WO2009067037A1 - Dispositif de transmission discrète de signaux électriques - Google Patents
Dispositif de transmission discrète de signaux électriques Download PDFInfo
- Publication number
- WO2009067037A1 WO2009067037A1 PCT/RU2007/000495 RU2007000495W WO2009067037A1 WO 2009067037 A1 WO2009067037 A1 WO 2009067037A1 RU 2007000495 W RU2007000495 W RU 2007000495W WO 2009067037 A1 WO2009067037 A1 WO 2009067037A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wire
- communication line
- signal
- transmitter
- line
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/50—Systems for transmission between fixed stations via two-conductor transmission lines
-
- 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
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/028—Arrangements specific to the transmitter end
- H04L25/0282—Provision for current-mode coupling
-
- 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
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/0292—Arrangements specific to the receiver end
- H04L25/0294—Provision for current-mode coupling
Definitions
- the invention relates to methods for transmitting information, namely, to communication interfaces of electronic devices, in particular, to methods for transmitting discrete electrical signals.
- the method is known as the RS-232 interface.
- the disadvantage of this method is the low noise immunity and the short connection length, usually not more than 10 m. This is due to different conditions of the current flow in the line wires: the resistance in the chain of transmission wires is higher than the resistance in the circuit of the common wire (earth), which contributes to the appearance of interference voltage when exposed to electromagnetic fields.
- the method allows information to be transmitted to only one receiver and requires the organization of its independent bipolar electrical power, which leads to an increase in the cost of equipment.
- a method of transmitting discrete electrical signals in binary code from a transmitter to a receiver located on a three-wire communication line with a line voltage source combined with a transmitter including transmitting a logical unit by simultaneously setting a negative voltage on one wire and a positive voltage on the other wire relative to the third , transferring logical zero by setting a voltage close to zero on the first and second wires relative to the third, and reading The receiver of the voltage value in the first and second wires of the line.
- the method is known as the RS-485 interface.
- the method has a higher noise immunity and a longer communication length - up to 1000 m, allows connecting a large number of devices and therefore provides signal transmission in both directions, however, like the previous method, it requires the organization of an independent bipolar electric power supply for all devices connected to lines, which significantly increases the cost of the method.
- separate power supply of devices and a large communication length lead to a mismatch in the potentials of their zero bus (ground), which can lead to the failure of devices.
- galvanic isolation of devices with a line is used, which leads to an additional increase in the cost of the method of transmitting information.
- a known method of transmitting discrete electrical signals from a transmitter to a receiver located on a two-wire communication line with a power supply source, wherein the first pole of the source and the first wire of the communication line are earthed, and the second wire of the communication line is connected to the second pole of the source through a resistor, includes transmitting a logical signal to binary code by closing the line with the transmitter using an electric key and the receiver reading the voltage value in the wire relative to the ground.
- the voltage level in the line below the first specified threshold is usually considered a logical zero, and more than the second specified threshold is a logical unit.
- 0.8 V and 1.2 V corresponding to logical TTL levels are selected for such thresholds.
- many other well-known interfaces are arranged.
- the known method makes it possible to interconnect a large number of devices and provides signal transmission in both directions via two wires, allows power supply of devices from the line, which makes the method cheaper.
- a disadvantage of the known method for transmitting discrete electrical signals is its low noise immunity. When exposed to interference, although this effect is the same for both wires of the communication line, the result of the exposure is different, since the propagation conditions of the interference in the grounded and ungrounded wires of the line are different, and more specifically, the resistances for the flow of interference current in each wire are different from the point of impact to the pole of the power supply or ground. As a result, at the point of interference, as well as in the remaining sections of the line, a potential difference occurs, i.e. interference voltage, which prevents the correct transmission of the useful signal.
- Disclosure of invention The basis of the present invention is the task of improving noise immunity both in the transmission and reception of electrical signals in the communication line while reducing the cost of the process of information transfer.
