| 摘要 |
PROBLEM TO BE SOLVED: To provide a sampling circuit, a comparing amplifier circuit and a parallel analog/digital conversion circuit which can achieve a low consumption power and a small area by reducing a number of amplifiers. SOLUTION: The sampling circuit includes: an amplifier A1 which amplifies input signal; a switch SW2 for resetting input to the amplifier A1; multiple capacitors C1, C2 whose one side terminals are connected to an output of the amplifier A1; and multiple switches SW3, SW4 for sampling which are connected to other side terminals of the capacitors C1, C2, respectively. After the switch SW2 for resetting the input and the switch SW3 for sampling are made shorted for a given length of time, respectively, the switch SW4 is made shorted for a given length of time. Thus signals Vo21, Vo22 based on input signals are alternately output from the other side terminals of the respective capacitors C1, C2. COPYRIGHT: (C)2009,JPO&INPIT
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