Miniaturized VCOs arm configurable synthesizers

Abstract

This paper describes the theoretical analysis and experimental verification of voltage controlled oscillator (VCO) that overcomes the past attempts to combine wideband VCO and Phase-Locked-Loop (PLL) in one small package (0.6×0.6 inches) for configurable frequency synthesizer operations. Shrinking the size of planar resonator s has led to miniatur ized (0.3×0.3 inches) wideband VCOs that are the building blocks for tiny, high-per formance, PLL-based frequency synthesizers. The typical measured phase noise @ 10 kHz offset for 4950–5500 MHz synthesizer is −90 dBc/Hz with 5V, 30 mA and settling time is less than 1msec, and not limited to this frequency, and be extended from 100 MHz to 12 GHz.