CN101159024A - Semiconductor integrated circuit device and receiving device - Google Patents
Semiconductor integrated circuit device and receiving device Download PDFInfo
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- CN101159024A CN101159024A CNA2007101383805A CN200710138380A CN101159024A CN 101159024 A CN101159024 A CN 101159024A CN A2007101383805 A CNA2007101383805 A CN A2007101383805A CN 200710138380 A CN200710138380 A CN 200710138380A CN 101159024 A CN101159024 A CN 101159024A
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Abstract
A technique that can reduce a size of a circuit in a radio receiver device such as a reader-writer device of RFID is provided. In a semiconductor integrated circuit device (IC) used for a transceiver such as a reader-writer in a UHF band electronic tag system, an operating unit including a multiplier, an adder, and a register is disposed between a baseband signal generating unit and a DAC unit. By this structure, an ASK modulation depth and a DC bias of an ASK modulation signal can be adjusted with a simple configuration.
Description
Technical field
The present invention relates to wireless communication technology, the effective technology that particularly relates to the structure of the high frequency front-end portion that uses in the read-and-write device that is applicable to the conductor integrated circuit device used at the transmitting set that can adjust emission spectrum and RFID (RadioFrequency Identification, radio-frequency (RF) identification).
Background technology
As the technology that the present inventor has studied, for example in transceiver, consider following technology.
For example, patent documentation 1 is in order to make the setting that is connected to the modulation circuit in the R-T unit that epigyny device and information storage medium carry out radio communication, change, it is easy that the deviation adjustment becomes, thereby carry out and the corresponding radio communication of multiple standard, and by the digital section with the control circuit that comprises CPU and storer, simulation part, capacitor and coil constitute, and then digital section also has modulation circuit, and 8 emission data will sending here from CPU are parallel data, from it being transformed into the shift register of serial data, to encoding from the serial data of this shift register and degree of modulation to sending here equally from CPU, two registers that the parallel data that the weighting of output level is used latchs, and export to simulation part from the selection circuit of the output of two registers being selected based on the coding of code generator.
In addition, patent documentation 2 relates to the wireless device that carries out burst transmissions, for rising edge by making burst, the transmitter of spread spectrum when negative edge smoothly suppresses burst transmissions are provided, and constitute via the power supply terminal supply line voltage of the circuit with time constant to the amplifier that is transfused to high-frequency input signal, simultaneously via the switch that utilizes the control signal action with supply voltage connection/cut-out, obtain the high frequency output signal of the burst shape that rises smoothly, descend according to control signal thus.
Non-patent literature 1 relates to the restraint device and technology reference launch time in the characteristic test method of internal wireless radio station (identification of 950MHz frequency band moving body).
Non-patent literature 2 relates to 950MHz frequency band moving body identification with the restraint device and technology reference launch time in the characteristic test method of specific weak machine.
In addition, the technology below the consideration in the read-and-write device of RFID.
The modulation system of delivering to the signal of read-and-write device from the RFID label is ASK (Amplitude Shift Keying, amplitude shift keying) modulation, this modulator approach generally is that load-modulate (is utilized the connection/cut-out of the switch that is provided with etc. between antenna terminal, according to the emission data antenna impedance is changed, so that from the modulation system of the reflection wave quantitative changeization of RFID label).
Read-and-write device carries out detection to the ASK modulating wave and amplifies, and decodes after two-value changes into digital value, obtains the correct answer signal from RFID thus.Here, owing to be arranged on impedance matching state different that switch between the antenna of RFID label is antenna and the IC chip of the RFID label under the dissengaged positions, the change direction difference of the signal in the reflection wave.
For example, when the state of approaching coupling fully,, can make impedance matching state variation by the switch connection between the antenna that will be arranged on the RFID label.Because reflection wave is less under the impedance matching state, so become from cut-out under the situation of connection at the switch that is provided with between the antenna of RFID label, the reflection wave level increases.
On the other hand, departing under the situation of coupling, by the switch connection between the antenna that will be arranged on the RFID label, the impedance matching state can improve conversely.Reflective level reduces in the case.
The RFID label is attached on the various things and uses, but because the permittivity of attaching object is non-constant, so the impedance matching state of antenna and IC chip changes.As a result, the change direction that can cause the signal of aforesaid reflection wave changes.
No matter read-and-write device is the change direction at the signal of reflection wave is that forward (situation that reflection wave increases) still all needs received signal under the negative sense (situation of reflection wave minimizing), and has prepared to receive the special demodulating circuit of each signal.
In addition, before read-and-write device emission electric wave, communicate intrusively in order other reading and writing device system not to be produced, just need the frequency channels that plan to use be used confirm, be carrier sense (this is the situation of Japanese electric wave method, and the U.S. realizes that because of utilizing frequency hopping sharing does not need).
In order to realize this function, consider Several Methods according to the receiving system mode of desired wave.For example have resemble be transformed into IF (Intermediate frequency, intermediate frequency) frequency mode, heterodyne mode and low IF (Low-IF) mode etc. that carrier frequency are directly converted to the DC value by direct conversion after, the method for carrying out demodulation with the ASK demodulator circuit.
