SAMPLING CIRCUIT, A/D CONVERTER, D/A CONVERTER AND CODEC

摘要

PROBLEM TO BE SOLVED: To provide an A/D converter that can reduce effects of noise on electronic components mounted on an electronic apparatus while leaving the electronic components downsized as they are and avoiding advancement of process technology.SOLUTION: The A/D converter includes a continuous section 130a for outputting an analog signal that is a continuous signal yet to be sampled and quantized, and a sample-and-hold section 130b connected to the continuous section 130a to output a sampled signal to the continuous section 130a or to the outside. The sample-and-hold section 130b operates on a clock signal &phgr;2' with jitter having one or more frequencies added.