A fully integrated silicon-germanium X-Band VCO

The design and realisation of a fully integrated Silicon Germanium (SiGe) X-Band Voltage Controlled Oscillator (VCO) is presented. It performs low phase noise and 10% tuning bandwidth at low voltage bias supply. The VCO, comprising integrated inductors and output transformers, is implemented in a SiGe technology which is suitable for high volume production. The features of this VCO, the adopted methodology and the herein proven potential of the technology make this work a good starting point for the design of next generation totally integrated fast PLL’s. The paper will describe also the architectures chosen and the design techniques adopted

Avaliação da vegetação existente nos pátios das escolas públicas municipais de Porto Alegre

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