A Monotonic, low power and high resolution digitally controlled oscillator

In this paper a monotonic and low power Digitally controlled oscillator (DCO) ispresented. The proposed DCO uses a cascading structure to achieve high resolution andwide frequency range at the same time. In addition it employs the interpolation method tosolve the non monotonic problem in cascading structure. The proposed DCO has beensimulated with a standard performance 65nm complementary metal-oxide semiconductorprocess. Simulation result shows that power consumption can be improved to114μw(@1.516GHZ), and 81μw (@447.1MHZ) with 0.8 ps resolution.

Keywords:

Digitally controlled oscillator (DCO) , Low power , Monotonic , Highresolution , jitter