In addition, as the technology relevant, for example can list technology that patent documentation 3, non-patent literature 1 and non-patent literature 2 put down in writing etc. with the read-and-write device of this RFID.
Patent documentation 3 relates to following radio frequency identification (RFID) interrogator: be used to be transmitted to wireless frequency interrogating signal the 1st antenna, that select in the pseudo random number mode, and, receive through the modulation wireless frequency signal of continuous wave backscattering from the reflection of RFID labeling apparatus by the 2nd antenna that is coupled on the beat reception device that takes out data.
Non-patent literature 1 relates to the carrier sense function in the characteristic test method of internal wireless radio station (identification of 950MHz frequency band moving body).
Non-patent literature 2 relates to 950MHz frequency band moving body and discerns with the carrier sense function in the characteristic test method of specific weak machine.
[patent documentation 1] spy opens the 2000-182003 communique
[patent documentation 2] spy opens flat 9-8675 communique
[patent documentation 3] special table 2004-535700 communique
[non-patent literature 1] " be used for the internal wireless radio station, use to surpass 952MHz and at the characteristic test method of 954MHz with the wireless device (internal wireless (identification of 950MHz frequency band moving body)) of the electric wave of lower frequency ", the 4.0th edition, juridical person Telecom EngineeringCenter (テ レ コ system エ Application ジ ニ ア リ Application グ セ Application one), on January 31st, 2006, p.23,24,27-30,34,35
[non-patent literature 2] " be used to use above 952MHz and at 955MHz with the moving body identification of the electric wave of lower frequency characteristic test method with the wireless device (950MHz frequency band moving body is discerned and used specific weak machine) of specific small power radio station ", the 1.0th edition, juridical person Telecom Engineering Center, on January 31st, 2006, p.18,19,22-24,25
Summary of the invention
But, for the technology of aforesaid transceiver, following situation that the result of present inventor's process research is clear and definite.
For example, the technology of patent documentation 1 is owing to carry out software control, thus need highly large-scale computing circuit (CPU and information storage medium), thus circuit scale is bigger.Therefore, not needing to be not suitable for the complicated transmitting set of adjusting and the device of miniaturization as target.
In addition,, need the time, and the required time is handled in cost so reply owing to handle computing with software mode.
And then, the spread spectrum when not managing to suppress burst communication, thus need be as the external treatment of patent documentation 2.And, be not suitable for needing the rise time and need transmitting set burst communication, that need carry out spectrum control.
In addition, for the technology of the read-and-write device of aforesaid RFID, through the result of research clear and definite 2 following problems.
The first, for example, such as described above, no matter the signal change direction that receives from the read-and-write device reflection wave of replying of RFID is that forward or negative sense all need restituted signal correctly, thereby need to handle the special demodulating circuit of each signal.Therefore preparing special-purpose demodulator circuit respectively makes circuit scale become big.Under the situation of IC chip, there is chip size to become big shortcoming.
The second, in order to realize aforesaid carrier sense, as heterodyne mode and low IF mode etc., after being transformed into the IF frequency, carry out the method for demodulation, the mechanism that suppresses image frequency (image frequency) need be set separately, thereby have unfavorable on the circuit scale with the ASK demodulator circuit.
In addition, under the situation of the direct conversion regime that directly obtains baseband signal, because carrier frequency component is transformed into DC, so be only to be the DC component under the situation of non-modulation ripple at input signal, therefore under the less situation of input signal, with the difficulty that becomes separating of the DC offset voltage that produces in the circuit.
The key diagram of the situation of the frequency transformation when Figure 12 is the carrier sense execution of representing in the direct conversion regime.
In addition, in the following description, " common signal Processing " expression be not carrier sense but when receiving answer signal from RFID from directly being transformed into the signal processing system of binaryzation.
As shown in figure 12, in direct conversion regime, exist under the situation of modulating wave on the frequency channels of carrier sense wanting to carry out, identical frequency band when frequency transformation being become with reception from the replying of RFID after direct conversion is so can use the signal Processing of common signal processing system.But, exist under the situation of non-modulation ripple on the frequency channels of carrier sense wanting to carry out, the frequency after the frequency transformation becomes DC, thereby under the less situation of input signal, exist with circuit in the problem of separating the difficulty that becomes of the DC offset voltage that produces.
The key diagram of the situation of the frequency transformation when Figure 13 is the carrier sense execution of representing in the heterodyne mode.
As shown in figure 13, owing under the heterodyne mode, modulating wave and non-modulation ripple are transformed into the IF frequency together, so the problem in the direct conversion regime can not take place.But,, need the problem prepared separately thereby exist so can't dual-purpose be used for suppressing the wave filter of the common signal processing system of undesired signal because the IF frequency after the frequency transformation is higher.In addition, owing to compare, become strict, difficulty so Filter Design becomes usually with respect to the standard of the frequency span of centre frequency with the wave filter of common signal processing system.
The key diagram of the situation of the frequency transformation when Figure 14 is the carrier sense execution of representing in the low IF mode.
As shown in figure 14, owing under low IF mode, also be that modulating wave and non-modulation ripple are transformed into the IF frequency together, so the problem in the direct conversion regime can not take place.In addition, though owing to can't dual-purpose be used for suppressing the wave filter of the common signal processing system of undesired signal, and existence need be prepared the problem of wave filter separately, but because the IF frequency ratio after the frequency transformation is lower, so compares with the situation of heterodyne mode with respect to the standard of the frequency span of centre frequency and to be relaxed, so the Filter Design ratio is easier to.
