| 摘要 |
PURPOSE:To prevent deterioration of accuracy caused by influency due to an external factor, and to output an analog signal of high accuracy and high image resolution by the minimum time, by executing digital/analog conversion by a digital optional function value. CONSTITUTION:An analog signal from an analog signal input terminal 1 is inputted to a comparing circuit 3, is compared with an analog signal from a D/A converting circuit 4, and a result of its comparison becomes an input signal of a controlling circuit 5. A digital signal is outputted to a digital signal output terminal 6, monitoring an output state of the circuit 3 by this controlling circuit 5, and also is inputted to an optional function generating circuit 7. Subsequently, a digital optional function value corresponding to the digital signal of the controlling circuit 5 is generated from the circuit 7, and its optional function value is inputted to the converting circuit 4, so that an analog signal of high accuracy and high image resolution can be outputted in the minimum time. |
