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21 April 2003 CMOS mixed-signal MODEM for data transmission and control of electrical household appliances using the low-voltage power line
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Proceedings Volume 5117, VLSI Circuits and Systems; (2003)
Event: Microtechnologies for the New Millennium 2003, 2003, Maspalomas, Gran Canaria, Canary Islands, Spain
This paper presents a CMOS mixed-signal MODEM ASIC for data transmission on the low-voltage power line. The circuit includes all the analog circuitry needed for input interfacing and modulation/demodulation (PLL-based frequency synthesis, slave filter banks with PLL master VCO for tuning, and decision circuitry) plus the logic circuitry needed for control purposes. To allow the communication between the electrical household appliances and a remote unit to control them as well as to reduce the cost, an unique mixed-signal ASIC, made of two parts, one operating at high frequencies and another operating at lower frequencies, has been designed. The High Frequencies Module must allow the connection with the external control systems and, to ensure reasonable robustness, has to be able to send and receive signals using at least two different channels (to avoid local and temporary degradations of the communication). The Low Frequencies Module is needed to manage the indoors communication. This module enables the transmission of signals within distances between 50 and 100 meters with a speed in the order of, but never less than, 100 bits/s. This link should be accomplished by using a frequency range in such a way that a maximum number of channels are disposable to allow the control of as many different in-house devices as possible. Again, to this end, two different tunable channels have to be simultaneously available: one to control the quality of the signal and the other to allow the effective communication.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sara Escalera, Carlos Manuel Dominguez-Matas, Jose Manuel Garcia-Gonzalez, Oscar Guerra, and Angel Rodriguez-Vazquez "CMOS mixed-signal MODEM for data transmission and control of electrical household appliances using the low-voltage power line", Proc. SPIE 5117, VLSI Circuits and Systems, (21 April 2003);


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