A 2.5 V, 10 GHz fully integrated LC-VCO with integrated high-Q inductor and 30% tuning range
A 10 GHz fully integrated Voltage Controlled Oscillator is presented. A 29.7% tuning range is achieved from a 2.5 V power supply. The phase noise is - 113 dBc/Hz at 600 kHz and - 127 dBc/Hz at 3 MHz. The VCO is implemented in a 0.25 mum 4 metal layer standard CMOS technology. This design will be used to discuss design and layout issues for high frequency LC-oscillators. A thorough analysis will be made of the contribution of the different building blocks to the performance of the total circuit.
vco phase noise cmos analog integrated circuits lc-tank spiral inductor