Title: A 120 GHz QVCO with 16.2 GHz tuning range resistent against VCO pulling in 45 nm CMOS
Authors: Volkaerts, Wouter ×
Steyaert, Michiel
Reynaert, Patrick #
Issue Date: 18-Dec-2014
Publisher: Springer Netherlands
Series Title: Analog Integrated Circuits and Signal Processing vol:x issue:x pages:1-10
Abstract: Frequency pulling of an oscillator integrated in a quadrature phase-shift keying wireless transmitter degrades the performance of the wireless system. This paper analyses the behavior of an oscillator in the presence of coupling between the oscillator and a power amplifier or antenna. Symbol switching in the modulator will cause frequency shifts in the oscillator at the modulation frequency. A new architecture for a 120 GHz quadrature frequency generator with large tuning range and immunity against PA–VCO coupling is presented. Combining the output signals of two independent oscillators, the pulling effect is removed and the frequency generator can be integrated with a PA and an antenna on the same chip. This architecture also makes quadrature generation with large tuning range feasible at 120 GHz. The chip is fabricated in a 45 nm CMOS technology and shows a tuning range of 16.2 GHz (13.5 %), a phase noise of À112 dBc/Hz @ 10 MHz offset and a phase error of 5° (Volkaerts et al. in: IEEE Radio Frequency Integrated Circuits Symposium (RFIC), 2013).
ISSN: 0925-1030
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - MICAS, Microelectronics and Sensors
× corresponding author
# (joint) last author

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