| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise near an input signal frequency and to improve an S/N ratio by the rotation of a unit element using N pointers in a delta sigma A/D converter. SOLUTION: Signals output from a quantizer are converted to the binary number of 3 bits in a DEM 15 provided in an A/D converter, and the pointer to be used and the direction (ascending order/descending order) of the use of the unit element are controlled by a counter 18. The pointer is moved by adding a recorded pointer position and input signals, input x(i) from the quantizer is shifted and output to a D/A converter as y(i) and the unit element is shifted. COPYRIGHT: (C)2007,JPO&INPIT
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