WO2005052606A1 - デジタルqp検波装置、該装置を備えたスペクトラムアナライザ、およびデジタルqp検波方法 - Google Patents
デジタルqp検波装置、該装置を備えたスペクトラムアナライザ、およびデジタルqp検波方法 Download PDFInfo
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- WO2005052606A1 WO2005052606A1 PCT/JP2004/017517 JP2004017517W WO2005052606A1 WO 2005052606 A1 WO2005052606 A1 WO 2005052606A1 JP 2004017517 W JP2004017517 W JP 2004017517W WO 2005052606 A1 WO2005052606 A1 WO 2005052606A1
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- digital
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- detection signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
Definitions
- the present invention relates to digital brightening of a detector. Itoda 1
- QP detection quadsi-peak detection section composed of analog circuits.
- QP detection is a detection method determined by the CISPER standard, and is used for EMC measurement.
- the QP detector functions as a charging circuit when the output voltage Vo is higher than the input voltage Vi, and functions as a discharging circuit when the input voltage Vi is higher than the output voltage Vo.
- Patent Document 1 Japanese Unexamined Patent Publication No. Hei 5 _ 1 368 883 discloses a detection circuit provided with an analog circuit element (resistance, capacity) in a detection circuit. ) It is described in.
- an object of the present invention is to digitize a QP detector.
- a digital QP detection apparatus for detecting an input signal and outputting a detection signal, wherein the digital QP detector records an input digital data, and a digital A first multiplier for multiplying the data by a first coefficient and outputting the data; a second multiplier for multiplying the digital data recorded in the register by a second coefficient and outputting the result; An adder for adding the output, a level comparing means for comparing the level of the input signal with the level of the detection signal, and a digital data to be given to the register based on a result of the comparison by the level comparing means.
- a first switch as an output of the second multiplier is provided, and a detection signal is generated based on the output of the first switch.
- a digital QP detector that detects an input signal and outputs a detected signal.
- the input digital data is recorded.
- the first multiplier multiplies the digital data recorded in the register by a first coefficient and outputs the result.
- the second multiplier multiplies the digital data recorded in the register by a second coefficient and outputs the result.
- the adder adds the input signal and the output of the first multiplier.
- the level comparing means compares the level of the input signal with the level of the detection signal.
- the first switch uses the digital data to be given to the register as the output of the adder or the output of the second multiplier based on the comparison result by the level comparing means.
- the digital QP detector configured as described above can be configured to include a third multiplier that generates a detection signal by multiplying the output of the first switch by a third coefficient.
- the third coefficient can be a value obtained by subtracting the first coefficient from 1.
- the first switch is (I) If the level of the input signal is higher than the level of the detection signal, the digital data given to the register is used as the output of the adder. (Ii) If the level of the input signal is lower than the level of the detection signal.
- the signal based on the output of the first switch can be configured as follows: Is recorded every predetermined period. And a second switch for setting the reciprocal of a predetermined period to a data rate of the input signal or a rate smaller than the data rate of the input signal based on a comparison result by the level comparing means.
- the second switch can: (i) If the level of the input signal is higher than the level of the detection signal, determine the reciprocal of a predetermined cycle and (Ii) If the level of the input signal is lower than the level of the detection signal, the reciprocal of the predetermined period is set to a rate smaller than the data rate of the input signal.
- the spectrum analyzer can be configured to include the digital QP detector configured as described above. Further, the spectrum analyzer includes a power signal conversion unit that converts a signal to be measured into a power signal, a digital QP detector configured as described above that detects the power signal and outputs a detection signal, An extreme value detecting means for detecting an extreme value can be provided. According to another aspect of the present invention, there is provided a digital QP detection method for detecting an input signal and outputting a detection signal, wherein: a recording step of recording the input digital data; and a recording step in the recording step.
- the detection signal is configured to be generated.
- FIG. 1 is a block diagram showing a configuration of a spectrum analyzer 1 having a QP detector 20 according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing the configuration of the QP detector 20.
- FIG. 3 is a diagram showing a waveform of the power signal Vi and a waveform of the detection signal Vo.
- FIG. 4 is a diagram partially showing the configuration of the QP detector 20 for explaining the operation of the QP detector 20 from time t0 to t1.
- FIG. 5 is a diagram showing waveforms of a power signal Vi and a detection signal Vo for explaining the operation of the QP detector 20 from time t0 to time t1.
- FIG. 6 is a diagram partially showing the configuration of QP detector 20 for explaining the operation of QP detector 20 after time t1.
