| 摘要 |
PROBLEM TO BE SOLVED: To prevent an increase in a circuit area of an analog-to-digital converter. SOLUTION: An input signal processing unit 1 sets a voltage of an input signal of a signal voltage Vin at an initial value, subtracts 1/2<SP>n</SP>of an input range V<SB>R</SB>from the n-th (n is a positive integer) signal voltage based on a comparison result output from a comparator 3, and outputs the (n+1)th signal voltage. A reference voltage output unit 2 outputs a reference voltage to be compared with the signal voltage output from the input signal processing unit 1, the reference voltage being obtained by repeatedly reducing one half of the input range V<SB>R</SB>. The comparator 3 compares the signal voltage output from the input signal processing unit 1 with the reference voltage output from the reference voltage output unit 2. COPYRIGHT: (C)2010,JPO&INPIT
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