- the problem is solved in that in the method of transmitting discrete electrical signals from the transmitter to the receiver, connected to a two-wire communication line with a power supply source, the readout signal as a logical zero and one is determined by the signal level in the communication line relative to the set thresholds, the first pole the power supply voltage is connected to the first wire of the two-wire communication line through the first resistor, and the second pole of the power supply voltage is connected to the second wire of the two-wire line with link through the second resistor, the first and second resistors having equal resistance values, the receiver is connected to a two-wire communication line between the transmitter and the power supply source, and also equipped with two current sensors installed one in each wire of the two-wire communication line, the signal is transmitted by changing current in a two-wire communication line by the transmitter by changing its output resistance and measuring the current value by two sensors, while the readout signal is determined as the sum of salute values of the measured currents.
- the invention consists in the following.
- the propagation conditions of the signals are the same in both wires of the two-wire communication line, since for each wire of the line the resistance between the point of the interference and the corresponding pole of the power supply is the same due to the presence of resistors of equal magnitude.
- the common-mode interference signal is compensated for the entire length of the communication line, the voltage in the line in the zone of being The transmitter does not contain an interference signal and does not distort the transmitter signal.
- the level of the interference signal in the line decreases by a factor of a thousand, allowing communication even in conditions in which, when using the prototype method, the interference voltage would far exceed the useful signal.
- two current sensors are introduced in the present invention, one for each wire.
- the values of the noise currents in the wires of the communication line have opposite signs, and when using two equal resistors to compensate for the voltage of the noise in the line, they are equal. Therefore, if we add both measured current values taking into account the sign, then the part of the currents associated with the interference will be mutually destroyed, and the part of the currents associated with the useful signal will double. If you add the absolute values of the two currents, the result will be the same. Thus, in order to measure the useful signal and separate it from the interference signal, it is necessary to calculate the sum of the absolute values of the readings of the two current sensors.
- the essence of the method for transmitting discrete electrical signals from a transmitter to a receiver via a two-wire communication line which provides compensation for an interference signal both during transmission and reception of signals transmitted over long distances, is illustrated by a non-limiting example of its implementation.
- the wires of the two-wire communication line made in the form of the so-called “twisted pair” are connected to the poles of the power supply through the same IKOM limiting resistors.
- a receiver and a transmitter are connected to the line wires, the receiver being connected between the transmitter and the power source.
- the transmitter is a microprocessor with an output stage in the form of a key controlled by the microprocessor, connected in parallel to the communication line, and having a limiting resistor to provide a given amount of current in the line during transmission. It is possible to limit the transmission current using a controlled current stabilizer.
- the receiver is equipped with a microprocessor and two current sensors installed one in each wire of the communication line and included one as a leakage current sensor and the other as an incoming current sensor.
- the outputs of the current sensors are connected to the inputs of the adder, with which add the absolute values of the signals from the sensors, while the output of the adder is connected to the read input of the microprocessor.
- the normal state of the line corresponds to the transfer of a logical unit, while the voltage in the line is close to the voltage of the power source, which allows the transmitter and other devices connected to the line to be powered. In this case, the current in the line (current consumption of connected devices) does not exceed a predetermined threshold. Logical Zero is formed for a short time, by creating additional current in the line due to the closure of the line by the transmitter through the limiting resistor.
