Browsing by Author "Tarng, Shih-Hao"

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A 10 GHz low power CMOS quadrature voltage-controlled oscillator
(2005)
Tarng, Shih-Hao
;
Jou, Christina F.
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電信工程研究所
;
Institute of Communications Engineering
A 10 GHz low power CMOS quadrature voltage-controlled oscillator (QVCO) realized with LC-tank is presented. The QVCO is fabricated by TSMC 0.18 mu m 1P6M CMOS process. Based on the simulation results, this circuit draws 7.52 mA current from 1.8 V power supply. The total power consumption is 13.54 mW including the buffer. The tuning range is 730 MHz (about 7.3%) and the phase noise is - 103.44 dBc/Hz @ 1 MHz offset at 10 GHz. Compared with the recent proposed works by using the power-frequency-normalized figure of merit (FOM), it shows a better phase noise performance and lower power consumption..
A signal generator for MB-OFDM UWB system in 0.18 mu m CMOS process
(2007)
Tarng, Shih-Hao
;
Tsai, Yu-Ching
;
Shen, Yi-Shing
;
Jou, Christina F.
;
交大名義發表
A signal generator for Band Group 1, 3, and 4 in MB-OFDM UWB system is demonstrated in 0.18 mu m RF CMOS 1P6M process. It composes of a low phase noise and wide tuning range voltage-controlled oscillator (6.12 similar to 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 36.63mW. 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.