Improved standard cell synthesizable Digitally Controlled Oscillator

A novel Digitally Controlled Oscillator (DCO) architecture adjusting driving strength rather than capacitance for coarse and fine tuning in ring oscillator architectures has been proposed with full digital design flow as part of an effort to fully digitize All Digital Phase Locked Loops (ADPLL). Targeted for automotive wired applications, the design favors portability and flexibility first then area, power and noise performance.