Oscillator is a very important device of significant components in electronic products. This invent proposes a new method for calibrating oscillator frequency. By this technique, the oscillator product using this invent can output the frequency of clock signal flexibly from 1MHz to 200MHz through a programmer setting. This invent is the first low-cost oscillator control chip in the world that can set the frequency of output clock signal. In addition, this invent developed the smallest package 20x16 mm2 oscillator for next-generation consumer electronics in the world.