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A Low Power V-Band CMOS Frequency Divider With Wide Locking Range and Accurate Quadrature Output Phases

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7 Author(s)
Qun Gu ; Univ. of California at Los Angeles, Los Angeles ; Xu, Z. ; Daquan Huang ; LaRocca, T.
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A new injection-locked frequency divider (ILFD) circuit topology, by combining the strengths of LC type ILFD (LC_ILFD) and ring oscillator type ILFD (RO_ILFD), is proposed to achieve high speed, low power, wide locking range and accurate quadrature output phases. The frequency-division criterion is analyzed and agrees well with simulation results. The phase-locking mechanism is also investigated with emphasis on its resilience to device and circuit mismatches. A prototype is implemented in TSMC 90 nm CMOS to validate the effective locking range of 7.4 GHz (53.4 to 60.8 GHz) with 0 dBm input signal and 5 mW DC power dissipation. The circuit attains the highest figure-of-merit (dividing frequency/power) to date for V-band frequency dividers implemented in deep-scaled CMOS technologies.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:43 ,  Issue: 4 )

Date of Publication:

April 2008

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