the capacitor C of antenna matching network and emi-filter module 130
nand C
p, and/or internal resistance { R
n} and { R (j)
pthe quality factor of RLC resistance-inductance-capacitance (resistor-inductor-capacitor, the RLC) network } forming) and label ω (k)
0and τ represents respectively natural frequency (natural frequency) and relevant time constant (time constant), the voltage of detection is expressed as follows:
v(t)＝1+K
v e
-t/τcos(ω
0t+Φ) (1)
Wherein, τ=((2Q)/ω
0) and this embodiment in COEFFICIENT K
vit can be a constant.In order not violate short-range communication standard-required, at time out T
pausebe greater than ((2 τ) * 2) (that is, T
pause>4 τ), and the frequency f of the carrier wave transmitting for data be conventionally positioned in the situation of 13.56MHz, as ω
0=2 π f, as follows for the aerial network quality factor Q of 106kbps:
Wherein, due to time out T
pauserelevant to ASK data rate, so the maximum of aerial network quality factor Q depends on ASK data rate.It should be noted that this ASK data rate and time out T
pausecan change respectively and can equal some other values.For example, for short-range communication 212kbps, time out T
pause1.5 μ s, for 424kbps, time out T
pause0.75 μ s, all the other the like.As a result of, along with the data rate raising, the maximum permissible value of antenna Q value reduces, so need adaptive Q tuning.
A beneficial effect of the present invention is that method of the present invention and equipment can be in the situation that do not change the dynamic tuned antenna network quality factor of antenna matching network in nfc apparatus.In addition, compare to relevant technology, because the quantity of the outer member outside chip is less than the quantity of the outer member outside the chip of traditional nfc apparatus, so method of the present invention and equipment can reduce relevant cost.In addition, the aerial network quality factor in suitable execution method of the present invention and equipment is tuning, can optimize the performance of each data rate.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is when being as the criterion with claims.
Claims (30)
1. control a method for an aerial network quality factor of a nfc apparatus, it is characterized in that, the method comprises:
Determine the data rate for data communication using in the different time intervals; And
When a very first time interval of determining in this different time interval, while using this first data rate to carry out data communication, control one group of internal resistance and in this very first time interval, there is one first configuration, to adjust this aerial network quality factor, wherein, this internal resistance is positioned on a chip of this nfc apparatus.
2. the method for an aerial network quality factor of control one nfc apparatus according to claim 1, is characterized in that,
The step of determining the data rate for data communication using in the different time intervals comprises:
Determine that each time interval in this different time interval is used this first data rate or one second data rate carries out data communication, wherein, this first data rate is different from this second data rate.
3. the method for an aerial network quality factor of control one nfc apparatus according to claim 2, is characterized in that,
Within one second time interval of determining in this different time interval, while using this second data rate to carry out data communication, control this group internal resistance and there is one second configuration in this second time interval, to adjust this aerial network quality factor.
4. the method for an aerial network quality factor of control one nfc apparatus according to claim 3, is characterized in that,
This second configuration is different from this first configuration.
5. the method for an aerial network quality factor of control one nfc apparatus according to claim 2, is characterized in that,
Control one group of internal resistance and in this very first time interval, there is one first configuration, to adjust the step of this aerial network quality factor, comprise:
When definite this very first time interval is used this first data rate to carry out data communication, control this group internal resistance and in this very first time interval, there is this first configuration, make this aerial network quality factor of this nfc apparatus equal one first numerical value.
6. the method for an aerial network quality factor of control one nfc apparatus according to claim 5, is characterized in that,
Within one second time interval of determining in this different time interval, while using this second data rate to carry out data communication, control this group internal resistance and within this second time interval, there is one second configuration, make this aerial network quality factor in this nfc apparatus equal a second value.
7. the method for an aerial network quality factor of control one nfc apparatus according to claim 6, is characterized in that, this second value is different from this first numerical value.