- FIG. 7 is a diagram showing the waveforms of the power signal Vi and the detection signal Vo for explaining the operation of the QP detector 20 after time t1.
- FIG. 1 is a block diagram showing a configuration of a spectrum analyzer 1 including a QP detector 20 according to an embodiment of the present invention.
- the spectrum analyzer 1 includes a power signal converter 10, a QP detector 20, a peak detector (extreme value detection means) 30, and a display 40.
- the power signal converter 10 converts the signal to be measured into a power signal and outputs it.
- the power signal output section 10 is composed of athens (attenuator) 102, oscillator 104, mixer 106, A / D converter 108, oscillator 110, 90-degree phase converter 1 1 1, mixer 1 1 2 I, 1 1 2 Q, mouth-to-pass fill 1 Athens Attenuator (Attenuator) 102, which has a power converter and a power converter, attenuates the level of the signal under measurement.
- the oscillator 104 outputs a signal having a predetermined local frequency.
- Mixer 106 mixes the signal output from Athens Attenuator (attenuator) 102 with the local frequency signal output from oscillator 104 to output an IF (intermediate frequency) signal .
- the 8/0 converter 108 converts an IF signal, which is an analog signal, into a digital signal.
- the oscillator 110 outputs a signal having a predetermined orthogonal conversion frequency.
- the 90-degree phase converter 111 shifts the phase of the signal of the orthogonal transform frequency output from the oscillator 110 by 90 degrees and outputs the shifted signal.
- the mixer 112I mixes the output of the AZD converter 108 with the signal of the orthogonal transform frequency output from the oscillator 110, and outputs the mixed signal.
- Mixer 112Q mixes the output of A / D converter 108 and the signal output from 90 degree phase converter 111 to output.
- the orthogonal transformation is performed by the mixers 112 I and 112 Q.
- the high-frequency component of the output of the mixer 1 12 I is cut by the low-pass filter 114 I, and the high-frequency component of the output of the mixer 112 Q is cut by the 1-pass filter 114 Provided to the switching section 1 16.
- the power converter 1 16 receives the I signal from the low-pass filter 114 I and the Q signal from the low-pass filter 114 Q, calculates I signal 2 + Q signal 2, and calculates the power of the signal to be measured. Ask for.
- the power converter 1 16 outputs the obtained power as a power signal Vi.
- the QP detector 20 detects the power signal Vi output from the power signal converter 10 and outputs a detection signal Vo.
- FIG. 2 is a block diagram showing a configuration of the QP detector 20.
- the QP detector 20 includes a comparator (level comparing means) 202, a first switch 204, a second switch 206, an adder 208, It has a register 210, a first multiplier 212, a second multiplier 214, a third multiplier 216, a frequency divider 218, and a latch 220.
- the comparator (level comparing means) 202 compares the level (voltage) of the power signal Vi with the level (voltage) of the detection signal Vo. The comparison result is transmitted to the first switch 204 and the second switch 206.
- the waveform of the power signal Vi is a sawtooth waveform. That is, at time t O, the level instantaneously increases from VI to V2. Thereafter, it decreases linearly to VI until time t2. After that, keep level VI. At this time, the level (voltage) of the detection signal Vo increases linearly from time t0 to t1 (where t1 ⁇ t2), and reaches a level V3. . After the time t1, the level (voltage) of the detection signal Vo decreases after maintaining a constant value for a certain period of time (N / fs, where fs is the input data rate [Hz]). Repeat the movement of keeping the value.
- the first switch 204 has terminals 204a, 204b, and 204c.
- Terminal 204a is connected to the output side of adder 208.
- the terminal 204b is connected to the output side of the second multiplier 214.
- Terminal 204c is Connected to the input side of register 210 and the input side of the second multiplier 216.
- the first switch 204 connects the terminal 204a to the terminal 204c.
- the second switch 206 has terminals 206a ⁇ 206b and 206c.
- Terminal 206a is a terminal that outputs a signal at the input data rate (the sampling frequency of the power signal Vi).
- Terminal 206 b is connected to frequency divider 218.
- Terminal 206c is connected to latch 220. The second switch 206 connects the terminal 206 a to the terminal 206 c when the power signal Vi is larger than the detection signal Vo.
- the clock frequency given to the latch 220 becomes the input data rate. If the power signal Vi is less than the detection signal Vo, connect the terminals 206b and 206c. Thus, the clock frequency given to the latch 220 is [input data rate] / N.
- the adder 208 adds the power signal Vi and the output of the first multiplier 212 and outputs the result.