But, under the situation of low IF mode, because image frequency becomes in the band (in-band), so can't suppress with antenna filter, need utilize mirror image disturb to suppress frequency mixer technology etc. and suppress, thereby also have the problem that need be used for the circuit of this purpose in addition with circuit mode.
Thereby, an object of the present invention is to provide a kind of technology that in wireless transmitter, can reduce circuit scale.
Above-mentioned and other purpose of the present invention and new feature can become clear and definite from the record and the accompanying drawing of this instructions.
If the summary to the representational invention in the disclosed invention of the application describes simply, and is then as described below.
That is, conductor integrated circuit device of the present invention can easily carry out the adjustment of the DC biasing of ASK degree of modulation and ASK modulation signal by between baseband signal generating unit and DAC portion multiplier and totalizer being set.
In addition, receiving trap of the present invention is a kind of receiving trap of direct conversion regime, it is characterized in that, comprising: the 1st amplifier that is transfused to high-frequency received signal; Be transfused to the detuner of the output of above-mentioned the 1st amplifier; Be transfused to the wave filter of the output of above-mentioned detuner; Be transfused to the 2nd amplifier of the output of above-mentioned wave filter; And the binarization circuit that is transfused to the output of above-mentioned the 2nd amplifier, wherein, above-mentioned binarization circuit has and adds skew additive operation circuit system and subtract skew additive operation circuit system, perhaps, it is characterized in that comprising: the detecting circuit that is transfused to the output of above-mentioned the 2nd amplifier; And the comparator circuit that is transfused to the output of above-mentioned detecting circuit, perhaps, it is characterized in that: above-mentioned binarization circuit has and adds skew additive operation circuit system and subtract skew additive operation circuit system, comprising: the detecting circuit that is transfused to the output of above-mentioned the 2nd amplifier; And the comparator circuit that is transfused to the output of above-mentioned detecting circuit.
If it is the effect that representational invention obtained in the disclosed invention of the application is described simply, then as described below.
(1) computing circuit of irrelevant information storage medium and height, thus can easily realize highly integrated, miniaturization.
(2) by adjust degree of modulation and DC biasing etc. according to the establishment state of communication, in the means of communication that not too needs call duration time, the communication success ratio improves, as the performance raising of system.
(3) owing to utilize the operational part of DAC prime to adjust, can carry out careful adjustment.
(4) by making the interlock of baseband signal generating unit and operational part, the spread spectrum of seeing in the time of can being suppressed at rising edge, negative edge, thus do not need the time constant circuit externally realized.
(5) in the receiving trap of read-and-write device of RFID etc., can reduce components number and reduce circuit scale simultaneously, and can reduce manufacturing cost or erection space.
Description of drawings
Fig. 1 (a) and (b), (c) are expression ISO/IEC, 18000-6, the figure of the envelope standard in the Type C.
Fig. 2 (a) and (b) are block diagrams of structure of the conductor integrated circuit device of expression embodiment of the present invention 1.
Fig. 3 is the figure of waveform processing example in the operational part in the conductor integrated circuit device of expression embodiment of the present invention 1.
Fig. 4 (a) and (b) are block diagrams of structure of the conductor integrated circuit device of expression embodiment of the present invention 2.
Fig. 5 is the block diagram of structure of the conductor integrated circuit device of expression embodiment of the present invention 3.
Fig. 6 is the block diagram of basic structure of the receiving trap of expression embodiment of the present invention 4.
Fig. 7 is the block diagram of concrete structure of the receiving trap of expression embodiment of the present invention 4.
Fig. 8 (a) and (b) are figure of detailed structure of the binarization circuit of presentation graphs 7.
Fig. 9 (a) and (b), (c) be expression add offset adder and subtract offset adder be input as positive signal the time the figure of waveform of each signal.
Figure 10 (a) and (b), (c) be expression add offset adder and subtract offset adder be input as negative signal the time the figure of waveform of each signal.
Figure 11 is the key diagram of the situation of the frequency transformation of the carrier sense in the receiving trap of expression embodiment of the present invention 4 when carrying out.
The key diagram of the situation of the frequency transformation when Figure 12 is the carrier sense execution of representing in the direct conversion regime.
The key diagram of the situation of the frequency transformation when Figure 13 is the carrier sense execution of representing in the heterodyne mode.
The key diagram of the situation of the frequency transformation when Figure 14 is the carrier sense execution of representing in the low IF mode.
Figure 15 is the block diagram of the required basic structure of the carrier sense among expression the present invention.
Figure 16 is the block diagram of the carrier sense embodiment of circuit among expression the present invention.
