Patent ID: 9148158
Filing Date: 2015-09-29
Classification: G01D,G01R,H03M

Abstract:
1. A signal processing device comprising: a combination unit configured to combine a plurality of element signals based on a plurality of physical quantity signals including signal components in accordance with desired physical quantities, respectively, by the number of times equal to or greater than a number of the plurality of physical quantity signals, and to output combined signals different from each other; a measuring unit configured to sequentially receive the combined signals output from the combination unit; a computing unit configured to compute the signal components based on the desired physical quantities from signals that are generated based on the combined signals sequentially output from the measuring unit; and a signal inverting unit configured to receive the plurality of physical quantity signals, wherein the signal inverting unit outputs a predetermined signal of the plurality of element signals respectively corresponding to the physical quantity signals as an inverted signal in which a physical quantity signal is inverted as an element signal, and outputs a remaining signal of the plurality of element signals as a non-inverted signal in which the physical quantity signal is not inverted as the element signal, wherein the signal inverting unit performs an amplification process of amplifying one or more signals of the plurality of physical quantity signals at a predetermined amplification rate, and not amplifying or amplifying a remaining signal of the plurality of physical quantity signals at another amplification rate different from the predetermined amplification rate, wherein the signal inverting unit performs an inversion process of inverting the physical quantity signal of a predetermined signal of the plurality of physical quantity signals to become the inverted signal, and not inverting the physical quantity signal of a remaining signal to become a non-inverted signal, wherein the signal inverting unit outputs signals of the plurality of physical quantity signals in which the amplification process and the inversion process are respectively performed as the plurality of element signals, and wherein the combination unit combines the plurality of element signals including the inverted signal of the plurality of element signals and the element signal including the non-inverted signals of the plurality of element signals by the number of times equal to or greater than the number of the plurality of physical quantity signals, and outputs the combined signals.