- Register 210 records the input digital data.
- the first multiplier 2 12 receives the digital data recorded in the register 210. Is read out and multiplied by the first coefficient (gainl) and output.
- the second multiplier 2 14 reads out the digital data recorded in the register 210 and multiplies it by a second coefficient (gain2) and outputs the result.
- the third multiplier 216 multiplies the signal output from the terminal 204 c of the first switch 204 by a third coefficient and outputs the result.
- the 1st coefficient is 1-gainl.
- the output of the third multiplier 2 16 is recorded in the latch 220 and is further output from the latch 220 to become the detection signal Vo.
- the frequency divider 2 18 outputs the signal of the input data rate to the terminal 206 b with a frequency of 1 ZN (N is, for example, 100).
- the latch 220 receives the signal output from the terminal 204c of the first switch 204 via the third multiplier 216 and records it.
- the recorded signal is updated at every predetermined cycle which is the reciprocal of the given clock frequency.
- the recorded signal is output and becomes a detection signal Vo.
- the peak detector 30 detects the peak (maximum value) of the detection signal output from the QP detector 20.
- the display 40 displays the peak detected by the peak detector 30 as a graph or the like.
- the signal to be measured is provided to the power signal converter 1o. After the level of the signal to be measured is attenuated by Athens 102, the signal is mixed by the mixer 106 with the local frequency signal output by the oscillator 104 to become an IF signal. The IF signal is converted to a digital signal by the A / D converter 108.
- the output of the A / D converter 108 is mixed with the signal of the orthogonal transform frequency by the mixer 112I, and the high-frequency component is cut by the one-pass filter 114I to become an I signal.
- the output of the A / D converter 108 is mixed with the signal output from the 90-degree phase converter 111 by the mixer 112Q, and the high-frequency component is mixed by the mouth-pass filter 114Q. It is cut and becomes the Q signal.
- the power converter 1 16 calculates the signal 2 + Q signal 2 to determine the power of the signal to be measured.
- the power converter 1 16 outputs the obtained power as a power signal Vi.
- the power signal Vi has a sawtooth waveform as shown in FIG.
- FIG. 4 is a diagram partially showing the configuration of QP detector 20 for explaining the operation of QP detector 20 from time t0 to t1.
- FIG. 5 is a diagram showing waveforms of the power signal Vi and the detection signal Vo, and shows the waveform from time t0 to t1 by a solid line.
- the comparator 202 compares the level (voltage) of the power signal Vi with the level (voltage) of the detection signal Vo. Referring to FIG. 5, at time t0, power signal Vi is at level (voltage) V2, and detection signal Vo is at level (voltage). Pressure) VI.
- the result of this comparison is sent to the first switch 204 and the second switch 206.
- the first switch 204 connects the terminal 204a to the terminal 204c.
- the digital data input to the register 210 is read out by the first multiplier 212 and multiplied by the first coefficient (gainl).
- the output of the first multiplier 211 is added to the power signal Vi by the adder 208.
- the output of the adder 208 is given to the register 210.
- the digital data supplied to the register 210 is multiplied by a third coefficient (1-gainl) by the third multiplier 216 and recorded in the latch 220.
- the second switch 206 connects the terminal 206a to the terminal 206c. Therefore, the clock frequency given to the latch 220 becomes the input data rate.
- the digital data recorded in the latch 220 is output as a detection signal Vo.
- data recorded in latch 220 is a kind of positive feedback circuit (register 210, first multiplier 212, and adder 208). (See Fig. 4), the level increases linearly. That is, the operation as a charging circuit is performed.
- the power signal Vi has a sawtooth waveform, and its level decreases linearly. Until the time t1, [power signal Vi]> [detection signal Vo], the above operation continues. Next, the operation of QP detector 20 after time t1 will be described.
- FIG. 6 is a diagram partially illustrating the configuration of QP detector 20 for explaining the operation of QP detector 20 after time t1.
- FIG. 7 is a diagram showing the waveforms of the power signal Vi and the detection signal Vo, and shows the waveform after time t1 by a solid line.
- the comparator 202 compares the level (voltage) of the power signal Vi with the level (voltage) of the detection signal Vo. Referring to FIG. 7, at time t1, power signal Vi is at level (voltage) V3, and detection signal Vo is at level (voltage) V3. Therefore, at a point in time when the time t1 is slightly exceeded, [power signal Vi] is equal to [detection signal Vo]. The result of this comparison is sent to the first switch 204 and the second switch 206.
