Patent ID: 8947284
Filing Date: 2015-02-03
Classification: H03M

Abstract:
1. An AD converter comprising a plurality of channels of AD converting sections that sequentially operate at predetermined time intervals, wherein each of the AD converting sections comprises: a data converting section that converts an analog signal into a digital signal and outputs the digital signal; an analog polarity converting circuit that inverts or does not invert a polarity of an analog input signal before supplying the analog input signal to the data converting section as the analog signal; a digital polarity converting circuit that inverts or does not invert a polarity of the digital signal from the data converting section before outputting the digital signal; and a controlling section that controls inversion processing by the analog polarity converting circuit and the digital polarity converting circuit based on a specific polarity value that indicates the polarity of the digital signal obtained from the data converting section in a case where an analog signal at a reference voltage is supplied to the data converting section.