PHYSICAL QUANTITY CHANGE MEASURING DEVICE, PHYSICAL QUANTITY CHANGE MEASURING METHOD, PROGRAM FOR MEASURING PHYSICAL QUANTITY CHANGE, AND RECORDING MEDIUM RECORDING THE PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a physical quantity change measuring device for performing highly accurate quantization without narrowing a measuring range.;SOLUTION: The physical quantity change measuring device includes: a first digital conversion processing part 30 for converting one voltage signal 11a corresponding to the change of a physical quantity into a first digital signal; an analog conversion processing part 31 for converting it into a first analog signal; a subtraction processing part 40 for outputting a subtraction signal 40a subtracting the first analog signal 31a from the other voltage signal 11b; a second amplification part 41 for outputting a signal 41a by enlarging the subtraction signal 40a; a second digital conversion processing part 70 for converting the signal 41a into a second digital signal 70a; and an addition processing part 80 for outputting an output signal 80a adding the second digital signal 70a and the first enlarged digital signal 32a.;COPYRIGHT: (C)2008,JPO&INPIT