| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipelined analog/digital converter having the high degree of freedom in design and reduced circuit scale/power consumption. SOLUTION: Bit blocks 10-13 each having A/D a converter (AD1-AD3) for converting an analog signal into a digital code of a distributed predetermined bit, a D/A converter (DA1-DA3) for converting the digital code into an analog signal and an amplifier (AMP0-AMP3) are connected in cascade. The amplification unit of each of the bit blocks amplifies the difference between an analog signal from the prestage and an analog signal from each of the D/A converters to sequentially supply to the next stage bit block. In that case, amplification units of the adjacent bit blocks share an amplifier (amplifier share) to ensure a high DC gain. COPYRIGHT: (C)2006,JPO&NCIPI
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