Novel VCO Architecture Using Series Above-IC FBAR and Parallel LC Resonance. - Kim B. Östman; Sami Sipilä; Ivan S. Uzunov; Nikolay T. Tchamov (IEEE J. Solid State Circuits, 2006)

Dual-Band LC VCO Architecture With a Fourth-Order Resonator. - Nikolay T. Tchamov; Svetozar S. Broussev; Ivan S. Uzunov; Kari K. Rantala (IEEE Trans. Circuits Syst. II Express Briefs, 2007)

Theoretical Model of Ungrounded Inductance Realized With Two Gyrators. - Ivan S. Uzunov (IEEE Trans. Circuits Syst. II Express Briefs, 2008)

Design Considerations in Tapped-Inductor Fourth-Order Dual-Band VCO. - Svetozar S. Broussev; Ivan S. Uzunov; Nikolay T. Tchamov (IEEE Trans. Circuits Syst. II Express Briefs, 2012)