Echelon Corporation (ELON) Message Board

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Technology Stocks : Echelon Corporation (ELON)

ELON 21.88

+10.1%

Oct 6 5:00 PM EST

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To: Roger A. Babb who wrote (1433)	3/19/2000 3:05:00 AM
From: KW Wingman	Read Replies (2) of 3076

A minute portion of the signal is coupled to the primary by the transformer action. If a very sensitive receiver is used, it is possible to receive the signal without an additional amplifier circuit. The CIA and KGB could do that 20 or 30 years ago so I don't see why is a big deal now. Doing it today at high speed is a different story. Moderate speed SB fine for many applications like meter reading. If that is not good enough for you, a simple, cheap electronics circuit could be placed at each transformer. The "signal" can be picked up from the secondary, amplified and coupled to the primary side. By using optical isolators on both sides, this circuit would maintain isolation of the primary and secondary sides of the transformer For example, this circuit could send the power meter reading to the utility company, no more meter reader. The cost of this circuit would be paid for in short order. <But it is for communications over the powerlines only WITHIN the house. The signals will not pass through the transformers to go further than that.>

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