Description of reference numerals
201 baseband signal generating units
202 operational parts
203DAC portion
204 frequency mixer portions
205 amplifier portions
206 antennas
207 registers
208 multipliers
209 totalizers
401 digital filters
501 circulators
502 acceptance divisions
503 demodulation sections
504 accepting state detection units
101,1201,1208,1209,1001,1005 amplifiers
102 detuners
103,1206,1207,1004 wave filters
104 digital signal circuit
1202,1002 oscillators
120390 degree phase-shift circuits
1204,1205,1003 frequency mixer
1210,1211 binarization circuits
1301 add offset adder
1302,1304,1007 comparers
1303 subtract offset adder
1401～1408 signals
1006 wave detectors
Embodiment
Below, based on accompanying drawing embodiments of the present invention are at length described.In addition, at the whole figure that are used for illustrating embodiment,, and omit its repeat specification as principle additional same mark on same parts.
The present invention for example relates to the transmitting set in the electronic labelling system.About electronic labelling system, by ISO/IEC, JTC1 has advanced International standardization, and UHF frequency band electronic labelling system uses 860～960MHz frequency band.In addition, ISO/IEC, standardization under the JTC1 is except wireless technology condition (modulation system, coded system, communication speed etc.), also stipulate for communication protocol as the linker of read write line and electronic tag, formulated ISO/IEC now, 18000-6, type A, these two kinds of specifications of type B.
In addition, in EPCglobal (global product electronic code administrative center), also carry out the standardization of electronic labelling system, as the UHF frequency band, formulated Class1, Generation2 (the 2nd generation of the 1st class) specification.EPCglobal is with this Class1, and the Generation2 specification is submitted to ISO/IEC, JTC1, and as ISO/IEC, 18000-6, Type C is standardized.
Fig. 1 is expression ISO/IEC, 18000-6, the figure of the envelope standard in the Type C, (a) expression ASK modulated waveform, (b) expression PR-ASK modulated waveform, (c) expression RF envelope parameters.
The present invention is in order to satisfy standard shown in Figure 1, and in research as corresponding ISO/IEC, 18000-6 invents in the conductor integrated circuit device that the read write line of the transmitting set of Type C is used.The present invention also controls by digital circuit in this specification could bring degree of modulation (the Modulation Depth of influence to communication; And rising edge time (the RF Envelope Rise Time that spectrum mask (Transmit mask) is brought influence (A-B)/A); Tr), negative edge time (RF Envelope Fall Time; Tf) and pulse width (RFPulsewidth; PW).
In addition, the rising edge the during burst communication that the present invention has also considered to be put down in writing in non-patent literature 1 and the non-patent literature 2 (TELEC-T240, T242, launch time control device regulation), the spectrum mask of negative edge.
(embodiment 1)
Fig. 2 (a) is the block diagram of structure of the conductor integrated circuit device of expression embodiment of the present invention 1, and Fig. 2 (b) is the block diagram of the structure of the operational part 202 shown in the presentation graphs 2 (a).
One example of structure of the conductor integrated circuit device of present embodiment 1 at first, is described by Fig. 2.The conductor integrated circuit device of present embodiment 1, for example be used as the conductor integrated circuit device (IC) that uses in the transmitting set of read write line in UHF frequency band electronic tag (RFID) system etc., be formed on the semi-conductor chip by means of known semiconductor fabrication.This conductor integrated circuit device with wireless transmitter functionality is for example by constituting as the lower part: generate the baseband signal generating unit 201 of emission with data; The operational part 202 that constitutes by multiplier 208, totalizer 209 and register 207 in order to control degree of modulation and DC biasing; Digital signal conversion is become DAC (digital/analog converter) portion 203 of simulating signal; To launching the frequency mixer portion 204 that data and carrier wave carry out mixing; And amplifier portion 205 etc.In addition, the register 207 in the operational part 202, multiplier 208 and totalizer 209 are that hardware constitutes by digital circuit.
The emission that baseband signal generating unit 201 generates is imported into operational part 202 with data.Operational part 202 utilizes multiplier 208 and totalizer 209 to carry out computing according to impose a condition (operation coefficient) in the register 207, and exports to DAC portion 203 in order to control degree of modulation and DC biasing etc.In DAC portion 203, the digital signal of operation result is exported to frequency mixer portion 204 after being transformed into simulating signal.In frequency mixer portion 204, export to amplifier portion 205 after by mixing from the emission data of DAC portion 203 and carrier wave.In amplifier portion 205, export to antenna 206 through the signal of mixing after by power amplification, modulating wave is by antenna 206 wireless transmit.
Fig. 3 is the figure of waveform processing example of the operational part 202 in the conductor integrated circuit device of expression present embodiment 1.
In Fig. 3, baseband waveform (a) is the emission data that baseband signal generating unit 201 is generated.In (a), show, but if show then the baseband waveform that becomes (b) with 256 values with 2 values.Degree of modulation is 100% in the case.
256 baseband waveforms that are worth for this (b) if carry out 1/2 multiplying by the multiplier 208 of operational part 202, then become the waveform shown in (c).Degree of modulation also is 100% in the case.
For the waveform of (c), then become waveform shown in (d) if carry out 128 additive operations by the totalizer 209 of operational part 202.Degree of modulation is 50% in the case.
For the waveform of the degree of modulation 50% of (d),, then become the waveform shown in (e) if carry out the burst control additive operation by the totalizer 209 of operational part 202.The burst control additive operation when RF-ON (rising edge) along with effluxion little by little increases progressively, when RF-OFF (negative edge) along with effluxion little by little successively decreases.
