A novel sinusoidal VCO using six digital CMOS inverters is presented in this paper. Simulation with BSIM3V3 parameters of a typical CMOS 0.35 μm process indicates oscillations from 1.28GHz to 1.46GHz. Using two additional capacitances about 300fF, the corresponding frequency range is 491MHz-562MHz. The equivalent total power consumption in both cases is lower than llmW. For 1.4GHz oscillation, the simulated phase noise at ΔF=1 MHz is lower than -94dBc/Hz. The proposed circuit operation has been acted from measurements with the commercial HEF4069UBP from Philips semiconductors [1].