Quadrature voltage-controlled oscillator (QVCO) with improved phase noise and quadrature imbalance trade-off

A method for generating a plurality of oscillating signals, comprising:

• generating a first oscillating signal with a first voltage-controlled oscillator (VCO) circuit;
• biasing a second VCO circuit with the first oscillating signal;
• and
• generating a second oscillating signal with the second VCO circuit, at least one of the first VCO circuit or the second VCO circuit comprising:
• a pair of cross-coupled transistors comprising a first transistor and a second transistor, wherein the first transistor has a gate coupled to a drain of the second transistor and wherein the second transistor has a gate coupled to a drain of the first transistor;
• a first inductive element coupled between a first node and the drain of the first transistor;
• a second inductive element coupled between the first node and the drain of the second transistor;
• a third transistor having a drain coupled to the drain of the first transistor and having a source coupled to a second node;
• and
• a fourth transistor having a drain coupled to the drain of the second transistor and having a source coupled to the second node, wherein the third transistor and the fourth transistor are p-type transistors.