Title :
A Signal Generator for MB-OFDM UWB System in 0.18 μm CMOS Process
Author :
Tarng, Shih-Hao ; Tsai, Yu-Ching ; Shen, Yi-Shing ; Jou, Christina F.
Author_Institution :
Nat. Chiao-Tung Univ., Hsinchu
Abstract :
A signal generator for band group 1, 3, and 4 in MB-OFDM UWB system is demonstrated in 0.18 μm RF CMOS 1P6M process. It composes of a low phase noise and wide tuning range voltage-controlled oscillator (6.12˜9.15 GHz) by using a modified switched-capacitor-array. This generator also includes a frequency divider and a multiplexer. Based on the measurement, the circuit consumes 36.63 mW. The best measured phase noise is -115 dBc/Hz at 1 MHz offset, and the output power is -1 dBm. Compared with the recent published papers by using FOM, this work shows good noise performance and low power dissipation.
Keywords :
CMOS integrated circuits; OFDM modulation; frequency dividers; microwave oscillators; multiplexing equipment; phase noise; radiofrequency integrated circuits; signal generators; switched capacitor networks; ultra wideband communication; voltage-controlled oscillators; CMOS process; MB-OFDM UWB system; frequency 1 MHz; frequency 6.12 GHz to 9.15 GHz; frequency divider; modified switched-capacitor-array; multiplexer; phase noise; power 36.63 mW; signal generator; size 0.18 μm; voltage-controlled oscillator; CMOS process; Circuit optimization; Multiplexing; Noise measurement; Phase noise; Power measurement; Radio frequency; Signal generators; Tuning; Voltage-controlled oscillators; MB-OFDM UWB; VCO; frequency divider; multiplexer;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0687-0
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380352
