| 摘要 |
This microsystem enables a phenomenon, whose evolution over time is random, to be analyzed. It comprises means for reducing its consumption of energy which acts via a modification of the operating features of the microsystem, the effect of this modification being the passage of said microsystem from an active state to at least one other state, for example a stand-by state. A phenomenon detecting device (30 to 50) generates a representative signal (Vout) which represents the evolution of the phenomenon over time. The representative signal is provided for utilization at an output terminal (37). The microsystem also comprises a threshold circuit (36) connected to the detecting device (30 to 35) and the output terminal (37) for subjecting the representative signal (Vout) to a comparison with a predetermined threshold and for generating a corresponding comparison signal ("mod"). A feedback circuit (38) acts, in response to the comparison signal, upon the detecting device (30 to 35) to modify its detecting performance, this feedback circuit being capable of modifying at least one operating parameter (fHI; IPI; VOI; Vfbi) of the microsystem, the effect of this modification being a change in its energy consumption.
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