Published:2012/7/23 3:01:00 Author:Ecco | Keyword: filter | From:SeekIC
The system design uses a pin programmable filter MAX264 to realize low-pass or high pass filter, and the circuit is shown in the figure ( Attenuation amplification network). The circuit design uses unipolar input mode, and its input voltage range is 0 V to 5 V. When people adjust circuit, the signal should be adjusted to the input range. Conditioning process: the signal first passes the attenuation network to make the peak - the peak be -2.5 V ~ +2.5 V, then the adder adjusts the signal to the range of 0 V ~~ 5 V, after filtering , the subtractor turns signal into - 2.5 V ~ +2.5 V, and zoom network is used to compensate balance attenuation, then the circuit outputs the rms to converter circuit.
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