| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a thermal flow-rate sensor which can be miniaturized, which can be made at low-cost and whose accuracy is made high by a circuit constitution wherein a voltage-to-current conversion part which adjusts a gain simultaneously with reference to a detection voltage according to a flow rate from a sensor part is provided and a correction part by which an obtained detection current can be corrected with high accuracy by a discrete component is provided. SOLUTION: In a thermal flow-rate sensor, a voltage-to-current conversion part 500 which adjusts a gain simultaneously, a correction part 300 which corrects a converted detection current and a current output circuit 600 which outputs a current signal according to a flow rate from a sensor part constitute a computing and processing means which processes a detection voltage according to a flow rate from a flow-rate detecting means 100. The correction part 300 is constituted of a one-way conduction element (a discrete component) which is irrespective of an identical characteristic.</p> |
