METHOD FOR TRANSMITTING DISCRETE ELECTRIC SIGNALS

• US 20110110411A1
• Filed: 09/12/2007
• Published: 05/12/2011
• Est. Priority Date: 09/12/2007
• Status: Active Grant

• Current Assignee: Valery Vasilievich Ovchinnikov
• Original Assignee: Valery Vasilievich Ovchinnikov
• Inventors: Ovchinnikov, Valery Vasilievich
• Granted Patent: US 8,446,977 B2
• Time in Patent Office: Days
• US Class Current: 375/224
• CPC Class Codes: H04B 3/50 Systems for transmission between fixed stations via two-conductor transmission lines H04B3/54 takes precedence
• CPC Class Codes: H04L 25/0282 Provision for current-mode coupling
• CPC Class Codes: H04L 25/0294 Provision for current-mode coupling

Abstract

The invention relates to information transmission methods, in particular to the communication interfaces of electronic devices. The inventive method makes it possible to increase the communication range and reliability by improving noise protection through the compensation of a noise signal during the transmission and reading of the signal in both wires of a communication line. The inventive method involves connecting the first pole of a voltage supply source to the first wire of a two-wire transmission line via a first resistor and connecting the second pole of said voltage supply source to the second wire of the two-wire transmission line via a second resistor. Moreover, the first and second resistors have the equal resistance values, and a receiver is connected to the two-wire transmission line between a transmitter and the voltage supply source and is provided with two current sensors. A reading signal is defined as the sum of absolute values of the measured currents.

Claims

1. Method for transmitting discrete signals from a transmitter to a receiver connected to a two-wire communication line with a voltage supply source, where the reading signal is determined as a logic zero and one by the level of signal in the communication line, relative to preset thresholds, characterized in that the receiver is connected to the two-wire communication line between the transmitter and the voltage supply source, and is provided with two current sensors, each installed in one of the wires of the two-wire communication line, the signal transmission being exercised by the transmitter changing the current in the two-wire communication line owing to its output resistance being changed and the two sensors measuring the value of the current, where the reading signal is determined as a sum of absolute values of the measured currents.

2. Method of claim 1, wherein the first pole of the voltage supply source is connected to the first wire of the two-wire communication line via the first resistor, while the second pole of the voltage supply source is connected to the second wire of the two-wire communication line via the second resistor, where the first and the second resistors have the same resistance values.