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Design of program-controlled filter based on X9241M digital potentiometer.pdf

  • 2013-08-31
  • 642.92KB
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Abstract: With AT 89S52 single-chip microcomputer as the control core and X9241M digital potentiometer, a programmable filter with adjustable cutoff frequency is designed by selecting resistors of different resistance values ​​in the digital potentiometer through software. The experimental results show that when the cutoff frequency of the programmable filter is stepped from 6 kHz to 20 kHz, the cutoff frequency error is not greater than 10%. The system can be used for filtering of acquisition system signals.

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