- the wires of the line are placed in an electromagnetic field that creates interference, or the common-mode noise voltage is supplied from the generator to both wires of the line. Measure the interference voltage between the wires of the line near the receiver and transmitter. As a result of compensation, the interference voltage between the wires of the communication line is thousands of times less than the common-mode noise voltage supplied from the generator. To simulate the propagation conditions of noise in the prototype (for comparison), one of the resistors is closed, the signal at the output of the adder is significantly distorted. Similarly, to illustrate the compensation of interference by installing two current sensors, one of the sensors is closed, and the signal at the output of the adder is also distorted.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Dc Digital Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Near-Field Transmission Systems (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/RU2007/000495 WO2009067037A1 (fr) | 2007-09-12 | 2007-09-12 | Dispositif de transmission discrète de signaux électriques |
EP07870620.7A EP2200186B1 (en) | 2007-09-12 | 2007-09-12 | Method for transmitting discrete electric signals |
US12/674,557 US8446977B2 (en) | 2007-09-12 | 2007-09-12 | Method for transmitting discrete electric signals |
CN200780100603.7A CN101855840B (zh) | 2007-09-12 | 2007-09-12 | 用于传输离散电信号的方法 |
KR1020107007779A KR101171509B1 (ko) | 2007-09-12 | 2007-09-12 | 이산적 전기 신호들을 송신하기 위한 방법 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/RU2007/000495 WO2009067037A1 (fr) | 2007-09-12 | 2007-09-12 | Dispositif de transmission discrète de signaux électriques |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009067037A1 true WO2009067037A1 (fr) | 2009-05-28 |
Family
ID=40667711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2007/000495 WO2009067037A1 (fr) | 2007-09-12 | 2007-09-12 | Dispositif de transmission discrète de signaux électriques |
Country Status (5)
Country | Link |
---|---|
US (1) | US8446977B2 (ru) |
EP (1) | EP2200186B1 (ru) |
KR (1) | KR101171509B1 (ru) |
CN (1) | CN101855840B (ru) |
WO (1) | WO2009067037A1 (ru) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011105921A1 (ru) | 2010-02-24 | 2011-09-01 | Ovchinnikov Valery Vasilievich | Способ передачи дискретных электрических сигналов |
CN104584498A (zh) * | 2012-08-24 | 2015-04-29 | 恩德斯+豪斯流量技术股份有限公司 | 用于信号传输和用于电流隔离的电路 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5369010B2 (ja) * | 2010-01-25 | 2013-12-18 | パナソニック株式会社 | 通信システム |
RU2667221C2 (ru) * | 2011-10-24 | 2018-09-17 | Валерий Васильевич Овчинников | Источник питания двухпроводной линии связи |
DE102012200020B4 (de) * | 2012-01-02 | 2024-05-23 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Übertragung mindestens einer vorbestimmten Signalform an eine räumlich abgesetzte Sendeeinrichtung |
CN102759915B (zh) * | 2012-07-19 | 2014-05-07 | 山东康威通信技术股份有限公司 | 一种电力隧道应急通信人员定位装置 |
US10756857B2 (en) * | 2013-01-25 | 2020-08-25 | Infineon Technologies Ag | Method, apparatus and computer program for digital transmission of messages |
EP2866354B1 (en) * | 2013-10-25 | 2019-06-26 | VITO NV (Vlaamse Instelling voor Technologisch Onderzoek NV) | Method and system for providing pulsed power and data on a bus |
US9571155B2 (en) * | 2014-08-25 | 2017-02-14 | Samsung Display Co., Ltd. | Method of startup sequence for a panel interface |
MD1011Z (ru) * | 2015-06-18 | 2016-09-30 | ИНСТИТУТ ЭЛЕКТРОННОЙ ИНЖЕНЕРИИ И НАНОТЕХНОЛОГИЙ "D. Ghitu" АНМ | Способ передачи трех сигналов по четырехпроводной линии связи |