8. according to the method for an aerial network quality factor of control one nfc apparatus described in claim 1 or 2, it is characterized in that,
This internal resistance is positioned on a plurality of switchable conducting paths, between the port that the plurality of switchable conducting path couples at this chip and an antenna matching network respectively and at least one earth terminal of this chip.
9. the side of an aerial network quality factor of control one nfc apparatus according to claim 8
Method, is characterized in that,
With a plurality of switch units that are positioned on this chip of this nfc apparatus, carry out optionally to enable respectively the plurality of switchable conducting path, so that this first configuration to be set.
10. the method for an aerial network quality factor of control one nfc apparatus according to claim 8, is characterized in that,
Within one second time interval of determining in this different time interval, while using the second data rate to carry out data communication, control this group internal resistance and within this second time interval, there is one second configuration, to adjust this aerial network quality factor; And carry out optionally to enable respectively the plurality of switchable conducting path with a plurality of switch units that are positioned on this chip of this nfc apparatus, so that this second configuration to be set.
The method of one aerial network quality factor of 11. control one nfc apparatus according to claim 1, is characterized in that,
This internal resistance is the inner member of a programmable resistor array that is arranged in this chip of this nfc apparatus.
12. control the equipment of an aerial network quality factor of a nfc apparatus, it is characterized in that, this equipment comprises at least a portion of this nfc apparatus, and this equipment comprises: one group of internal resistance, be positioned at a chip of this nfc apparatus, for carry out aerial network quality because of
Son is controlled; And
One control circuit, is positioned at this chip of this nfc apparatus and couples with this group internal resistance, uses
In determining the data rate for data communication using in the different time intervals;
When a very first time interval of determining within this different time interval, while using one first data rate to carry out data communication, this control circuit is controlled this group internal resistance and in this very first time interval, is had one first configuration, to adjust this aerial network quality factor.
Establishing of one aerial network quality factor of 13. control one nfc apparatus according to claim 12
Standby, it is characterized in that,
This control circuit is specifically for determining each time interval in this different time interval and use this first data rate or one second data rate carrying out data communication, and wherein, this first data rate is different from this second data rate.
Establishing of one aerial network quality factor of 14. control one nfc apparatus according to claim 13
Standby, it is characterized in that,
Within one second time interval of determining in this different time interval, while using this second data rate to carry out data communication, this control circuit is controlled this group internal resistance and is had one second configuration in this second time interval, to adjust this aerial network quality factor.
The equipment of one aerial network quality factor of 15. control one nfc apparatus according to claim 14, is characterized in that, this second configuration is different from this first configuration.
The equipment of one aerial network quality factor of 16. control one nfc apparatus according to claim 13, is characterized in that,
This control circuit control this group internal resistance in this very first time interval, have this first configuration make this aerial network quality factor equal one first numerical value.
The equipment of one aerial network quality factor of 17. control one nfc apparatus according to claim 16, is characterized in that,
Within one second time interval of determining in this different time interval, while using this second data rate to carry out data communication, this control circuit is controlled this group internal resistance and within this second time interval, is had one second configuration, so that this aerial network quality factor equals a second value.
The equipment of one aerial network quality factor of 18. control one nfc apparatus according to claim 17, is characterized in that, this second value is different from this first numerical value.
19. according to the equipment of an aerial network quality factor of control one nfc apparatus described in claim 12 or 13, it is characterized in that,
This internal resistance is positioned on a plurality of switchable conducting paths, between the port that the plurality of switchable conducting path couples at this chip and an antenna matching network respectively and at least one earth terminal of this chip.
The equipment of one aerial network quality factor of 20. control one nfc apparatus according to claim 19, is characterized in that, also comprises:
A plurality of switch units, are positioned on this chip of this nfc apparatus, are respectively used to optionally enable the plurality of switchable conducting path, so that this first configuration to be set.
