ADC MEASURING CIRCUIT UNIT CAPABLE OF MEASURING STABLE ADC INPUT DATA IN SPITE OF FLUCTUATING SUPPLY VOLTAGE

摘要

An analog-to-digital conversion (ADC) measuring apparatus capable of measuring a stable ADC input value even with fluctuation of a supply voltage is provided, which includes a power source, a detector, a voltage supply, a reference voltage generator which generates a reference voltage value with respect to a voltage supplied to the detector, an ADC input portion which receives an ADC input value representing a voltage depending upon change of resistivity of an inherent resistor of the detector, and an ADC calculator which calculates a ratio of the reference voltage value with respect to the ADC input value and thus produces an ADC resultant value.