- the first switch 204 connects the terminal 204 b to the terminal 204 c. Then, referring to FIG. 6, the digital data input to the register 210 is read out by the second multiplier 214 and multiplied by the second coefficient (gain2). The output of the second multiplier 214 is given to the register 210. Further, the digital data given to the register 210 is multiplied by a third coefficient (1-gainl) by a third multiplier 216, and is recorded in the latch 220. The second switch 206 connects the terminal 206 b to the terminal 206 c. Therefore, the clock frequency given to the latch 220 is [input data rate] ZN. The digital data recorded in the latch 220 is output as a detection signal Vo. Referring to FIG.
- the data recorded in the latch 220 corresponds to the output of a kind of discharge circuit composed of the register 210 and the second multiplier 214. See figure), the level is decreasing. However, since the data recorded in the latch 222 is updated every time N / [input data rate], a constant value is set for a fixed time (NZ fs, where fs: input data rate) Hz]), then decrease, and then keep a constant value for a certain period of time. And approach level VI. On the other hand, since the power signal Vi has a saw-tooth waveform, the level decreases linearly. Therefore, after the time t1, the power signal Vi is equal to the detected signal Vo, and the above operation is continued.
- the clock frequency given to the latch 220 is set to [input data rate] (N) and is smaller than the input data rate because the second multiplier 2 when the input data rate is changed. This is because the number of bits handled by the second multiplier 21 1 is reduced by increasing the amount of change of the second coefficient (gain2) in 14.
- fs Input data rate [Hz]
- T1 charge time constant [sec]
- T2 discharge time constant [sec].
- the second coefficient (gain2) is the data rate; when fs is changed from 2.4 MHz to 24 kHz, the fourth decimal place is the same 9 but the fifth decimal place is the same. Differs from the value. Therefore, in response to changing the data rate fs from 2.4 MHz to 24 kHz, the second The coefficient (gain2) should be such that the second multiplier 2 14 can handle the fifth to sixth decimal places. Therefore, the number of bits handled by the second multiplier 2 14 can be reduced.
- the peak (maximum value) of the detection signal Vo output from the QP detector 20 is detected by the peak detector 30.
- the display 40 displays the peak detected by the peak detector 30 as a graph or the like.
- the level of the power signal Vi and the level of the detection signal Vo are compared by the comparator 202.
- the first switch 204 connects the terminal 204a to the terminal 204c.
- a kind of positive feedback circuit is constituted by the register 210, the first multiplier 212 and the adder 208. Therefore, the operation as a charging circuit is performed. If the level of the power signal Vi is lower than the level of the detection signal Vo, the first switch 204 connects the terminal 204 b to the terminal 204 c.
- a kind of discharge circuit is constituted by the resistor 210 and the second multiplier 214. Therefore, an operation as a discharge circuit is performed.
- the function as a charging circuit [power signal Vi level]> [the level of the detection signal Vo]) and the function as a discharging circuit ([Power signal Vi level] ⁇ [detection signal Vo level])
- QP detection can be performed.
- the comparator 202, the adder 208, the register 210, the first multiplier 212 and the second multiplier 214 are digital circuit elements. Since it is a detector, the digitization of the QP detector can be achieved.
- the level of the power signal Vi and the level of the detection signal Vo are compared by the comparator 202.
- the second switch 206 connects the terminal 206 a to the terminal 206 c.
- the clock frequency applied to the latch 220 becomes the input data rate fs.
- the second switch 206 connects the terminal 206 b to the terminal 206 c.
- the QP detector 20 functions as a discharge circuit
- the clock frequency given to the latch 220 becomes smaller than the input data rate fs.
- the amount of change in the second coefficient (gain2) in the second multiplier 214 can be increased. Therefore, the number of bits handled by the second multiplier 2 14 can be reduced.
