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Device for data exchange between a transmitter and a receiver

A technology of transmitter and receiver, applied in the direction of digital transmission system, multiplexing communication, time division multiplexing system, etc.

Inactive Publication Date: 2006-02-15
SOMFY SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, its value must be so small that limiting the effect of the sense current

Method used

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  • Device for data exchange between a transmitter and a receiver
  • Device for data exchange between a transmitter and a receiver
  • Device for data exchange between a transmitter and a receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] A first embodiment of the device for exchanging information according to the invention comprises a transmitter SA3 and a receiver SB3 interconnected by a cable having two conductors, the resistances of which are indicated by the symbols RL1, RL2. The transmitter SA3 includes a transistor TA3 and is identical to the transmitter SA2 described above. The receiver SB3 comprises a voltage source VDDB for supplying a voltage to a resistor RB4 and a transistor TB3 arranged in series. The base of the transmitter TB3 is connected to the end of the conductor of the cable via a DC voltage generator P3, such as a dry cell or an accumulator, and a resistor RB3. Transistor TA3 is controlled by a circuit (not shown), and operates in a switching manner. A voltage Us is obtained between the emitter and collector of transistor TB3.

[0020] In this way, a message is encoded as a sequence of states of the transistor TA3 at the transmitter and decoded by measuring the change of the volta...

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PUM

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Abstract

The inventive data exchange device comprises a transmitter (SA4) fed by a power supply (VDDA), an electric cable (C1) whose first conducting wire is connected to a fixed potential point (GNDA) of the transmitter and second conducting wire is connected to a variable potential point of the transmitter and a receiver (SB4). Said receiver (SB4) comprises a component (DZB4) which defines a voltage threshold opposite to the direction of electric current in the cable (C1). Said device is embodied in such a way that it is simple and low-cost in the production thereof. The device makes it possible to interconnect a plurality of transmitters and receivers and is low sensitive with respect to voltage and parasite currents.

Description

technical field [0001] The invention relates to a device for exchanging information, comprising a transmitter powered by a power source, a cable in which a first conductor is connected to a fixed potential point of the transmitter, and a second conductor is connected to a variable potential point of the transmitter. Potential points are connected, and at least one receiver. Background technique [0002] Such devices are widely used to exchange information. On the one hand, they require shielded cables or twisted wire pairs that are protected against electromagnetic radiation, and on the other hand, the use of circuits for generating the signals constituting the information and circuits for shaping these signals. Data transmission devices using the EIB (registered trademark), LONWORKS (registered trademark) or RS485 standards are known, for example. Such a system is very competitive, enabling information to be transmitted at a high bit rate. However, the size of these devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/02H04L25/02H04L25/08H04L25/45
CPCH04B3/02H04L25/085H04L25/0292H04B15/00H03H7/46H04J3/02
Inventor 马库斯·黑黎各
Owner SOMFY SAS