WO2006070507A1 - データ受信装置及びデータ受信方法 - Google Patents
データ受信装置及びデータ受信方法 Download PDFInfo
- Publication number
- WO2006070507A1 WO2006070507A1 PCT/JP2005/015567 JP2005015567W WO2006070507A1 WO 2006070507 A1 WO2006070507 A1 WO 2006070507A1 JP 2005015567 W JP2005015567 W JP 2005015567W WO 2006070507 A1 WO2006070507 A1 WO 2006070507A1
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- signal
- input
- data
- input signal
- circuit
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
- H04L25/085—Arrangements for reducing interference in line transmission systems, e.g. by differential transmission
Definitions
- the present invention relates to a data receiving device that receives a data signal input from another device and a data receiving method thereof.
- FIG. 9A is a diagram showing a basic configuration of a conventional data receiving circuit.
- the data reception circuit 500 includes a signal detection device 501 and a signal reception device 502.
- the signal detection device 501 detects the input of the input signal (DATA), and based on this detection information.
- An activation signal 50A for activating the signal receiving device 502 is output. Based on the activation signal 50A, the signal receiving device 502 is activated, and the signal receiving device 502 starts receiving the input signal (DATA).
- the received input signal (DATA) is output to the internal circuit as output signal 50B.
- FIG. 9B is a timing chart showing the operation of the data receiving circuit 500.
- the amplitude of the input signal has decreased with the increase in data communication speed. It is becoming necessary to determine whether the input signal is a data signal or a noise signal. For this reason, in the signal detection device 501, when the amplitude of the signal is large, the length of the data is detected and the data and the noise are discriminated.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-196464
- Non-Patent Document 1 USB2.0 standard "Universal Serial Bus Specification", [October 14, 2004 search], Internet URL: http://www.usb.Org/developers/docs/usb#20. zip>, after unzipping the zip file "../ USB # 20 / USB # 20.pdf 140 pages
- Non-Patent Document 2 Serial ATA standard, [October 14, 2004 search], Internet URL: http://www.sata-io.Org/docs/PHYii%20Spec%20Rev%201#0%20052604 .pdf> 30-32 pages
- the present invention has been made in view of the strong points, and an object of the present invention is to suppress data loss when receiving an input signal.
- the present invention detects an input of an input signal, determines whether the input signal is a data signal or a noise signal, and determines the input based on the detection information. Reception of the signal is started, and when the input signal is determined to be a data signal, the received input signal is output as a data signal.
- the present invention is a data receiving device including a signal detecting device that detects an input state of an input signal and a signal receiving device that receives the input signal, wherein the signal detecting device includes: And determining means for determining whether the input signal is a data signal or a noise signal, and the signal receiving device receives the input signal in the signal detecting device.
- a receiver circuit that starts receiving the input signal when a force is detected, and the received signal received by the receiver circuit when the input signal is determined to be a data signal by the signal detection device. As a first logic circuit.
- a procedure for detecting an input state of an input signal, a procedure for starting reception of the input signal when the input of the input signal is detected, and the input A procedure for determining whether the signal is a data signal or a noise signal, and a procedure for outputting the received received signal as a data signal when it is determined that the input signal is a data signal.
- FIG. 1 is a diagram showing a configuration of a data receiving apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a diagram illustrating a configuration of a signal detection device according to the first embodiment.
- FIG. 3 is a diagram illustrating a configuration of a filter circuit according to the first embodiment.
- FIG. 4 is a diagram showing a configuration of a first logic circuit according to the first embodiment.
- FIG. 5 is a diagram illustrating a configuration of a signal detection device according to the second embodiment.
- FIG. 6 is a diagram illustrating a configuration of a signal detection device according to the third embodiment.
- FIG. 7 is a truth table of the second logic circuit in the third embodiment.
- FIG. 8 is a diagram illustrating a configuration of a first logic circuit according to the fourth embodiment.
- Fig. 9 is a diagram showing a configuration of a conventional data receiving apparatus
- Fig. 9 (b) is a timing chart diagram showing an operation of the conventional data receiving apparatus. ) Is a timing chart when a signal input detection takes time in the conventional data receiving apparatus.
