The VCO consist of four LC-cores with frequency ranges: 3.5 – 4.15GHz (VCO_4G1), 4.15 – 5 GHz (VCO_5G), 5 – 5.85 GHz (VCO_5G8), 5.85 – 7GHz VCO_7G. Each LC-core has 32 capacitor units for roughly tune ...

The basic architecture of the integer-N LC phase and frequency lock PLL is shown in Figure 4. Integrating programmable capacitances into the voltage-controlled oscillator (VCO) retains the low jitter ...

VCOs having ultra-low phase noise are key components to enable this. Conventionally, a parallel LC-tank is used within a VCO, which has its limitations in minimizing phase-noise. Alternatively, using ...