Having under the situation of digital filter, for the waveform of (e), as if the waveform that then becomes by digital filter shown in (f).
As described above, baseband waveform is only being implemented under the situation of multiplying, waveform changes on amplitude direction.Change for the equalization on the amplitude direction, can carry out the adjustment of degree of modulation by implementing skew additive operation (the B value of Fig. 1) afterwards.Under the situation about in parasitism, showing, cause the variation of energy summation (output power).
Under the situation of only having implemented additive operation, totalizer causes the variation of the DC component of baseband signal.Therefore, degree of modulation is changed, perhaps make variations such as gross energy and peak power.
When rising edge, negative edge, make under the situation of totalizer action, by regularly carrying out additive operation (at negative edge time add (negative value)) at each on the time shaft, just can reduce the power spectrum of high frequency, thus the adjustment of the spectrum mask can carry out rising edge, negative edge the time.
Thereby,, can easily adjust the DC biasing of ASK degree of modulation and ASK modulation signal by between baseband signal generating unit and DAC portion, carrying multiplier and totalizer.
In addition, realize,, can shorten the processing time so compare with the realization that utilizes software owing to handling by digital circuit.
And then, worsen for the frequency spectrum that becomes problem when rising edge, the negative edge, also realize by the computing that utilizes digital circuit, do not need plug-in mimic channel.In addition, make under the integrated situation of mimic channel, though adjustment and test need the time, owing to utilize digital circuit to realize that so do not need to adjust, the test duration also can shorten.
(embodiment 2)
Fig. 4 is the block diagram of structure of the conductor integrated circuit device of expression embodiment of the present invention 2.
The conductor integrated circuit device of present embodiment 2 is the conductor integrated circuit devices with respect to above-mentioned embodiment 1, has inserted the example of digital filter 401 between baseband signal generating unit 201 and DAC portion 203.
By the additional character wave filter, it is more level and smooth that the waveform of rising edge and negative edge becomes.
(embodiment 3)
Fig. 5 is the block diagram of structure of the conductor integrated circuit device of expression embodiment of the present invention 3.
The conductor integrated circuit device of present embodiment 3 is with respect to the conductor integrated circuit device of above-mentioned embodiment 2 (Fig. 4 (a)), has added the example of the accepting state detection unit 504 of the circulator 501 of separting transomission and received signal, the acceptance division 502 of reception modulating wave, the demodulation section 503 that takes out raw data from modulating wave and judgement accepting state.
Based on the raw data of process demodulation in demodulation section 503, in accepting state detection unit 504, judge, and, change the operation coefficient in the register 207 based on this result of determination.
In the communication system of implementing backscattering communication, can adjust emission state (percentage modulation DC biasing etc.) by judge accepting state by accepting state detection unit 504.
Thereby, according to the conductor integrated circuit device of present embodiment 1～3, the computing circuit etc. of irrelevant information storage medium and height, thus can easily realize highly integrated, miniaturization and do not need large-scale circuit.
In addition, adjust degree of modulation and DC biasing etc. by the establishment state of utilization communication, in the means of communication that not too needs call duration time, the communication success ratio improves, as the performance raising of system.
In addition, owing to utilize the operational part of DAC prime to adjust, can carry out careful adjustment.
In addition, by making the interlock of baseband signal generating unit and operational part, the spread spectrum of seeing in the time of can being suppressed at rising edge, negative edge, thus do not need the time constant circuit externally realized.
The present invention goes for adopting the transmitter integrated circuit of the read-and-write device of passive RFID.In addition, can also be applicable to the transmitter integrated circuit that needs miniaturization that needs the ASK modulation.
This is because passive RFID does not have power supply, so must be easy communication process, in addition, occupies the time of channel and determines, so call duration time is shorter.And then also because in the communication of the RFID that has adopted the UHF frequency band, the restriction strictness of spectrum mask needs to suppress because the spread spectrum that burst communication causes.
(embodiment 4)
In present embodiment 4, the receiving trap as an embodiment of the acceptance division shown in Figure 5 502 of above-mentioned embodiment 3 and demodulation section 503 is described.
Fig. 6 is the block diagram of basic structure of the receiving trap of expression embodiment of the present invention 4, and Fig. 7 is the block diagram of concrete structure of the receiving trap of expression one embodiment of the present invention.
One example of basic structure of the receiving trap of present embodiment at first, is described by Fig. 6.The receiving trap of present embodiment 4 for example is used as the read-and-write device of RFID, by SIC (semiconductor integrated circuit) formations such as (IC).This receiving trap is the receiving trap of ASK receiving system, is made of amplifier 101, detuner 102, wave filter 103, digital signal circuit 104 etc.And, high-frequency received signal is imported into amplifier 101, and the output of amplifier 101 is imported into detuner 102, and the output of detuner 102 is imported into wave filter 103, the output of wave filter 103 is imported into digital signal circuit 104, from digital signal circuit 104 output received signals.
The concrete formation of the receiving trap of presentation graphs 6 among Fig. 7.The receiving trap of Fig. 7 adopts direct conversion regime.
