| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital broadcast wave relay device of which the circuit constitution can be made simple and compact. SOLUTION: A received RF signal is converted into an IF signal by a down converter 111 based on a first local oscillation signal, and then digitally converted by an analog-to-digital converting circuit 112 based on a second local oscillation signal. A digital signal processing circuit 113 applies signal processing to the digitally converted IF signal based on the second local oscillation signal. The processed signal is converted by a digital-to-analog converting circuit 114 into an analog IF signal based on the second local oscillation signal, and then converted into an RF signal by an up converter 115 based on the first local oscillation signal. A first local oscillation circuit 117 and a second local oscillation circuit 118 generates the first and second local oscillation signals respectively based on a common reference signal generated by a reference signal generation section 119. COPYRIGHT: (C)2008,JPO&INPIT |
