A Compact and Low Power 5-10 GHz Quadrature Local Oscillator for Cognitive Radio Applications

作者：Lu Jianhua^*; Wang Ning Yi; Chang Mau Chung Frank

来源：IEEE Journal of Solid-State Circuits, 2012, 47(5): 1131-1140.

DOI：10.1109/JSSC.2012.2185573

• CMOS
• cognitive radio
• frequency extension
• injection-locked ring oscillator
• LC-VCO
• quadrature phase local oscillator

This paper presents the design and implementation of a compact and low power quadrature local oscillator (LO) for creating 13.3-20 GHz signal initially from a differentially tuned LC-VCO and then converting it to the desired 5-10 GHz with continuous frequency coverage. To accomplish such purpose, a 4-stage differential injection-locked ring oscillator (ILRO) is used subsequently to the latch-based divider to generate quadrature output phases without restricting 50% duty cycle from input signals as those of conventional divide-by-2 approaches. When implemented in a 65 nm general purpose CMOS IC technology, the integrated quadrature-phased LO consumes 22 mA of current at a 1 V supply and is able to exhibit the worst-case phase noise of -104 dBc/Hz at 1 MHz offset across the entire 5-10 GHz band for intended cognitive radio applications.

• 出版日期2012-5