As shown in Figure 7, the receiving trap of present embodiment 4 is made of amplifier 1201, oscillator 1202,90 degree phase-shift circuits 1203, frequency mixer 1204,1205, wave filter 1206,1207, amplifier 1208,1209, binarization circuit 1210,1211 etc.And, high-frequency received signal is imported into amplifier 1201, the output of oscillator 1202 is imported into 90 degree phase-shift circuits 1203, the output of the output of amplifier 1201 and 90 degree phase-shift circuits 1203 is imported into frequency mixer 1204,1205, the output of frequency mixer 1204,1205 is imported into wave filter 1206,1207, the output of wave filter 1206,1207 is imported into binarization circuit 1210,1211, from binarization circuit 1210 output Iout, from binarization circuit 1211 output Qout.
Fig. 8 is the figure of detailed formation of the binarization circuit 1210,1211 of presentation graphs 7.
The subtracting of skew additive operation circuit system and Fig. 8 (b) that add that binarization circuit 1210 and the binarization circuit 1211 of Fig. 7 possesses Fig. 8 (a) respectively is offset the additive operation circuit system.The skew additive operation circuit system that adds of Fig. 8 (a) constitutes by adding offset adder 1301, comparer 1302 etc.The skew additive operation circuit system that subtracts of Fig. 8 (b) constitutes by subtracting offset adder 1303, comparer 1304 etc.The input signal 1406 and 1407 that adds the input signal 1401 and 1402 of offset adder 1301, the input signal 1403 and 1404 of comparer 1302, the input signal 1401 and 1402 that subtracts offset adder 1303, comparer 1304 is respectively the relation of differential wave.In addition, the output signal 1405 of comparer 1302 is respectively single signal with the output signal 1408 of comparer 1304.
Fig. 9 be expression add offset adder 1301 and subtract offset adder 1303 be input as positive signal the time the figure of waveform of each signal.The waveform input signal (signal 1401,1402) that expression adds offset adder 1301 and subtracts offset adder 1303 among Fig. 9 (a).Expression utilization adds the waveform (signal 1403,1404) after offset adder 1301 is offset additive operation and utilizes the binaryzation of comparer 1302 to export (signal 1405) among Fig. 9 (b).Expression utilization subtracts the waveform (signal 1406,1407) after offset adder 1303 is offset additive operation and utilizes the binaryzation of comparer 1304 to export (signal 1408) among Fig. 9 (c).
Shown in Fig. 9 (b), (c), be input as under the situation of positive signal, utilize the binaryzation output (signal 1405) of comparer 1302 to be low level, but utilize the binaryzation output (signal 1408) of comparer 1304 to produce pulse.Thereby, detect the initial rising edge edge in signal 1405 and the signal 1408, select signals output and fixing from signal 1405 and signal 1408.In the case, signal 1408 selected and carry out after signal Processing.
Figure 10 be expression add offset adder 1301 and subtract offset adder 1303 be input as negative signal the time the figure of waveform of each signal.The waveform input signal (signal 1401,1402) that expression adds offset adder 1301 and subtracts offset adder 1303 among Figure 10 (a).Expression utilization adds the waveform (signal 1403,1404) after offset adder 1301 is offset additive operation and utilizes the binaryzation of comparer 1302 to export (signal 1405) among Figure 10 (b).Expression utilization subtracts the waveform (signal 1406,1407) after offset adder 1303 is offset additive operation and utilizes the binaryzation of comparer 1304 to export (signal 1408) among Figure 10 (c).
Shown in Figure 10 (b), (c), be input as under the situation of negative signal, utilize the binaryzation output (signal 1408) of comparer 1304 to be low level, but utilize the binaryzation output (signal 1405) of comparer 1302 to produce pulse.Thereby, detect the initial rising edge edge in signal 1405 and the signal 1408, from signal 1405 and signal 1408, select signal output and fixing.In the case, signal 1405 is selected, and the signal Processing after carrying out.
In addition, in Fig. 9 and Figure 10, solid line and dotted line are the relations of differential wave.In addition, in Fig. 9 (a) and Figure 10 (a), signal 1401 is unmodulated signal level with signal 1402 superposed part.
As described above, be provided with respectively and the corresponding comparer 1302,1304 of positive signal, negative signal with respect to the unmodulated signal level of received signal, by detecting the aitiogenic comparer 1302,1304 from no signal condition elder generation, selecting also, output fixing signal carries out signal Processing.
Thus, can positive signal, negative signal not distinguished the ready signal treatment circuit, and carry out signal Processing, thereby can cut down circuit scale with a circuit.In addition, selecteed comparer 1302,1304 is replied and is finished receiving and be disengaged selection along with one, selects suitable comparer 1302,1304 in next is replied.By this action, the receiving feature of read-and-write device improves.
Figure 15 is the block diagram of the needed basic structure of carrier sense among expression the present invention.
As shown in figure 15, the needed basic structure of the carrier sense among the present invention is made up of amplifier 1001, oscillator 1002, frequency mixer 1003, wave filter 1004, amplifier 1005, wave detector 1006, comparer 1007 etc.To amplifier 1001 input high-frequency received signals, to the output of frequency mixer 1003 input oscillators 1002 and the output of amplifier 1001, output to wave filter 1004 input mixers 1003, output to amplifier 1005 input filters 1004, output to wave detector 1006 input amplifiers 1005, to the output of comparer 1007 input wave detectors 1006, and outgoing carrier is intercepted.
