A 0.9-to 8-GHz VCO With a Differential Active Inductor for Multistandard Wireline SerDes

作者：Cheng Kuo Hsing^*; Hung Cheng Liang; Gong Cihun Siyong Alex; Liu Jen Chieh; Jiang Bo Qian; Sun Shi Yang

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2014, 61(8): 559-563.

DOI：10.1109/TCSII.2014.2327451

• Differential active inductor
• voltage-controlled oscillator (VCO)
• wideband
• wireline SerDes interfaces

This study demonstrates a wide frequency tuning range LC voltage-controlled oscillator (LC-VCO) with an active inductor in a 90-nm CMOS process. As the proposed LC-VCO is intended to be extremely flexible without redesign for several new-generation SerDes interfaces, a wide operating frequency makes the phase-locked loop (PLL) applicable to the multistandards. To demonstrate a highly competitive design, a quality (Q) factor enhancement technique has been also demonstrated to reduce the loss from the active inductor, leading to an appropriate phase noise over the entire tuning range. At a supply of 1.2 V, the fabricated LC-VCO provides a frequency tuning range of 0.9-8 GHz (160%) with power consumption of 3.2-19.1 mW. The measured phase noise is from -105 to -118 dBc/Hz at a 1-MHz offset. Realized in a fully integrated PLL chip, it occupies an active area of 0.08 x 0.16 mm(2).

• 出版日期2014-8
• 单位长春大学; 中央民族大学