| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a function to correct filtering characteristics of an analog filter by a simple circuit for the filtering circuit with the analog filter which includes a filtering characteristics adjustment function. <P>SOLUTION: The circuit includes the analog filter 50, an oscillator 61 as a replica circuit, and a frequency comparison logic 62, and the frequency comparison logic 62 simultaneously adjusts both the oscillator 61 and the analog filter 50 so that an oscillation frequency of the oscillator 61 becomes a reference frequency. <P>COPYRIGHT: (C)2010,JPO&INPIT |