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- Measurement Of Current Or Voltage (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005515800A JP4644128B2 (ja) | 2003-11-28 | 2004-11-18 | デジタルqp検波装置、該装置を備えたスペクトラムアナライザ、およびデジタルqp検波方法 |
DE112004002262T DE112004002262T5 (de) | 2003-11-28 | 2004-11-18 | Digitale QP Detektionsvorrichtung, Spektrumanalysator aufweisend dieselbe und ein Verfahren zur digitalen QP Detektierung |
US10/596,056 US7633319B2 (en) | 2003-11-28 | 2004-11-18 | Digital QP detecting apparatus, spectrum analyzer having the same, and digital QP detecting method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003399189 | 2003-11-28 | ||
JP2003-399189 | 2003-11-28 |
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WO2005052606A1 true WO2005052606A1 (ja) | 2005-06-09 |
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PCT/JP2004/017517 WO2005052606A1 (ja) | 2003-11-28 | 2004-11-18 | デジタルqp検波装置、該装置を備えたスペクトラムアナライザ、およびデジタルqp検波方法 |
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US (1) | US7633319B2 (ja) |
JP (1) | JP4644128B2 (ja) |
DE (1) | DE112004002262T5 (ja) |
WO (1) | WO2005052606A1 (ja) |
Cited By (1)
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CN111487476A (zh) * | 2020-05-06 | 2020-08-04 | 深圳市鼎阳科技股份有限公司 | 一种准峰值检波方法和准峰值检波器 |
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US7659708B2 (en) * | 2005-08-24 | 2010-02-09 | Nucomm, Inc. | Broadcast receiver having integrated spectrum analysis |
US20090117872A1 (en) * | 2007-11-05 | 2009-05-07 | Jorgenson Joel A | Passively powered element with multiple energy harvesting and communication channels |
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US11901157B2 (en) | 2020-11-16 | 2024-02-13 | Applied Materials, Inc. | Apparatus and methods for controlling ion energy distribution |
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US11948780B2 (en) | 2021-05-12 | 2024-04-02 | Applied Materials, Inc. | Automatic electrostatic chuck bias compensation during plasma processing |
US11791138B2 (en) | 2021-05-12 | 2023-10-17 | Applied Materials, Inc. | Automatic electrostatic chuck bias compensation during plasma processing |
US11967483B2 (en) | 2021-06-02 | 2024-04-23 | Applied Materials, Inc. | Plasma excitation with ion energy control |
US20220399185A1 (en) | 2021-06-09 | 2022-12-15 | Applied Materials, Inc. | Plasma chamber and chamber component cleaning methods |
US11810760B2 (en) | 2021-06-16 | 2023-11-07 | Applied Materials, Inc. | Apparatus and method of ion current compensation |
US11569066B2 (en) | 2021-06-23 | 2023-01-31 | Applied Materials, Inc. | Pulsed voltage source for plasma processing applications |
US11476090B1 (en) | 2021-08-24 | 2022-10-18 | Applied Materials, Inc. | Voltage pulse time-domain multiplexing |
US12106938B2 (en) | 2021-09-14 | 2024-10-01 | Applied Materials, Inc. | Distortion current mitigation in a radio frequency plasma processing chamber |
US11694876B2 (en) | 2021-12-08 | 2023-07-04 | Applied Materials, Inc. | Apparatus and method for delivering a plurality of waveform signals during plasma processing |
US11972924B2 (en) | 2022-06-08 | 2024-04-30 | Applied Materials, Inc. | Pulsed voltage source for plasma processing applications |
US12111341B2 (en) | 2022-10-05 | 2024-10-08 | Applied Materials, Inc. | In-situ electric field detection method and apparatus |
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JPH04118564A (ja) * | 1990-09-10 | 1992-04-20 | Advantest Corp | 妨害波測定器 |
IT1245507B (it) | 1991-02-15 | 1994-09-29 | Sgs Thomson Microelectronics | Circuito per la rilevazione dell'attraversamento di zero di una tensione analogica alternata |
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2004
- 2004-11-18 WO PCT/JP2004/017517 patent/WO2005052606A1/ja active Application Filing
- 2004-11-18 US US10/596,056 patent/US7633319B2/en not_active Expired - Fee Related
- 2004-11-18 DE DE112004002262T patent/DE112004002262T5/de not_active Withdrawn
- 2004-11-18 JP JP2005515800A patent/JP4644128B2/ja not_active Expired - Fee Related
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JPH02183170A (ja) * | 1989-01-10 | 1990-07-17 | Anritsu Corp | スペクトラムアナライザ |
JP2002350474A (ja) * | 2001-01-26 | 2002-12-04 | Rohde & Schwarz Gmbh & Co Kg | 準尖頭値検出器 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN111487476A (zh) * | 2020-05-06 | 2020-08-04 | 深圳市鼎阳科技股份有限公司 | 一种准峰值检波方法和准峰值检波器 |
Also Published As
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US20070173217A1 (en) | 2007-07-26 |
US7633319B2 (en) | 2009-12-15 |
JPWO2005052606A1 (ja) | 2007-06-21 |
JP4644128B2 (ja) | 2011-03-02 |
DE112004002262T5 (de) | 2006-10-26 |
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