BASE BAND SIGNAL PROCESSING CIRCUIT FOR SATELLITE BROADCASTING RECEIVING AND SATELLITE BROADCASTING RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide a base band signal processing circuit showing stable performance by preventing the influence of digital noise from being received. ;SOLUTION: This base band signal processing circuit 3 is provided with a low-pass filter 5 extracting a video signal component from a base band signal, a band pass filter 7 extracting a speech signal component and a frequency correction circuit 8 correcting the frequency characteristic of the low-pass filter 5 and the band pass filter 7. A tuning circuit 16 generates a reference frequency signal by extracting a speech sub-carrier wave frequency component included in the base band signal and supplies it for the frequency correction circuit 8. Thereby the circuit is not given influence from digital noise from a QPSK/ PCM processing circuit 13.;COPYRIGHT: (C)1997,JPO