| 摘要 |
PROBLEM TO BE SOLVED: To efficiently reduce a switching noise without deteriorating the quality of a signal. SOLUTION: A first sample/hold means 11a of this noise reducing device inputs an input signal Si, and samples/holds a noise block with first hold length, and generates a first sample/hold signal SH1. A second sample/hold means 11b samples/holds the noise block with second hold length, and generates a second sample/hold signal SH2. A delaying means 12 delays the first sample/hold signal SH1 by the time of the second hold length, and generates a delayed sample/hold signal SHd. A level converting means 13 converts the level of the hold length block of the delayed sample/hold signal SHd into the level of the hold length block of the second sample/hold signal SH2, and generates a noise mask signal So.
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