Process for transferring information and system for carrying out the process
First Claim
1. A process for transferring information between electrical devices interconnected via at least two power supply lines which at least carry an alternating supply current, and wherein current in a power supply line is at least partially blocked for transferring information, characterized by the operation that depending upon a first type of information to be transferred, current flow in a power supply line is blocked at least partially in positionally determined periods constituting a fraction of a halfwave interval, and that a second type of information is transmitted on the power supply lines from at least one of the devices in at least one of said positionally determined periods.
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Accused Products
Abstract
An arrangement for transferring both power and information on one or more common AC power lines in which a first type of information is transmitted by terminating the current from the power supply in periods which constitute a fraction of a halfwave cycle. The transmission of this first type of information is dependent upon the frequency of the AC power supply. A second type of information is transmitted during the periods in which the current from the power supply is terminated, and the second type of information is transmitted at a higher frequency independent of that of the AC power supply.
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Citations
7 Claims
- 1. A process for transferring information between electrical devices interconnected via at least two power supply lines which at least carry an alternating supply current, and wherein current in a power supply line is at least partially blocked for transferring information, characterized by the operation that depending upon a first type of information to be transferred, current flow in a power supply line is blocked at least partially in positionally determined periods constituting a fraction of a halfwave interval, and that a second type of information is transmitted on the power supply lines from at least one of the devices in at least one of said positionally determined periods.
Specification