A Comparative Analysis of the CC and CE Type Buffers in Differential LC VCOs for Phase Noise

摘要：

In this paper, the fully integrated differential LC voltage controlled oscillator (VCO) is designed and fabricated in InGaP/GaAs HBT technology. The VCOs have the different two output buffer structures for low phase noise. To optimize buffers, two oscillators are compared. One is a common-collector buffer VCO (C-VCO), and the other one is a common-emitter buffer VCO (E-VCO). The C-VCO has better phase noise performance than the E-VCO according to the simulation results. In addition, the measurement result of the fabricated C-VCO is as follows. The tuning range is from 1.44 GHz to 1.709 GHz and -13.46 dBm of the output power at 1.708 GHz with balun and cable losses. Furthermore, the phase noise is -110.5 dBc/Hz at 100 kHz and -127.64 dBc/Hz at 1 MHz offset frequencies, respectively. It is fabricated with a die size of 0.85 × 0.9 mm2.

作者: Cong Wang De-Zhong Li Ram Krishna Maharjan Sung-Jin Cho Bhanu Shrestha Gear Inpyo Kyung Nam-Young Kim

作者单位: RFIC Center, Kwangwoon University, Seoul, 139-701, Korea

会议类型: 国际会议

会议名称: 2009 3rd IEEE International Symposium on Microwave,Antenna,Progagation and EMC Technologies for Wireless Communications(第三届微波、天线、电波传播和EMC技术国际会议

会议地点: 北京

会议语种:英文

页码: 184-187

在线出版日期: 2009-10-27（万方平台首次上网日期，不代表论文的发表时间）