A Low Power Voltage Controlled Oscillator Design

Table 2

VCO circuit	Phase noise (dBc/Hz)	Control voltage
3-stage NAND VCO	−80.9461 at 1 MHz	1.8 V
5-stage NAND VCO	−84.5595 at 1 MHz	1.8 V
7-stage NAND VCO	−86.6507 at 1 MHz	1.8 V