The equipment of one aerial network quality factor of 21. control one nfc apparatus according to claim 19, it is characterized in that, within one second time interval of determining in this different time interval, while using the second data rate to carry out data communication, this control circuit is controlled this group internal resistance and is had one second configuration in this second time interval, to adjust this aerial network quality factor, this equipment further comprises:
A plurality of switch units, are positioned on this chip of this nfc apparatus, are respectively used to optionally enable the plurality of switchable conducting path, so that this second configuration to be set.
22. according to the equipment of an aerial network quality factor of control one nfc apparatus described in claim 12 or 13, it is characterized in that, this internal resistance is the inner member of a programmable resistor array that is arranged in this chip of this nfc apparatus.
The equipment of one aerial network quality factor of 23. control one nfc apparatus according to claim 22, it is characterized in that, this equipment comprises: a transceiver and rectifier module, this transceiver and rectifier module are positioned on this chip of this nfc apparatus, and this transceiver and rectifier module comprise:
One reflector, is used to this nfc apparatus to transmit data;
One receiver, is used to this nfc apparatus to receive data;
One rectifier, is used to this nfc apparatus to carry out rectification operation;
Wherein, this programmable resistor array is positioned at outside this transceiver and rectifier module.
The equipment of one aerial network quality factor of 24. control one nfc apparatus according to claim 22, is characterized in that, this equipment comprises a rectifier, and this rectifier is positioned on this chip of this nfc apparatus; This rectifier is used to this nfc apparatus to carry out rectification operation, and programmable resistor array is integrated in this rectifier.
The equipment of one aerial network quality factor of 25. control one nfc apparatus according to claim 22, is characterized in that, this equipment comprises a reflector, and this reflector is positioned on this chip of this nfc apparatus; This reflector is used to this nfc apparatus to send data, and this programmable resistor array is integrated in this reflector.
The equipment of one aerial network quality factor of 26. control one nfc apparatus according to claim 22, it is characterized in that, this equipment comprises a receiver, this receiver is arranged in this chip of this nfc apparatus, this receiver is used to this nfc apparatus to receive data, and this programmable resistor array is integrated in this receiver.
27. according to the equipment of an aerial network quality factor of control one nfc apparatus described in claim 12 or 13, it is characterized in that, this equipment comprises: a transceiver and rectifier module, this transceiver and rectifier module are positioned on this chip of this nfc apparatus, and this transceiver and rectifier module comprise:
One reflector, is used to this nfc apparatus to transmit data;
One receiver, is used to this nfc apparatus to receive data;
One rectifier, is used to this nfc apparatus to carry out rectification operation;
Wherein, this internal resistance is positioned at outside this transceiver and rectifier module.
28. according to the equipment of an aerial network quality factor of control one nfc apparatus described in claim 12 or 13, it is characterized in that, this equipment comprises a rectifier, and this rectifier is positioned on this chip of this nfc apparatus; This rectifier is used to this nfc apparatus to carry out rectification operation, and this internal resistance is integrated in this rectifier.
29. according to the equipment of an aerial network quality factor of control one nfc apparatus described in claim 12 or 13, it is characterized in that, this equipment comprises a reflector, and this reflector is positioned on this chip of this nfc apparatus; This reflector is used to this nfc apparatus to send data, and this internal resistance is integrated in this reflector.
30. according to the equipment of an aerial network quality factor of control one nfc apparatus described in claim 12 or 13, it is characterized in that, this equipment comprises a receiver, this receiver is arranged in this chip of this nfc apparatus, this receiver is used to this nfc apparatus to receive data, and this internal resistance is integrated in this receiver.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361816949P | 2013-04-29 | 2013-04-29 | |
| US61/816,949 | 2013-04-29 | ||
| US14/200,023 | 2014-03-07 | ||
| US14/200,023 US9819394B2 (en) | 2013-04-29 | 2014-03-07 | Method for controlling an antenna network quality factor of a near field communication device without changing matching network, and associated apparatus |
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| CN104125592A true CN104125592A (en) | 2014-10-29 |
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Application publication date: 20141029 |