A 0.4–6-GHz Frequency Synthesizer Using Dual-Mode VCO for Software-Defined Radio

Jin Zhou, Wei Li, Deping Huang, Chen Lian, Ning Li, Junyan Ren, Jinghong Chen
2013 IEEE transactions on microwave theory and techniques  
This paper presents a dual-mode voltage-controlled oscillator (DMVCO) and a DMVCO-based wideband frequency synthesizer for software-defined radio applications. The DMVCO allows the synthesizer to leverage single-sideband (SSB) mixing, a power efficient approach, for high-frequency local oscillator (LO) signal generation, without the need of poly-phase filter or quadrature voltage-controlled oscillator (QVCO). When compared to the QVCO approach, the DMVCO solution allows the synthesizer to
more » ... ynthesizer to provide continuous LO signals without frequency gaps. The synthesizer is implemented in a 0.13m CMOS technology, occupying an active area of 2.2 mm and consuming 34-77 mW of power. It provides in-phase and quadrature-phase LO signals over the frequency bands of 0.4-3-and 5-6 GHz and differential LO signals from 0.4 to 6 GHz, supporting major wireless standards including DVB-T, GSM, WCDMA, TD-SCDMA, WLAN802.11 a/b/g, and Bluetooth. The measured phase noises are 135 and 124 dBc/Hz at 3-MHz offset under 1.8-and 5.15-GHz carriers, respectively. The measured spurious tones are less than 42 dBc at the SSB mixer output. Index Terms-Frequency synthesizer, phase noise, single-sideband (SSB) mixer, software-defined radio (SDR), voltage-controlled oscillator (VCO), wireless communication.
doi:10.1109/tmtt.2012.2233493 fatcat:romy6hhwizdotitoc5jmqpxyya