- FIG. 1 is a diagram showing a configuration of the data receiving apparatus 100 according to Embodiment 1 of the present invention. As shown in FIG. 1, the data receiving device 100 detects the input state of an input signal, while determining whether the input signal is a data signal or a noise signal.
- the signal detection device 101 includes an input terminal IN that inputs a signal, an output terminal Sig # d ect that outputs an activation signal that activates the signal reception device 102 based on detection information of the input signal, and an input signal It has an output terminal Data # detect that outputs the result of determining whether the signal is a data signal or a noise signal.
- the signal receiving device 102 includes the activation signal output from the signal detecting device 101. And a first logic circuit 104 that controls the output of the output signal based on the determination result of whether the input signal is a data signal or a noise signal. I have. The internal configuration of the signal detection device 101 and the first logic circuit 104 will be described later.
- the data receiving apparatus 100 When an input signal is input to the data receiving apparatus 100, the input state is detected by the signal detecting apparatus 101, and an activation signal for starting the signal receiving apparatus 102 is output to the output terminal Sigftdetect force based on this detection information. Is output. Further, the signal detection device 101 determines whether the input signal is a data signal or a noise signal, and outputs the determination result from the output terminal Data # detect.
- the receiver circuit 103 When the activation signal is input to the receiver circuit 103 of the signal receiving apparatus 102, the receiver circuit 103 starts receiving the input signal. Further, the determination result is input to the first logic circuit 104, and the output of the output signal is controlled based on the determination result. Specifically, when it is determined that the input signal is a data signal, the data signal is output as an output signal from the first logic circuit 104, and when the input signal is determined to be a noise signal. The output of the output signal is stopped.
- the input signal is a data signal or a noise signal in the signal detecting device 101 by using the delay time of the receiver circuit 103 and the first logic circuit 104. Make a decision to determine whether or not.
- FIG. 2 is a diagram showing an internal configuration of the signal detection device 101 according to the first embodiment.
- This signal detection device 101 detects a signal input when the amplitude of the input signal input to the input terminal IN is equal to or greater than Vtl, and detects a state in which the input signal is continuously input within a certain period. By doing so, it is discriminated whether it is a data signal or a noise signal.
- the amplitude of the amplitude when the input signal is positive is detected by the first offset comparator circuit 110, while the amplitude of the input signal when the input signal is negative is detected.
- the magnitude is detected by the second offset comparator circuit 111.
- FIG. 3 is a diagram showing a configuration of the first and second filter circuits 113 and 114.
- the first and second filter circuits 113 and 114 include first and second current sources 115 and 116 as current sources, a switch 117, a capacitor 118 as a capacitor, and a capacitor.
- a comparator circuit 119 is provided.
- the switch 117 is turned on by a signal input from the OR circuit 112 to the first and second filter circuits 113 and 114, and the charge of the capacitor 118 is discharged, and the discharged charge amount and the capacitor 118 are discharged.
- the comparator circuit 119 detects a potential that changes according to the capacitance of the capacitor.
- the time constant can be changed by changing the current amount of the second current source 116 or the capacitance of the capacitor 118. Specifically, in the first filter circuit 113, the current amount of the second current source 116 is increased in order to shorten the time until the input detection power of the input signal is output until the detection result is output. The same effect can be obtained by removing the second current source 116 and short-circuiting the terminals between them.
- the force of providing the comparator circuit 119 for comparing the input voltages is not limited to this form, and an inverter circuit, for example, can be used instead.
- FIG. 4 is a diagram showing a configuration of the first logic circuit 104.
- the signal received by the receiver circuit 103 is also input to the delay circuit 140, and the discrimination result power 3 ⁇ 4N terminal indicating whether the input signal is a data signal or a noise signal.
- the AND circuit 141 To the AND circuit 141.
- the delay circuit 140 is controlled so that the received signal is output to the AND circuit 141 after the input timing at which the signal received by the receiver circuit 103 is input is adjusted.
- the delay amount of the delay circuit 140 is increased so that the input timing of the signal received by the receiver circuit 103 is delayed.
- the delay circuit 140 is omitted.
- the delay circuit 140 can use the circuit delay instead of a circuit having other functions such as pattern matching and a circuit for synchronizing an internal clock and a received signal.