Here, the output frequency with oscillator 1002 is made as the frequency that obtains the low IF below the channel frequency separation.
Figure 16 is the block diagram of the carrier sense embodiment of circuit among expression the present invention.
As shown in figure 16, this carrier sense circuit has appended wave detector 1006 and comparer 1007 after the amplifier 1208 of the receiving trap of above-mentioned Fig. 7.
Figure 11 is the key diagram of the situation of the frequency transformation of the carrier sense in the receiving trap of expression present embodiment 4 when carrying out.
If carry out frequency transformation with the local frequencies that is lower than channel frequency, then as shown in figure 11, be not only modulating wave, non-modulation ripple also is transformed into the IF frequency.Because roughly same frequency band when this IF frequency has with direct conversion, thus can the shared wave filter that is in order to suppress unwanted signal in the common signal processing system, thus have the advantageous point that does not need to be provided with separately wave filter.
In addition, different with common low IF mode, as shown in figure 11, the image frequency that can't separate owing to there is not the frequency coincidence after the frequency transformation is not so need the advantage of mirror image interference mitigation technology in addition.
Thereby, in the receiving trap of present embodiment 4, when receiving, common answer signal, when carrier sense, uses " the low IF mode of IF frequency that channel frequency separation following " of its IF frequency as the low frequency below the channel frequency with direct conversion regime action.
Thereby, when common signal receives, carry out direct switching motion, so do not need to suppress the mechanism of image frequency.And when carrier sense, be low IF frequency below the channel frequency separation by adopting its IF frequency, can be low IF but do not need image frequency to suppress the signal Processing that mechanism ground does not carry out modulating wave and non-modulation ripple.
Though abovely based on embodiment the invention of being finished by the present inventor is illustrated particularly, the present invention is not limited to above-mentioned embodiment, and is self-evident, can carry out all changes in the scope that does not break away from its main spirit.
For example,, be not limited thereto, also can be suitable for for the transceiver system of other frequency band though in above-mentioned embodiment 1～3, UHF frequency band electronic labelling system is illustrated.
In addition,, be not limited thereto, also can be suitable for for other receiving trap though the receiving trap to read-and-write device of RFID etc. is illustrated in above-mentioned embodiment 4.
Utilizability on the industry
The present invention goes for adopting the transceiver of read-and-write device of passive RFID with collection Become circuit. In addition, can also be applicable to the transceiver usefulness that needs miniaturization that needs the ASK modulation Integrated circuit.
Claims (13)
1. a conductor integrated circuit device is characterized in that, comprising:
Generate the baseband signal generating unit of emission with data;
The emission of above-mentioned baseband signal generating unit generation is carried out the operational part of calculation process with data;
To become Analog signals'digital/analog converting circuit from the digital signal conversion of above-mentioned operational part output; And
The frequency mixer portion that signal and carrier wave from the output of above-mentioned digital-to-analog translation circuit are carried out mixing,
Wherein, above-mentioned operational part has the register of the operation coefficient of above-mentioned multiplier of multiplier, totalizer and maintenance and above-mentioned totalizer.
2. according to the conductor integrated circuit device of claim 1 record, it is characterized in that:
Calculation process in the above-mentioned operational part is to adjust degree of modulation and DC biasing at above-mentioned emission with data.
3. according to the conductor integrated circuit device of claim 1 record, it is characterized in that:
Above-mentioned operational part is made of the hardware that utilizes digital circuit.
4. according to the conductor integrated circuit device of claim 1 record, it is characterized in that:
Calculation process in the above-mentioned operational part is at above-mentioned emission data, when rising edge along with effluxion increases progressively, when negative edge along with effluxion successively decreases.
5. according to the conductor integrated circuit device of claim 1 record, it is characterized in that, also comprise:
Receive the acceptance division of modulating wave;
From the received modulating wave of above-mentioned acceptance division, take out the demodulation section of raw data; And
Judge the accepting state detection unit of accepting state based on the output of above-mentioned demodulation section,
Wherein, change operation coefficient in the above-mentioned register based on the result of determination of above-mentioned accepting state detection unit.
6. according to the conductor integrated circuit device of any record in the claim 1～5, it is characterized in that:
Above-mentioned conductor integrated circuit device is used to the transmitter of UHF frequency band electronic labelling system.
7. the receiving trap of a direct conversion regime is characterized in that, comprising:
Be transfused to the 1st amplifier of high-frequency received signal;
Be transfused to the detuner of the output of above-mentioned the 1st amplifier;
Be transfused to the wave filter of the output of above-mentioned detuner;
Be transfused to the 2nd amplifier of the output of above-mentioned wave filter; And
Be transfused to the binarization circuit of the output of above-mentioned the 2nd amplifier,
Wherein, above-mentioned binarization circuit has and adds skew additive operation circuit system and subtract skew additive operation circuit system.
8. according to the receiving trap of claim 7 record, it is characterized in that:
The above-mentioned skew additive operation circuit system that adds has: the differential wave to the output of above-mentioned the 2nd amplifier adds the 1st totalizer that is offset additive operation; With the 1st comparer of the differential wave of the output that is transfused to above-mentioned the 1st totalizer,
The above-mentioned skew additive operation circuit system that subtracts has: the 2nd totalizer that the differential wave of the output of above-mentioned the 2nd amplifier is subtracted the skew additive operation; The 2nd comparer with the differential wave of the output that is transfused to above-mentioned the 2nd totalizer.
