Title :
An integrated sigma-delta noise-shaped buck converter
Author :
Chang, Wei-Hsun ; Jen, Yung-Hsin ; Tsai, Chien-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
An integrated sigma-delta noise-shaped buck converter that uses a discrete-time second order single-bit sigma-delta modulator (DT-SDM2) is presented. The DT-SDM2 buck converter and a compared PWM controller are designed and fabricated on a standard TSMC 0.35 ¿m 3.3 V CMOS process. The operating frequency of the proposed DT-SDM2 ranges from 400 KHz to 1.2 MHz. Simulation results show that DT-SDM2 has better noise performance than those of PWM and continuous-time SDM2 (CT-SDM2) buck converters.
Keywords :
CMOS integrated circuits; power convertors; sigma-delta modulation; DT-SDM2; PWM controller; TSMC CMOS process; discrete-time second order single-bit sigma-delta modulator; frequency 400 kHz to 1.2 MHz; integrated sigma-delta noise-shaped buck converter; size 0.35 mum; voltage 3.3 V; Buck converters; Circuit noise; Delta-sigma modulation; Driver circuits; Noise generators; Pulse width modulation; Pulse width modulation converters; Signal generators; Virtual colonoscopy; Voltage control; buck converter; component; noise-shaped; sigma-delta;
Conference_Titel :
Power Electronics and Drive Systems, 2009. PEDS 2009. International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4166-2
Electronic_ISBN :
978-1-4244-4167-9
DOI :
10.1109/PEDS.2009.5385777
