Abstract
A new method to establish the high differential linearity on the Sucessive Approximation Analog to Digital Converter (SAADC) is proposed. The SAADC is a popular ADC but has poor differential linearity (large channel width irregularity) in comparison with the other type of ADC. Because of this reason, the SAADC is not usable for the precise measurement of the probability density function. E. Gatti and others established a way of smoothing the channel width of the SAADC by moving the signal base. This method is called the Sliding Scale Method.
In this paper, a new method to obtain the high differential linearity is proposed. On this proposed method, the SAADC is fused with the single channel method.
The feasibility of this newly proposed method is confirmed through some experiments by the use of test signals.
