Patent ID: 8621256

Claim:
A signal processing device comprising: an analog signal processing circuit; a digital data processing circuit; a determination section configured to determine an influence of the digital data processing circuit on the analog signal processing circuit; and a control section configured to stop a partial circuit of the digital data processing circuit or lower processing capability thereof in response to a determination result of the determination section; wherein the digital data processing circuit includes a plurality of data processing circuits configured to perform data processes independent of each other, wherein the determination section determines an influence of each data processing circuit on the analog signal processing circuit, wherein the control section stops a partial data processing circuit of the plurality of data processing circuits and a data processing circuit determined to influence the analog signal processing circuit or lowers processing capability thereof, and wherein the determination section is adapted to: obtain an influence level of each data processing circuit by acquiring state information of each data processing circuit; acquire state information of the analog signal processing circuit; obtain an influence level corresponding to a state of the signal processing device by acquiring state information of the signal processing device; obtain an influence level of the entire digital data processing circuit on the analog signal processing circuit using the influence level corresponding to the state of the signal processing device, the influence level of each data processing circuit, and the state information of the analog signal processing circuit; and determine that the digital data processing circuit has an influence when the influence level of the entire analog signal processing circuit exceeds a limit value.