Abstract
A triple-band and wide operation range divide-by-2 injection-locked frequency divider (ILFD) using a TSMC 0.18 μm 1P6 M CMOS technology is presented. The ÷2 ILFD circuit is realized with a cross-coupled n-core MOS LC-tank oscillator with a 6th order LC resonator constructed from three single-resonance parallel LC resonators. The core power consumption of the ILFD core is 11.6 mW at the supply voltage of 1 V. The free-running ILFD can operate at three frequency bands: 8.75, 5.79 and 3.7 GHz, and the ILFD operation range covers a high-band frequency range from 17.1 to 18.3 GHz, a middle-band from 10.1 to 12.7 GHz, and a low-band from 6.0 to 7.7 GHz. The band selection is obtained by tuning the varactor's control bias.
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