US9602317B1 (en) * | 2015-10-12 | 2017-03-21 | Qualcomm Incorporated | Apparatus and method for combining currents from passive equalizer in sense amplifier |
US9544864B1 (en) * | 2016-03-07 | 2017-01-10 | Panasonic Liquid Crystal Display Co., Ltd. | Data transmission system and receiving device |
RU2642845C1 (ru) * | 2017-03-31 | 2018-01-29 | Дмитрий Витальевич Федосов | Способ и система мобильной связи для протяженных объектов |
TWI737529B (zh) * | 2020-10-30 | 2021-08-21 | 精拓科技股份有限公司 | 數位隔離器 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5317597A (en) * | 1989-08-16 | 1994-05-31 | U.S. Philips Corporation | Resistance coupled data transmission arrangement |
RU2050039C1 (ru) * | 1990-08-16 | 1995-12-10 | Василий Николаевич Орищенко | Устройство для передачи и приема дискретной информации по двухпроводной линии |
RU2247469C2 (ru) * | 2002-09-23 | 2005-02-27 | Овчинников Валерий Васильевич | Способ передачи дискретных электических сигналов |
RU2259633C2 (ru) * | 2002-09-23 | 2005-08-27 | Овчинников Валерий Васильевич | Способ передачи дискретных электрических сигналов |
Family Cites Families (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4841722B1 (ru) * | 1969-06-13 | 1973-12-08 | ||
GB1424525A (en) * | 1972-05-11 | 1976-02-11 | Elliott Brothers London Ltd | Data transmission system |
GB1448099A (en) * | 1973-12-13 | 1976-09-02 | Ibm | Digital signal transmission system for minimising the effects of reflections |
NL7704703A (nl) * | 1977-04-29 | 1978-10-31 | Philips Nv | Electronische gelijkstroomtelegrafiezender. |
US4486852A (en) * | 1978-06-05 | 1984-12-04 | Fmc Corporation | Synchronous time-shared data bus system |
NL191374C (nl) * | 1980-04-23 | 1995-06-16 | Philips Nv | Communicatiesysteem met een communicatiebus. |
CA1174302A (en) * | 1982-02-24 | 1984-09-11 | Philip R. Staal | Low power digital bus |
SU1255003A1 (ru) | 1984-11-30 | 1996-06-10 | Научно-производственное объединение по созданию и выпуску средств автоматизации горных машин | Устройство для передачи и приема информации по двухпроводной линии связи |
US4719458A (en) * | 1986-02-24 | 1988-01-12 | Chrysler Motors Corporation | Method of data arbitration and collision detection in a data bus |
IN170265B (ru) * | 1986-10-02 | 1992-03-07 | Rosemount Inc | |
DE3776782D1 (de) * | 1986-12-12 | 1992-03-26 | Siemens Nixdorf Inf Syst | Sende-empfangs-einrichtung fuer ein busleitungssystem. |
US4808855A (en) * | 1987-12-16 | 1989-02-28 | Intel Corporation | Distributed precharge wire-or bus |
US4994690A (en) * | 1990-01-29 | 1991-02-19 | Motorola, Inc. | Split level bus |
TW198778B (ru) * | 1991-04-29 | 1993-01-21 | Philips Nv | |
DK173291D0 (da) * | 1991-10-14 | 1991-10-14 | Ole Cramer Nielsen | Datakommunikationssystem af feltbus-type, med et tolederkabel til baade stroemforsyning af tilsluttede enheder og dataoverfoering mellem disse |
DE4205241C2 (de) * | 1992-02-21 | 1997-12-18 | Itt Ind Gmbh Deutsche | Potentialfreie Datenübertragungseinrichtung |
US5749984A (en) * | 1995-12-29 | 1998-05-12 | Michelin Recherche Et Technique S.A. | Tire monitoring system and method |
US5729547A (en) * | 1996-02-07 | 1998-03-17 | Dutec, Inc. | Automatic driver/receiver control for half-duplex serial networks |
JP2000510632A (ja) * | 1997-11-19 | 2000-08-15 | メニコ アクチエンゲゼルシヤフト | データ・制御バス |
US6185263B1 (en) * | 1998-11-09 | 2001-02-06 | Broadcom Corporation | Adaptively configurable class-A/class-B transmit DAC for transceiver emission and power consumption control |
DE19900869C2 (de) * | 1999-01-12 | 2000-11-30 | Ic Haus Gmbh | Steuer- und Datenübertragungsanlage |
