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A 20-GHz Differential Push-Push VCO for 60-GHz Frequency Synthesizer toward 256 QAM Wireless Transmission in 65-nm CMOS
Yun WANG Makihiko KATSURAGI Kenichi OKADA Akira MATSUZAWA
IEICE TRANSACTIONS on Electronics
Publication Date: 2017/06/01
Online ISSN: 1745-1353
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Their Application Technologies)
CMOS, push-push VCO, injection locking oscillator, low phase noise, 256 QAM transceiver,
Full Text: FreePDF(1.5MB)
This paper present a 20-GHz differential push-push voltage controlled oscillator (VCO) for 60-GHz frequency synthesizer. The 20-GHz VCO consists of a 10-GHz in-phase injection-coupled QVCO (IPIC-QVCO) with tail-filter and a differential output push-push doubler for 20-GHz output. The VCO fabricated in 65-nm CMOS technology, it achieves tuning range of 3 GHz from 17.5 GHz to 20.4 GHz with a phase noise of -113.8 dBc/Hz at 1 MHz offset. The core oscillator consumes up to 71 mW power and a FoM of -180.2 dBc/Hz is achieved.