APPARATUS AND METHOD FOR GENERATING SINUSOIDAL WAVES, AND SYSTEM FOR DRIVING PIEZO ACTUATOR USING THE SAME

摘要

There are provided an apparatus and a method for generating sinusoidal waves, and a system for driving a piezo actuator using the same. The apparatus for generating sinusoidal waves includes: a look-up table storage unit storing a look-up table including a plurality of sampling points, determined based on a base frequency and a sampling frequency; a sinusoidal wave generating unit calculating an integer ratio of a target frequency to the base frequency and obtaining sampling points from the look-up table by reflecting the integer ratio; and a sampling point correction unit determining whether sampling points obtained by the sinusoidal wave generating unit correspond to sampling points corresponding to the maximum and minimum levels of a predetermined sinusoidal wave, to correct the sampling points obtained by the sinusoidal wave generating unit.

主权项

1. An apparatus for generating sinusoidal waves, comprising:
a look-up table storage unit storing a look-up table including a plurality of sampling points, determined based on a base frequency and a sampling frequency; a sinusoidal wave generating unit calculating an integer ratio of a target frequency to the base frequency and obtaining sampling points from the look-up table by reflecting the integer ratio; and a sampling point correction unit determining whether sampling points obtained by the sinusoidal wave generating unit correspond to sampling points corresponding to the maximum and minimum levels of a predetermined sinusoidal wave, to correct the sampling points obtained by the sinusoidal wave generating unit, wherein the sinusoidal wave generating unit generates a sinusoidal wave based on the sampling points corrected by the sampling point correction unit.