| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal conditioning circuit that performs time division multiplexing of anti-aliasing filters and A/D converter. SOLUTION: A plurality of first tier multiplexers performs time division multiplexing via one of a plurality of anti-aliasing filters between a plurality of AC or baseband input signals from a plurality of sensors. A second tier multiplexer selects its inputs from the outputs of the first tier multiplexers. The output of the second tier multiplexer is supplied to a high-speed A/D converter. Thus, the A/D converter is subjected to time division multiplexing by the second tier multiplexer. In this manner, a plurality of sensors can share a single A/D converter. After allowing a settling time for the multiplexers and anti-aliasing filters, a plurality of samples of the input signals are taken for one period, for example. COPYRIGHT: (C)2011,JPO&INPIT
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