| 摘要 |
PROBLEM TO BE SOLVED: To provide a D/A converter, which operates with low power supply voltages and outputs an output signal of very little high frequency and noise components. SOLUTION: While a clockϕ1 is at a high level, based on a digital signal, capacity elements C11 to C1i are connected between a reference voltage Vr+ or Vr- and a sampling ground V1 and an electric charge according to the difference between the reference voltage and the sampling ground V1 is held, and capacity elements C21 to C2i are connected between the reference voltage Vr+ or Vr- and a sampling ground V2 and an electric charge according to the difference between the reference voltage and the sampling ground V2 is held, and the capacity, elements C11 to C1i and capacity elements C21 to C2i are connected between an input and output terminals of a computing amplifier 100 in parallel to a feedback capacity element Cfb when a clockϕ2 is at a high level. COPYRIGHT: (C)2004,JPO
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