US6553076B1 (en) * | 1999-03-15 | 2003-04-22 | Actpro International Limited | Mixed mode transceiver digital control network and collision-free communication method |
US6694439B2 (en) * | 2000-06-07 | 2004-02-17 | Adaptive Instruments Corporation | Apparatus for providing communications data over a power bus having a total current that is the absolute value of the most negative current excursion during communication |
EP1202145B1 (en) * | 2000-10-27 | 2005-02-09 | Invensys Systems, Inc. | Field device with a transmitter and/ or receiver for wireless data communication |
US6877054B2 (en) * | 2001-07-16 | 2005-04-05 | Rambus Inc. | Method and apparatus for position dependent data scheduling |
US7366115B2 (en) * | 2001-12-13 | 2008-04-29 | Ami Semiconductor Belgium Bvba | Multiplex transmission system with in-circuit addressing |
GB0222680D0 (en) * | 2002-10-01 | 2002-11-06 | Haswell Moulding Technologies | Power generation |
US6839210B2 (en) * | 2002-10-25 | 2005-01-04 | Schweitzer Engineering Laboratories, Inc. | Bus total overcurrent system for a protective relay |
US6906618B2 (en) * | 2003-06-26 | 2005-06-14 | Abet Technologies, Llc | Method and system for bidirectional data and power transmission |
US6988449B2 (en) * | 2003-07-15 | 2006-01-24 | Special Devices, Inc. | Dynamic baselining in current modulation-based communication |
US7191269B2 (en) * | 2003-07-30 | 2007-03-13 | Delphi Technologies, Inc. | Method for multiple sensors to communicate on a uni-directional bus |
US7280048B2 (en) * | 2003-08-07 | 2007-10-09 | Rosemount Inc. | Process control loop current verification |
WO2005032060A1 (en) * | 2003-09-26 | 2005-04-07 | Hubbell Limited | Circuit for automatic termination of a bus network |
US6927599B2 (en) * | 2003-11-24 | 2005-08-09 | Fairchild Semiconductor Corporation | Failsafe for differential circuit based on current sense scheme |
US7274916B2 (en) * | 2004-07-23 | 2007-09-25 | Texas Instruments Incorporated | Differential signal receiver and method |
US7444427B2 (en) * | 2004-07-30 | 2008-10-28 | Fisher-Rosemount Systems, Inc. | System and method for preventing transmission during message reception |
US7331010B2 (en) * | 2004-10-29 | 2008-02-12 | International Business Machines Corporation | System, method and storage medium for providing fault detection and correction in a memory subsystem |
DE102004059958B4 (de) * | 2004-12-13 | 2007-10-04 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zum Bestimmen eines Korrelationswertes |
US7343787B2 (en) * | 2005-05-19 | 2008-03-18 | Oguzhan Oflaz | Piezoelectric tire sensor and method |
US8063694B2 (en) * | 2006-04-28 | 2011-11-22 | Micro Motion, Inc. | Bus loop power interface and method |
MX2011000784A (es) * | 2008-07-31 | 2011-03-02 | Micro Motion Inc | Instrumento de enlace comun y metodo para limitar predictivamente el consumo de energia en un enlace comun de instrumentacion de dos alambres. |
US8122159B2 (en) * | 2009-01-16 | 2012-02-21 | Allegro Microsystems, Inc. | Determining addresses of electrical components arranged in a daisy chain |
JP2013543216A (ja) * | 2010-09-16 | 2013-11-28 | テララックス, インコーポレイテッド | 電力バスを介した照明ユニットとの通信 |
-
2007
- 2007-09-12 US US12/674,557 patent/US8446977B2/en not_active Expired - Fee Related
- 2007-09-12 EP EP07870620.7A patent/EP2200186B1/en not_active Not-in-force
- 2007-09-12 KR KR1020107007779A patent/KR101171509B1/ko not_active IP Right Cessation
- 2007-09-12 WO PCT/RU2007/000495 patent/WO2009067037A1/ru active Application Filing
