Abstract
A 124-GHz injection-locked quadrature voltage-controlled oscillator (ILQVCO) fabricated using a 40-nm CMOS process is presented. It locks onto a fundamental reference signal at 124 GHz generated on-chip from an external reference at 31 GHz, thereby avoiding generation of spurious noise commonly se en in the phase noise spectra of subharmonically injection-locked VCOs. The QVCO's phase noise levels in the free-running and injection-locked conditions are -87 dBc/Hz and -117 dBc/Hz, respectively, at 1-MHz offset. The high fundamental oscillation frequency and the low phase noise are realized by adopting a ring-type topology and transformers for inter-stage impedance matching. The ILQVCO is combined with an on-chip double-balanced quadrature modulator for vector signal generation. A 32QAM signal thus generated achieved a data rate of 25 Gb/s with an error-vector magnitude (EVM) of 5.1%.
Original language | English |
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Title of host publication | 2015 IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Proceedings |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781467371919 |
DOIs | |
Publication status | Published - 2016 Jan 19 |
Externally published | Yes |
Event | 11th IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Xiamen, Fujian, China Duration: 2015 Nov 9 → 2015 Nov 11 |
Other
Other | 11th IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 |
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Country | China |
City | Xiamen, Fujian |
Period | 15/11/9 → 15/11/11 |
Keywords
- CMOS
- injection locking
- millimeter wave
- phase modulation
- QVCO
ASJC Scopus subject areas
- Electrical and Electronic Engineering