A 4.8mW inductorless CMOS frequency divider-by-4 with more than 60% fractional bandwidth up to 70GHz

Frequency synthesizers at mm-waves would benefit from wide-band low-power dividers with large division factors. This work proposes a divider-by-4 based on clocked differential amplifiers working as dynamic CML latches. The clock modulates both the tail current and the load resistance of the differential pair, allowing a wide locking range. Prototypes, realized in 32nm CMOS, operate between 14GHz and 70GHz demonstrating a fractional bandwidth in excess of 60% in the entire range, 4.8mW of maximum power consumption and 55×18μm2 occupied area.

[1]  Yu-Ling Lin,et al.  A V-band divide-by-three differential direct injection-locked frequency divider in 65-nm CMOS , 2010, IEEE Custom Integrated Circuits Conference 2010.

[2]  Hen-Wai Tsao,et al.  Design and Analysis of CMOS Frequency Dividers With Wide Input Locking Ranges , 2009, IEEE Transactions on Microwave Theory and Techniques.

[3]  Enrico Monaco,et al.  A Low-Noise Quadrature VCO Based on Magnetically Coupled Resonators and a Wideband Frequency Divider at Millimeter Waves , 2011, IEEE Journal of Solid-State Circuits.

[4]  Y.-J.E. Chen,et al.  A 0.8-mW 55-GHz Dual-Injection-Locked CMOS Frequency Divider , 2008, IEEE Transactions on Microwave Theory and Techniques.

[5]  Enrico Monaco,et al.  A 6.5mW inductorless CMOS frequency divider-by-4 operating up to 70GHz , 2011, 2011 IEEE International Solid-State Circuits Conference.

[6]  Tang-Nian Luo,et al.  A V-Band Divide-by-Four Frequency Divider With Wide Locking Range and Quadrature Outputs , 2012, IEEE Microwave and Wireless Components Letters.

[7]  A. van Roermund,et al.  A 3 mW 54.6 GHz Divide-by-3 Injection Locked Frequency Divider With Resistive Harmonic Enhancement , 2009, IEEE Microwave and Wireless Components Letters.

[8]  M. Fujishima,et al.  70GHz CMOS Harmonic Injection-Locked Divider , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[9]  Ulrich Langmann,et al.  A 90GHz 65nm CMOS Injection-Locked Frequency Divider , 2007, 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.