Design of a 4 GHz Quadrature LC -VCO with Transformer Coupling

摘要：

A 4 GHz quadrature voltage-controlled oscillator(QVCO) topology is proposed where a planar spiral transformer is used as coupling terminals. Two identical LC oscillators are cross-coupled by the transformer to generate the quadrature outputs. The transformer also serves as filtering network for the oscillators to improve the phase noise performance. The quadrature oscillator based on the proposed topology with additional design ideas has been implemented in a 0,18 um mixed-signal 1P6M CMOS technology for 4 GHz-band operation. The simulation gaveA phase noise of-122dBc/Hz at 1 MHz of fset with an output power of ldBm,while dissipating 7.8 mA under a 1.8 V supply.

作者: Wu xiushan Wang zhigong Li zhiqun Li qing

作者单位: College of Electrical & Mechanical Engineering of China Jiliang University,310018 Hangzhou,China Ins Institute of RF-&OE-ICs,Southeast University,210096 Nanjing,China College of Electrical & Mechanical Engineering of China Jiliang University,310018 Hangzhou,China

会议类型: 国际会议

会议名称: 2008 International Conference on Microwave and Millimeter Wave Technology(2008国际微波毫米波技术会议)

会议地点: 南京

会议语种:英文

页码: 855-858

在线出版日期: 2008-04-21（万方平台首次上网日期，不代表论文的发表时间）