Title :
A 3.1–10.6GHz frequency synthesizer for MB-OFDM UWB transceivers
Author :
Zhang, Hong ; Niu, Yangyang ; Tang, Shengdong ; Zhang, Ruizhi ; Chen, Guican
Author_Institution :
Dept. of Microelectron., Xi´´an Jiaotong Univ., Xi´´an, China
Abstract :
A frequency synthesizer capable of generating all the 14 sub-band carrier frequencies in 3.1~10.6 GHz band for multiband OFDM ultra-wideband (MB-OFDM UWB) transceivers is proposed. It is composed of a phase-locked loop (PLL), two singlesideband (SSB) mixers, and two multiplexers (MUXs). Switched-cascode architecture with switched LC tanks is adopted in the multiplexers to ensure fast switching. A buffer with series peaking is employed for the output SSB mixer to enlarge its bandwidth. The synthesizer is designed in TSMC 0.18 μm CMOS technology. The simulated switching time between each sub-band is approximately 3ns. The current consumption excluding that of the PLL is 25 mA under 1.8V power supply.
Keywords :
CMOS integrated circuits; OFDM modulation; frequency synthesizers; mixers (circuits); phase locked loops; transceivers; ultra wideband communication; CMOS technology; MB-OFDM UWB transceiver; SSB mixer; TSMC; current 25 mA; current consumption; frequency 3.1 GHz to 10.6 GHz; frequency synthesizer; multiband OFDM ultra wideband transceiver; phase locked loop; series peaking; single sideband mixers; subband carrier frequency; switched LC tank; switched cascode architecture; voltage 1.8 V; Amplitude modulation; Bandwidth; Frequency synthesizers; Mixers; Multiplexing; Phase locked loops; Switches;
Conference_Titel :
Signals Systems and Electronics (ISSSE), 2010 International Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6352-7
DOI :
10.1109/ISSSE.2010.5607133