- the AND circuit 141 when the input signal is determined to be a data signal based on the determination result output from the signal detection device 101, the data signal received by the receiver circuit 103 is When it is output as an output signal and the input signal is determined to be a noise signal, the output of the output signal is stopped.
- the data receiving apparatus of the first embodiment is described assuming that the received signal is a serial differential signal for data communication in USB 2.0 and Serial ATA.
- the present invention is not limited to this. This also applies to the following second to fourth embodiments.
- FIG. 5 is a diagram illustrating a configuration of the signal detection device 201 in the data reception device according to the second embodiment of the present invention.
- the overall configuration of the data receiving device is the same as that of the first embodiment, and the difference from the first embodiment is only the circuit configuration of the signal detection device 201. Only the different points will be described with reference numerals (the same applies to the third embodiment).
- the amplitude of the amplitude when the input signal is positive is detected by the first offset comparator circuit 110, while the amplitude of the input signal when the input signal is negative is detected.
- the magnitude is detected by the second offset comparator circuit 111.
- the detection results detected by the first and second offset comparator circuits 110 and 111 are input to the OR circuit 112 and filtered by the first filter circuit 113, and then the output signal is the start signal. Are output from the output terminal Sigftdetect and input to the AND circuit 124 and the counter circuit 125.
- the AND circuit 124 receives the filtered signal and the CLK signal, and the output result is input to the counter circuit 125.
- the front Based on the filtered signal and the output result of the AND circuit 124, the time during which an input signal having an amplitude greater than Vtl is input is accurately measured. Based on this measurement result, it is determined whether the input signal is a data signal or a noise signal, and the determination result is output from the output terminal Data # detect.
- FIG. 6 is a diagram illustrating a configuration of the signal detection device 301 in the data reception device according to the third embodiment of the present invention.
- the detection result detected by the first offset comparator circuit 110 is input to the first filter circuit 113 and filtered. This filtered signal is input to the OR circuit 134 and the second logic circuit 135, respectively.
- the detection result detected by the second offset comparator circuit 111 is input to the second filter circuit 114 and filtered.
- the filtered signal is input to the OR circuit 134 and the second logic circuit 135, respectively.
- OR circuit 134 input detection of an input signal is performed based on the signals input from the first and second filter circuits 113 and 114, respectively, and an activation signal is output from an output terminal Sign # detect. Is done.
- the input signal is a data signal or a noise signal based on the signals input from the first and second filter circuits 113 and 114, respectively. Is determined.
- FIG. 7 shows a truth table of the second logic circuit 135.
- input signal detection with a large amplitude at inputs A and B is indicated as H
- an undetected state is indicated as L
- the input signal force 'High' and " When it is not in any state of “Low” (when a signal is input!), It outputs as L.
- FIG. 8 is a diagram showing a configuration of the first logic circuit 204 in the data receiving apparatus according to the fourth embodiment of the present invention. Since the difference from the first embodiment is only the circuit configuration of the first logic circuit 204, the same parts as those of the first embodiment are denoted by the same reference numerals and only the differences will be described below.
- the first logic circuit 204 includes a clock data recovery variable circuit 150 (hereinafter referred to as a CDR circuit) that synchronizes an internal clock and a received signal, and a shift register circuit 151.
- a clock data recovery variable circuit 150 hereinafter referred to as a CDR circuit
- the input signal received by the receiver circuit 103 is input, and the input signal held in the receiver circuit 103 in response to an external CLK signal is input to the shift register circuit 151.
- the shift register circuit 151 when the input signal is a data signal or a noise signal indicating that the input signal is a noise signal 3 ⁇ 4N terminal force is input, and the input signal is determined to be a noise signal When the input signal is determined to be a data signal, the reset is released and the data signal is output as an output signal.
- the first logic circuit 204 adjusts the timing at which the CDR circuit 150 is inserted in order to adjust the timing of the clock and data input to the shift register circuit 151. If there is no need to do this, the CDR circuit 150 can be omitted. Needless to say, the shift register circuit 151 can be replaced by another data storage circuit.
- the method of discriminating data or noise in the signal detecting apparatus 101 is complicated. This is especially useful when time is at a premium.
