SATELLITE BROADCASTING RECEIVER AND VIDEO TAPE RECORDER BUILT-IN TYPE TELEVISION RECEIVER

摘要

PURPOSE:To reduce power consumption and to remove mutual interference between plural received signals by driving only a circuit necessary for reception and completely separating circuits relating to plural secondary converters. CONSTITUTION:At the time of receiving satellite broadcasting, a microcomputer 8 turns on a switch 14. Although a power supply circuit 11 is turned on and a secondary converter 7 is turned to a driven state at the time of receiving the broadcasting only by the converter 7 side, a power supply circuit 10 is held at an off state and a secondary converter 6 is not driven. Power supply for a primary converter 2 which is generated by a main power supply circuit 9 is supplied to the converter 2 through a switch 4, the input side 51 of a distributer 5 and an antenna cable 3 to turn the converter 2 to a driven state. Consequently power consumption can be saved and receiving circuits 12, 13 and power supply circuits 10, 11 for respective converters 6, 7 can be mutually completely separated, so that an adverse effect due to the mutual interference of received signals by both the converters 6, 7 can be removed.