互補金氧半正交相位壓控震盪器設計與誤差補償技術

Abstract

本論文主要討論正交相位壓控震盪器的相位誤差，提出共模的方式分析電路中的不匹配所造成的相位誤差，並設計一補償電路以減輕電路中的不匹配所造成的相位誤差。藉由共模相位誤差補償電路，相位誤差與鏡像拒斥比各改善了1.5度及4.7分貝。壓控震盪器的Verilog-A模型亦被建立。當以Verilog-A模型取代實際電路模擬時，時間可節省至1/300

This thesis discusses the phase error of QVCO. The phase error of QVCO due to mismatch is analyzed with common-mode model. Efficient compensation circuit is proposed to alleviate the common mode phase error of the QVCO. With the common-mode compensation circuit, the QVCO phase error and image rejection ratio (IRR) are improved about 1.5 degrees and 4.7dB for 2.63GHz carrier frequency, respectively. VCO Behavior model was also built in Verilog-A. Simulation time can be saved by replacing transistor-level circuit with behavioral model (300:1).