- 學位論文
應用於多頻段LC VCO之有系統的設計程序
Systematic Design Procedure of LC VCO for Multi-Band Application
摘要
本論文提出一應用於多頻段壓控振盪器(VCO)之有系統的設計程序，並以一個涵蓋WCDMA和Bluetooth頻段之可調頻率範圍的VCO為範例。此範例電路採用串聯電容和切換式電容陣列來分別達到降低振盪器「增益」 (Kvco) 與切換不同頻段的目的，並由設計程序中所提出的公式快速計算出所需的串聯電容及陣列電容值。依此設計程序所得之VCO核心部份在1.8V電源電壓供應下的消耗功率為6.3mW，在1.86GHz載波頻率下所量測得到之1MHz頻率偏移的相位雜訊為-123.3dBc/Hz與2.40GHz載波頻率下所量測得到之3MHz頻率偏移的相位雜訊為-125.6dBc/Hz。此LC VCO晶片採用UMC 0.18 RF CMOS 製程技術製造。
並列摘要
This thesis presents a systematic design procedure of voltage-controlled oscillator (VCO) for multi-band application. A VCO that provides the tuning range covering WCDMA and Bluetooth applications is proposed as the demonstration example. Serial capacitors and switching capacitor-arrays have been adopted in the example circuit for the purpose of reducing “Kvco” and switching different frequency bands, respectively. The required values of serial capacitors and capacitor-arrays can be directly calculated according to the equations in the design procedure. The power consumption of VCO core is 6.3 mW through a 1.8V supply. The measured phase noise is –123.3dBc/Hz at 1MHz offset from the carrier frequency of 1.86GHz and –125.6dBc/Hz at 3MHz offset from the carrier frequency of 2.40GHz, respectively. The fully integrated LC VCO was fabricated in UMC 0.18 RF CMOS technology process.