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A $V$ -Band Wide Locking Range Divide-by-4 Injection-Locked Frequency Divider
A novel $V$ -band divide-by-4 injection-locked frequency divider (ILFD) topology involving an injection loop and an output loop coupled by a two-port LC-tank has been proposed. With the specially designed… Click to show full abstract
A novel $V$ -band divide-by-4 injection-locked frequency divider (ILFD) topology involving an injection loop and an output loop coupled by a two-port LC-tank has been proposed. With the specially designed LC-tank, the third-order harmonic component can be enhanced in the injection loop, so that the mixing using the second-order nonlinearity can be used to realize divide-by-4, and thus, the locking range can be improved. Simultaneously, the output loop excites the oscillation at the fundamental frequency and suppresses the third-order harmonic components, facilitating a stable oscillation at the fundamental frequency and avoiding the effects of third-order harmonic on the following stages. Fabricated in a 65-nm CMOS technology, the proposed ILFD demonstrates a wide locking range of 60.2–69.9 GHz (14.9%) while consumes 4.8 mW from a 0.75-V supply.
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