9. according to the receiving trap of claim 8 record, it is characterized in that:
Under above-mentioned the 2nd amplifier was output as situation with respect to the positive signal of unmodulated signal level, above-mentioned the 2nd comparer was selected,
Under above-mentioned the 2nd amplifier was output as situation with respect to the negative signal of unmodulated signal level, above-mentioned the 1st comparer was selected.
10. according to the receiving trap of claim 8 record, it is characterized in that:
One side in above-mentioned the 1st comparer and above-mentioned the 2nd comparer, that its output is risen earlier is selected, and the signal Processing after carrying out.
11. the receiving trap according to claim 8 record is characterized in that:
Above-mentioned receiving trap is used to the read-and-write device that RFID uses.
12. the receiving trap of a direct conversion regime is characterized in that, comprising:
Be transfused to the 1st amplifier of high-frequency received signal;
Be transfused to the detuner of the output of above-mentioned the 1st amplifier;
Be transfused to the wave filter of the output of above-mentioned detuner;
Be transfused to the 2nd amplifier of the output of above-mentioned wave filter;
Be transfused to the detecting circuit of the output of above-mentioned the 2nd amplifier; And
Be transfused to the comparator circuit of the output of above-mentioned detecting circuit,
Wherein, when carrying out carrier sense, adopt the low IF mode of IF frequency below channel frequency separation.
13. the receiving trap according to claim 12 record is characterized in that:
Above-mentioned receiving trap is used to the read-and-write device that RFID uses.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006210353 | 2006-08-01 | ||
| JP2006210360 | 2006-08-01 | ||
| JP2006210353 | 2006-08-01 | ||
| JP2007089313 | 2007-03-29 |
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| Publication Number | Publication Date |
|---|---|
| CN101159024A true CN101159024A (en) | 2008-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101383805A Pending CN101159024A (en) | 2006-08-01 | 2007-08-01 | Semiconductor integrated circuit device and receiving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101159024A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708338A (en) * | 2011-02-28 | 2012-10-03 | 卡西欧计算机株式会社 | Communication apparatus and computer program product |
| CN103188187A (en) * | 2011-12-27 | 2013-07-03 | 博通集成电路（上海）有限公司 | High-linearity ASK modulation method |
| CN103493071A (en) * | 2011-02-21 | 2014-01-01 | 索尼公司 | Signal processing device, signal processing method, and receiving device |
| CN104981822A (en) * | 2013-02-15 | 2015-10-14 | 株式会社理光 | Amplifier circuit, antenna module, and radio communication device |
| CN106407533A (en) * | 2016-09-06 | 2017-02-15 | 北京深维科技有限公司 | Comprehensive optimization method of register |
| CN105900348B (en) * | 2014-01-13 | 2018-12-14 | 克莱尔瓦扬技术有限公司 | Use the RF system of the PR-ASK with quadrature shift |
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2007
- 2007-08-01 CN CNA2007101383805A patent/CN101159024A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103493071A (en) * | 2011-02-21 | 2014-01-01 | 索尼公司 | Signal processing device, signal processing method, and receiving device |
| CN103493071B (en) * | 2011-02-21 | 2017-07-07 | 索尼公司 | Signal handling equipment, signal processing method and receiving device |
| CN102708338B (en) * | 2011-02-28 | 2015-03-18 | 卡西欧计算机株式会社 | Communication apparatus and method |
| CN102708338A (en) * | 2011-02-28 | 2012-10-03 | 卡西欧计算机株式会社 | Communication apparatus and computer program product |
| CN103188187A (en) * | 2011-12-27 | 2013-07-03 | 博通集成电路（上海）有限公司 | High-linearity ASK modulation method |
| CN103188187B (en) * | 2011-12-27 | 2017-09-12 | 博通集成电路（上海）有限公司 | High-linearity ASK modulation method |
| CN104981822A (en) * | 2013-02-15 | 2015-10-14 | 株式会社理光 | Amplifier circuit, antenna module, and radio communication device |
| CN104981822B (en) * | 2013-02-15 | 2017-09-22 | 株式会社理光 | Amplifier circuit, Anneta module and radio communications set |
| CN105900348B (en) * | 2014-01-13 | 2018-12-14 | 克莱尔瓦扬技术有限公司 | Use the RF system of the PR-ASK with quadrature shift |
| US10230429B2 (en) | 2014-01-13 | 2019-03-12 | Clairvoyant Technology Llc | RF system using PR-ASK with orthogonal offset |
| US10797757B2 (en) | 2014-01-13 | 2020-10-06 | Clairvoyant Technology, Inc. | RF system using AM with orthogonal offset |
| CN106407533A (en) * | 2016-09-06 | 2017-02-15 | 北京深维科技有限公司 | Comprehensive optimization method of register |
| CN106407533B (en) * | 2016-09-06 | 2019-11-29 | 京微齐力(北京)科技有限公司 | A kind of comprehensive optimization method of register |
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Application publication date: 20080409 |