| 摘要 |
PROBLEM TO BE SOLVED: To provide a &Dgr;&Sgr; modulator that has a highly precise characteristic.SOLUTION: According to an embodiment, the delta-sigma modulator includes: a first multiplier 101 based on a reference capacitor having a capacitance Cand a first variable capacitor having a variable capacitance Cdepending on a distance between electrodes which is defined by a multiplier given by C/Cand supplied with a reference voltage; a second multiplier 102 based on a second variable capacitor having a variable capacitance Cand a third variable capacitor having a variable capacitance Cwhich is defined by a multiplier given by C/Cand disposed in a feedback path 107; and an adder 103 for adding an output of the first multiplier and an output of the second multiplier. C, Cand Care the same. |
