Patent ID: 6377163
Filing Date: 2002-04-23
Classification: H02J,Y02B,Y02E,Y04S

Abstract:
A circuit for transmitting communication signals over an alternating current (a.c.) low-frequency power line, said circuit comprising:(a) a rectifier operatively coupled to the a.c. power line for generating an unfiltered rectified direct current (d.c.) voltage signal; and (b) a voltage-to-current converter (VCC) operatively coupled to said rectifier for receiving said unfiltered rectified d.c. voltage signal, said VCC adapted for receiving a high-frequency a.c.-shaped communication voltage signal and for generating an output current in response to said high-frequency a.c.-shaped communication voltage signal and said unfiltered rectified d.c. voltage signal, said output current including a high-frequency a.c. component from said high-frequency a.c.-shaped communication voltage signal superimposed on a low-frequency d.c. component from said unfiltered rectified d.c. voltage signal, said superimposed high-frequency a.c.-shaped signal component placing communication signals on the a.c. power line through said rectifier.