A 1-V, 6.72-mW, 5.8-GHz CMOS Injection-Locked Quadrature Local Oscillator with Stacked Transformer Feedback VCO

作者：Huang Tzuen Hsi^*; Tseng Yuan Ru; Wu Shang Hsun

来源：IEICE - Transactions on Electronics, 2010, E93C(4): 505-513.

DOI：10.1587/transele.E93.C.505

• frequency divider
• injection-locked divider
• quadrature local oscillator
• stacked transformer
• transformer feedback
• VCO

This paper presents a teal integration of a 5 8-GHz. injection-locked quadrature local oscillator that includes two LC-tuned injection-locked frequency dividers (ILFDs) and a wide-tuning stacked-transformer feedback voltage-controlled oscillator (VCO) operated in double frequency A symmetric differential stacked-transformer with a high coupling factor and a MO quality factor is used as a feedback component for the wide-tuning VCO design The wide tuning range, which is greater than three time the desired bandwidth, is achieved by selecting a greater tuning capacitance ratio available flow high-voltage N-type accumulation-mode MOS varactors and a smaller self-inductance stacked-transformer Since the quality factors of the LC-resonator components can sustain at a high enough level, the wide-tuning VCO does not stiffer from the phase noise degradation too much In addition, the amine range of the local oscillator is extended simultaneously by utilizing switched capacitor arrays (SCAs) in the ILFDs The circuit is implemented by TSMC's 0 18-mu m RF CM OS technology At a 1-V power supply. the whole integrated circuit dissipates 6 72 mW (4 05 mW for the VCO and 2 67 mW for the two ILFDs) The total tuning range frequency is about 500 MHz (from 5 54 GHz to 6 04 GHz) when the tuning voltage V-none ranges from 0 V to 1 8 V At around the output frequency of 5 77 GHz (at V-none = 0 5 V), the measured phase noise of this local oscillator is -119 4 dBc/Hz at a 1-MHZ offset frequency This work satisfies the specification requirement tor IEEE 802 1 la UNII-3 band application The corresponding figure-of-merit (FOM) calculated is 186 3 dB

• 出版日期2010-4