Patent ID: 7586432
Filing Date: 2009-09-08
Classification: H03M

Abstract:
1. An A/D converter for sampling and holding one or more analog voltages to be converted, comparing the sampled and held one or more analog voltages to be converted with a reference voltage given by a voltage change value of a ramp voltage having a voltage value changing monotonically for a certain period or a voltage proportional to the voltage change value, converting each of the one or more analog voltages to be converted to a digital value corresponding to the reference voltage, and outputting it, wherein an arithmetic unit that compares each of the one or more analog voltages to be converted with the reference voltage is provided with respect to each of the analog voltages to be converted, each arithmetic unit provided with respect to each of the analog voltages to be converted including a first power supply line for receiving a power supply voltage individually, and each first power supply line being provided as another power supply line not affected by a voltage fluctuation of a second power supply line for supplying a power supply voltage to circuits other than each arithmetic unit provided with respect to each of the analog voltages to be converted.