Patent ID: 9551732
Date: 2017-01-24
CPC Classifications: G01R

Claim:
1. An apparatus for alternating current (AC) physical signal measurement and data acquisition, comprising: an analog sampling channel configured to: perform analog sampling on an input AC physical signal to obtain an analog sampling value; a sampling switch configured to: re-sample the analog sampling value to satisfy a requirement by a receiving side on data acquisition frequency; a register configured to: store a re-sampling value from the sampling switch; a bus configured to: output the re-sampling value in the register to the receiving side; a timing controller configured to: control the analog sampling channel and the re-sampling frequency of the sampling switch; and a digital low-pass filter, which has an input connected with the analog sampling value outputted by the analog sampling channel and an output connected with the sampling switch, filters out high frequency components from the analog sampling value, wherein a cut-off frequency of the digital low-pass filter is lower than 0.5 times the re-sampling frequency of the sampling switch.