- 2007-09-12 CN CN200780100603.7A patent/CN101855840B/zh not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5317597A (en) * | 1989-08-16 | 1994-05-31 | U.S. Philips Corporation | Resistance coupled data transmission arrangement |
RU2050039C1 (ru) * | 1990-08-16 | 1995-12-10 | Василий Николаевич Орищенко | Устройство для передачи и приема дискретной информации по двухпроводной линии |
RU2247469C2 (ru) * | 2002-09-23 | 2005-02-27 | Овчинников Валерий Васильевич | Способ передачи дискретных электических сигналов |
RU2259633C2 (ru) * | 2002-09-23 | 2005-08-27 | Овчинников Валерий Васильевич | Способ передачи дискретных электрических сигналов |
Non-Patent Citations (3)
Title |
---|
"Automatic Identification Data-Book", DALLAS SEMICONDUCTOR®, 1995 |
MAXIM, DS2409 MICROLAN COUPLER, 7 February 2003 (2003-02-07) |
See also references of EP2200186A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011105921A1 (ru) | 2010-02-24 | 2011-09-01 | Ovchinnikov Valery Vasilievich | Способ передачи дискретных электрических сигналов |
CN104584498A (zh) * | 2012-08-24 | 2015-04-29 | 恩德斯+豪斯流量技术股份有限公司 | 用于信号传输和用于电流隔离的电路 |
Also Published As
Publication number | Publication date |
---|---|
US8446977B2 (en) | 2013-05-21 |
US20110110411A1 (en) | 2011-05-12 |
EP2200186B1 (en) | 2016-05-18 |
KR20100089821A (ko) | 2010-08-12 |
EP2200186A4 (en) | 2014-08-06 |
CN101855840B (zh) | 2014-07-23 |
EP2200186A1 (en) | 2010-06-23 |
CN101855840A (zh) | 2010-10-06 |
KR101171509B1 (ko) | 2012-08-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2009067037A1 (fr) | Dispositif de transmission discrète de signaux électriques | |
NO20161143A1 (no) | Fremgangsmåte og system for å kalibrere nedihullsverktøy for drift | |
JP5299675B2 (ja) | 信号伝送装置 | |
US9678919B2 (en) | Collision detection in EIA-485 bus systems | |
AU2010100428B4 (en) | Method and Apparatus for Power Supply Fault Detection | |
RU2435303C2 (ru) | Способ передачи дискретных электрических сигналов | |
RU2549124C2 (ru) | Способ передачи дискретных электрических сигналов | |
RU2247469C2 (ru) | Способ передачи дискретных электических сигналов | |
CN102478850B (zh) | 用于过程现场设备的通信系统 | |
RU2667221C2 (ru) | Источник питания двухпроводной линии связи | |
US10437690B2 (en) | Fault tolerant communication system | |
US6181167B1 (en) | Full duplex CMOS communication | |
US9853749B2 (en) | Data integrity via galvanically isolated analog-to-digital converter for industrial systems | |
RU2642807C1 (ru) | Система передачи сигналов от датчиков с аналоговым выходом по двухпроводной линии (варианты) | |
RU2259633C2 (ru) | Способ передачи дискретных электрических сигналов | |
JP2019193208A (ja) | 電子制御装置 | |
CN111474410B (zh) | 一种电连接器的检测方法 | |
KR20000074847A (ko) | 저전압 차동 신호 통신 시스템 | |
JP2015220579A (ja) | 受信装置 | |
SE9203047L (sv) | Anordning för överföring av information från en första till en andra elektronisk enhet | |
Barmada et al. | Upper and lower bounds for frequency response of PLC channels in presence of load variations | |
Blejan et al. | Signal conditioner for LVDT sensor to analogue signal and RS 232 (RS485) bus. | |
TW201130243A (en) | Method for transmitting discrete electric signals |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200780100603.7 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07870620 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007870620 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12674557 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: PI 2010000665 Country of ref document: MY |
|
ENP | Entry into the national phase |
Ref document number: 20107007779 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009144940 Country of ref document: RU |