A 60-GHz Injection-Locked Frequency Divider Using Multi-Order LC Oscillator Topology for Wide Locking Range

Keita TAKATSU; Hirotaka TAMURA; Takuji YAMAMOTO; Yoshiyasu DOI; Koichi KANDA; Takayuki SHIBASAKI; Tadahiro KURODA

doi:10.1587/transele.E94.C.1049

Special Section on Analog Circuits and Related SoC Integration Technologies

A 60-GHz Injection-Locked Frequency Divider Using Multi-Order LC Oscillator Topology for Wide Locking Range

Keita TAKATSU, Hirotaka TAMURA, Takuji YAMAMOTO, Yoshiyasu DOI, Koichi KANDA, Takayuki SHIBASAKI, Tadahiro KURODA

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Keywords: ILFD, locking range, multi-order LC oscillator, 60-GHz, CMOS

JOURNAL RESTRICTED ACCESS

2011 Volume E94.C Issue 6 Pages 1049-1052

DOI https://doi.org/10.1587/transele.E94.C.1049

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Abstract

A 60-GHz injection-locked frequency divider (ILFD) is presented. A multi-order LC oscillator topology is proposed to enhance the locking range of the divider. A design guideline is described based on a theoretical analysis of the locking range enhancement. A test chip is fabricated in 65nm CMOS. Measured locking range with 0dBm input power is 48.5-62.9GHz (25.9%), which is 63.6% wider compared to the previously reported ILFD. Power consumption excluding buffers and biasing circuits is 1.65mW from 1.2V supply. The core ILFD area is 0.0157mm² even with an extra pair of inductors.

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