| 摘要 |
According to this A/D converter, a first A/D conversion operation for performing integral A/D conversion and a second A/D conversion operation for performing cyclic A/D conversion are realized based on control of operational procedures in a same circuit configuration. Moreover, in the first A/D conversion operation, since a capacity of a capacitor used in the integration of an output signal is greater than a capacity of a capacitor used for storing an input analog signal and a standard reference voltage, the analog signal that is input in the integral A/D conversion is attenuated according to the capacity ratio and subject to sampling and integration. Consequently, the voltage range of the analog signal that is output in the integral A/D conversion also decreases according to the capacity ratio of the capacitors, and the A/D converter can be therefore constructed with a single-ended configuration. |
