DIGITALLY CONTROLLED OSCILLATOR HAVING IMPROVED LINEARITY

摘要

There is provided a digitally controlled oscillator. The digitally controlled oscillator includes a resonance circuit unit generating a resonance signal according to an equivalent capacitance formed by a parallel connection between a first capacitance varied depending on a digital control code and a second capacitance varied depending on an inverted digital control code generated by inverting the digital control code, and preset inductance; and an oscillation circuit unit providing negative resistance to the resonance circuit unit and forming oscillation conditions in the resonance circuit unit.