| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve both noise characteristics and distortion characteristics and further to set the respective characteristics in better balance. SOLUTION: First and second active low-pass filters(LPF) 6 and 7 are respectively balanced ones, and a first base band signal is differentially outputted from a first D/A converter 2 and differentially inputted to the first active LPF 6. A second base band signal is differentially outputted from a second D/A converter 3 and differentially inputted to the second active FPF 7. The first base band signal is differentially outputted from the first active LPF 6, and the second base band signal is differentially outputted from the second active LPF 7.</p> |
