Communications: electrical – Systems – Selsyn type
Patent
1975-10-28
1977-11-08
Habecker, Thomas B.
Communications: electrical
Systems
Selsyn type
307126, 325320, 325323, H04M 1104
Patent
active
040577937
ABSTRACT:
A current carrier communication system for selectively transmitting binary electrical signals from a first location to a second location over the AC power lines in a AC power distribution network in a building comprising a first tone generating means operatively connected to a first source of binary electrical signals for generating a first tone signal at a first frequency, a second tone generating means operatively connected to a second source of binary electrical signals for generating a second tone signal at a second frequency, linear tone summing means operatively connected to the first and second tone generating means for generating a modulating signal output that is a linear sum of the first and second tone signals, a source of RF signals connected to said linear tone summing means to produce a modulated RF output signal modulated by the modulating signal output of the linear tone summing means to the AC power lines, receiver coupling means at said second location directly coupled to receive said modulated RF output signal therefrom, a TRF multi-stage receiver connected for receiving the modulated RF output signal from the AC power lines and producing an amplified modulated RF output signal corresponding to the received modulated RF output signal, demodulation means operatively connected to the TRF receiver for demodulating the received signal, a first phase locked loop detector connected to the demodulation means for detecting the presence of the first tone in the demodulated signal and a second phase locked loop detector connected to the demodulation means for detecting the presence of the second tone in the demodulated signal.
REFERENCES:
patent: 3818481 (1974-06-01), Dorfman
patent: 3909618 (1975-09-01), Fujii
Ellison Boris
Johnson Raymond E.
LandOfFree
Current carrier communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current carrier communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current carrier communication system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-231250