Patent ID: 8665030

Claim:
A voltage-controlled oscillator (VCO) circuit comprising: a node; a first transistor; a second transistor; a first resonator circuit; a second resonator circuit; a first current source coupled between the first transistor and the node; and a second current source different from the first current source and coupled between the second transistor and the node, wherein a drain of the first transistor is coupled to a gate of the second transistor and to a first end of the first resonator circuit; a source of the first transistor is coupled to the first current source and to a first end of the second resonator circuit; a drain of the second transistor is coupled to a gate of the first transistor and to a second end of the first resonator circuit; a source of the second transistor is coupled to the second current source and to a second end of the second resonator circuit; and the second resonator circuit is coupled between the source of the first transistor and the source of the second transistor.