Analog quantity input signal regulating circuit

Published:2011/6/21 8:31:00 Author:TaoXi | Keyword: Analog quantity, input signal, regulating circuit | From:SeekIC

The data acquisition circuit is mainly responsible for the conversion of the analog signals such as the voltage and current. Because the detected voltage and current quantity value is large, the value is far more than the allowed input signal range of DSP, so we need to reduce the value of these analog signals, and change the current quantity into the voltage quantity, also we need to change the dual-polarity signal into the single-polarity signal, and match the level, the A/D is sent into the DSP for operating. The realization method is summarized as follow: the voltage and current signals are converted by the current model Hall sensor, and form the voltage signal which is proportional to the original signal on the high precision sampling resistance.



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