The paper addresses the design and realization of a quadracture voltage-controlled oscillator (QVCO) and a frequency doubling regenerator. Operating from a 0.5-V supply, the proposed circuits provide the tuning range of 8.8 to 9.2 GHz and dissipate below 7.2 mW. At 9.1-GHz carried frequency with doubling-frequency operation, the measured phase noise is-107 dBc/Hz at a 1-MHz offset. Simultaneously, the fundamental frequency output by the QVCO provides the phase noise of-124 dBc/Hz at a 1-MHz offset.