RESISTOR-CAPACITOR OSCILLATION CIRCUIT CAPABLE OF ADJUSTING OSCILLATION FREQUENCY AND METHOD OF THE SAME

摘要

There is provided an RC oscillation circuit capable of adjusting an oscillation frequency, and an oscillation method thereof. The RC oscillation circuit including: an RC oscillator including a variable resistor and a variable capacitor, the RC oscillator generating an RC oscillating signal having a frequency determined by a resistance of the variable resistor and a capacitance of the variable capacitor; a counter counting a clock number of a reference oscillating signal corresponding to one period of the RC oscillating signal to generate a first count value, the reference oscillating signal having a preset frequency; and a frequency controller controlling a frequency of the RC oscillating signal by determining the resistance of the variable resistor and the capacitance of the variable capacitor such that a difference between the first count value and a preset second count value is smaller than a preset first critical value.