| 摘要 |
PROBLEM TO BE SOLVED: To provide a sample and hold circuit in which settling time during a transition time from a hold interval to a sampling interval is reduced. SOLUTION: In a reset state in which a first switch SW1 is closed, a short-circuit switch means SW4 short-circuits first and second electrodes of a hold capacitor CH. In a sample state after the reset state, the first switch SW1 and a second switch SW2 are turned on. In a hold state, a third switch SW3 is turned on. During the transition from the hold state of a previous cycle to the sample state of a next cycle, a short-circuit switch means SW4 short-circuits the capacitor CH and discharges electric charges. Thus, the settling time during the transition time is reduced. COPYRIGHT: (C)2004,JPO
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