A current reused CMOS quadrature injection-locked frequency divider

作者：Chuang Yun Hsueh; Jang Sheng Lyang; Lee Shao Hwa; Chiang Yeuh Hua

来源：Microwave and Optical Technology Letters, 2007, 49(8): 1804-1806.

DOI：10.1002/mop.22604

• CMOS
• quadrature
• injection-locked frequency divider
• current reuse

A new current-reused injection-locked frequency divider is proposed to generate quadrature outputs and implemented using the standard UMC 0.18 mu m CMOS 1P6M process. The proposed circuit is made of two LC-tank voltage controlled oscillators (VCOs) stacked in series and the VCOs are coupled with the coupling transistors to generate quadrature signals. The direct injection-locked technique is applied to the VCO to perform a divide by two functions, so that the quadrature circuit can provide low phase noise signal. At the 1.8 V supply voltage, the free running frequency of proposed circuit operates from 2.3 to 2.63 GHz and provides 1 GHz locking from 4.43 to 5.43 GHz. The power consumption is 7.4 mW with 4.1 mA current consumption.

• 出版日期2007-8