Is lower than sampling frequency possesses the cutoff frequency which possesses the low-pass filter null

摘要

(57) Abstract The figure tablet includes the part of the pair which is made to contact mutually electrically under the user interaction. X coordinate of contact and the electric information which displays the Y-coordinate are generated. This signal the filter is processed with low-pass filter processing expedient. The filter X signal and the Y signal which were processed, as the sample it does making use of the sampling frequency of specification, individual X and are kept in Y holding expedient. Cutoff frequency of filter processing expedient, because if each holding expedient that should have set only increment and the decrement for the sample value which is remembered, at portion of time makes decrease at least more considerably than sampling frequency under. Therefore, the spectrum where noise is removed is made wider than past.