Dual-band quadrature voltage-controlled oscillator using differential inner-diamond-structure switchable inductor

A dual-band quadrature voltage-controlled oscillator (QVCO) with high figure-of-merits (FOMs) and cost-area efficiency is presented by integrating with differential inner-diamond-structure switchable inductors which have improved performances. This proposed QVCO is fabricated in a 0.18-μm complementary metal-oxide semiconductor process with an active-region area of 0.61 mm2. The QVCO core totally consumes 6.8 mA from 1.8 V supply voltage. The frequency tuning ranges are 120 MHz (from 3.18 to 3.3 GHz) for the low-band and 500 MHz (from 6.94 to 7.44 GHz) for the high-band, while the tuning voltage rises from 0 to 1.8 V. The best phase noises with an offset frequency of 1 MHz from the oscillation frequency in the low- and high-bands are −121.9 and −117.5 dBc/Hz, respectively. The measured phase errors in both high-band and low-band are less than 1°. The calculated FOMs, no matter the switch is off or on, are better than −180 dBc/Hz.

[1]  Howard C. Luong,et al.  Analysis and Design of Transformer-Based Dual-Band VCO for Software-Defined Radios , 2012, IEEE Transactions on Circuits and Systems I: Regular Papers.

[2]  Heng-Ming Hsu,et al.  Coupling Effect of On-Chip Inductor With Variable Metal Width , 2007, IEEE Microwave and Wireless Components Letters.

[3]  On-chip spiral inductors with patterned ground shields for Si-based RF ICs , 1998 .

[4]  Mona Mostafa Hella,et al.  A 1.94 to 2.55 GHz, 3.6 to 4.77 GHz Tunable CMOS VCO Based on Double-Tuned, Double-Driven Coupled Resonators , 2009, IEEE Journal of Solid-State Circuits.

[5]  Sang-Gyu Park,et al.  Fully integrated dual-band transceiver for IEEE 802.11a/b/g/j/n wireless local area network applications with hybrid up/down conversion architecture , 2011, IET Circuits Devices Syst..

[6]  Hyung-Joun Yoo,et al.  A Dual Band CMOS Quadrature VCO for Low Power and Low Phase Noise Application , 2007, 2007 IEEE International Workshop on Radio-Frequency Integration Technology.

[7]  K. O. Kenneth,et al.  A low-phase-noise and low-power multiband CMOS voltage-controlled oscillator , 2005 .

[8]  Kiat Seng Yeo,et al.  New wideband/dualband CMOS LC voltage-controlled oscillator , 2003 .

[9]  Tzuen-Hsi Huang,et al.  Integrated switchable inductors with symmetric differential layout , 2006, 2006 Asia-Pacific Microwave Conference.

[10]  Yu-Ting Chen,et al.  Novel symmetric-structure switchable differential inductor design , 2009, 2009 Asia Pacific Microwave Conference.

[11]  Egidio Ragonese,et al.  Radio-frequency front-end for 5 GHz wireless local area network transceivers , 2008, IET Circuits Devices Syst..

[12]  Babak Vakili-Amini,et al.  A Dual-Band CMOS MIMO Radio SoC for IEEE 802.11n Wireless LAN , 2008, 2008 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[13]  N. M. Ibrahim,et al.  Analysis of current crowding effects in multiturn spiral inductors , 2001 .