- the data receiving apparatus provides the first portion of the data signal. Data loss can be minimized, and the input signal is received and the input signal is received and processed in parallel by receiving the input signal and determining whether the input signal is a data signal or a noise signal. Compared to serial processing that determines whether a signal is a data signal or a noise signal, it is extremely useful because it provides a highly practical effect of shortening the time from input to input of the input signal. Industrial applicability is high.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/794,323 US20080001635A1 (en) | 2004-12-28 | 2005-08-26 | Data Receiving Device and Data Receiving Method |
JP2006550601A JPWO2006070507A1 (ja) | 2004-12-28 | 2005-08-26 | データ受信装置及びデータ受信方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-381602 | 2004-12-28 | ||
JP2004381602 | 2004-12-28 |
Publications (1)
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WO2006070507A1 true WO2006070507A1 (ja) | 2006-07-06 |
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ID=36614634
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PCT/JP2005/015567 WO2006070507A1 (ja) | 2004-12-28 | 2005-08-26 | データ受信装置及びデータ受信方法 |
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US (1) | US20080001635A1 (ja) |
JP (1) | JPWO2006070507A1 (ja) |
CN (1) | CN101091365A (ja) |
WO (1) | WO2006070507A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010020292A (ja) * | 2008-06-09 | 2010-01-28 | Semiconductor Energy Lab Co Ltd | 液晶表示装置、および液晶表示装置を具備した電子機器 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5532794B2 (ja) * | 2009-09-28 | 2014-06-25 | 富士電機株式会社 | 同期整流制御装置及び制御方法並びに絶縁型スイッチング電源 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS58101545A (ja) * | 1981-12-12 | 1983-06-16 | Oki Electric Ind Co Ltd | 直列伝送方式 |
JPH10200450A (ja) * | 1997-01-13 | 1998-07-31 | Yokogawa Electric Corp | 中継器 |
JP2003258924A (ja) * | 2002-03-01 | 2003-09-12 | Nec Corp | ジッタ検出回路及びそれを含む受信回路並びに通信システム |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3781674A (en) * | 1971-07-22 | 1973-12-25 | Coulter Electronics | Noise discriminating circuitry and method for electronic particle study apparatus |
US4995058A (en) * | 1987-11-04 | 1991-02-19 | Baker Hughes Inc. | Wireline transmission method and apparatus |
US5912932A (en) * | 1995-04-24 | 1999-06-15 | Lucent Technologies Inc. | Apparatus and methods for decoding a communication signal |
US6559686B1 (en) * | 2000-05-12 | 2003-05-06 | Cypress Semiconductor Corp. | Analog envelope detector |
-
2005
- 2005-08-26 JP JP2006550601A patent/JPWO2006070507A1/ja not_active Withdrawn
- 2005-08-26 US US11/794,323 patent/US20080001635A1/en not_active Abandoned
- 2005-08-26 CN CNA2005800450322A patent/CN101091365A/zh active Pending
- 2005-08-26 WO PCT/JP2005/015567 patent/WO2006070507A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58101545A (ja) * | 1981-12-12 | 1983-06-16 | Oki Electric Ind Co Ltd | 直列伝送方式 |
JPH10200450A (ja) * | 1997-01-13 | 1998-07-31 | Yokogawa Electric Corp | 中継器 |
JP2003258924A (ja) * | 2002-03-01 | 2003-09-12 | Nec Corp | ジッタ検出回路及びそれを含む受信回路並びに通信システム |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010020292A (ja) * | 2008-06-09 | 2010-01-28 | Semiconductor Energy Lab Co Ltd | 液晶表示装置、および液晶表示装置を具備した電子機器 |
US9142179B2 (en) | 2008-06-09 | 2015-09-22 | Semiconductor Energy Laboratory Co., Ltd. | Display device, liquid crystal display device and electronic device including the same |
US9570032B2 (en) | 2008-06-09 | 2017-02-14 | Semiconductor Energy Laboratory Co., Ltd. | Display device, liquid crystal display device and electronic device including the same |
Also Published As
Publication number | Publication date |
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US20080001635A1 (en) | 2008-01-03 |
CN101091365A (zh) | 2007-12-19 |
JPWO2006070507A1 (ja) | 2008-06-12 |
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