Systems and methods for implementing a dual-core voltage-controlled oscillator

A method, comprising:

• providing a transformer structure of a dual core voltage controlled oscillator, the transformer structure having a geometry of a planar circle formed into a first half and a second half;
• providing a first core of a voltage controlled oscillator coupled with a first end of a first half of the transformer structure and a first end of the second half of the transformer structure;
• providing a second core of the voltage controlled oscillator coupled with a second end of the first half of the transformer structure and a second end of the second half of the transformer structure to reduce an effective inductance of the dual core voltage controlled oscillator by a first threshold while maintaining impedance within a second threshold;
• generating, by the first core, a first signal;
• generating, by the second core, a second signal;
• and
• magnetically coupling the first half of the transformer structure with the second half of the transformer structure to synchronize the first signal with the second signal at the effective inductance and the impedance.

A phase locked loop, comprising:

• a transformer structure of a voltage control oscillator of the phase locked loop, the transformer structure having a geometry of a planar circle formed into a first half and a second half;
• a first core of the voltage controlled oscillator comprising at least a first pair of transistors, the first core coupled with a first end of a first half of the transformer structure and a first end of the second half of the transformer structure;
• a second core of the voltage controlled oscillator comprising at least a second pair of transistors, the second core coupled with a second end of the first half of the transformer structure and to a second end of the second half of the transformer structure;
• and
• wherein the first core is configured to generate a first signal using at least the first pair of transistors, the second core is configured to generate a second signal using at least the second pair of transistors and the first half of the transformer structure is configured to magnetically couple with a second half of the transformer structure to synchronize the first signal with the second signal at an effective inductance of the voltage controlled oscillator that is reduced by a first threshold while maintaining impedance within a second threshold.

A dual core voltage controlled oscillator comprising:

• a transformer structure having a geometry of a planar circle formed into a first half and a second half;
• a first core of a voltage controlled oscillator coupled with a first end of a first half of the transformer structure and a first end of the second half of the transformer structure;
• and
• a second core of the voltage controlled oscillator coupled with a second end of the first half of the transformer structure and to a second end of the second half of the transformer structure,
• wherein an effective inductance of the dual core VCO is reduced by a first threshold while maintaining impedance within a second threshold, and
• wherein the transformer structure comprises a plurality of geometrical structures, the plurality of geometrical structures including
• a first geometrical structure comprising the planar circle and a second geometrical structure coupled with the first geometrical structure, the second geometrical structure comprising a second planar circle concentric with the planar circle of the first geometrical structure, wherein the second planar circle has a diameter that is larger than a diameter of the planar circle of the first geometrical structure, and
• a third geometrical structure comprising a third planar circle concentric with the first planar circle and the second planar circle, the third planar circle having a diameter that is smaller than the diameter of the planar circle of the first geometrical structure.