| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal processor capable of suppressing degradation in 1-bit output signal in a 1-bit signal process, even if the 1-bit signal acquired with high-orderΔΣmodulation is processed. SOLUTION: The signal processor comprises a 7th orderΔΣmodulation circuit 21, a secondaryΔΣmodulation circuit 16 whose order is lower than the 7thΔΣmodulation circuit 21, an adder 6 which adds an output signal of the 7thΔΣmodulation circuit 21 to the output signal of the secondaryΔΣmodulation circuit 16, a low pass filter 22 for inputting an output signal of the adder 6, and a secondaryΔΣmodulation circuit 17 which is aΔΣmodulation circuit with lower order number than the 7thΔΣmodulation circuit 21 toΔΣmodulate the output signal of the low pass filter 22. COPYRIGHT: (C)2007,JPO&INPIT
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