TOUCH SENSOR CHIP BY USING DYNAMIC FREQUENCY MODULATION AND OPERATION METHOD OF THE SAME

摘要

PURPOSE: A touch sensor chip and operation method using a dynamic frequency modulation are provided to exactly recognize a touch by reducing influence of a noise interrupting a sensing signal. CONSTITUTION: A touch receiver(220) senses a sensing signal corresponding to a touch. A dynamic frequency modulator(240) hops a first center frequency of the sensing signal to a second center frequency. A touch determiner(230) determines the touch based on a sensing signal of the hopped second center frequency. The dynamic frequency modulator stores hopping sequences. The dynamic frequency modulator hops the first center frequency to the second center frequency by using one hopping sequence.