Title :
A quadrature bandpass continuous-time delta-sigma modulator for tri-mode GSM-EDGE/UMTS/DVB-T receivers, with power scaling technique
Author :
Ho, Chen-Yen ; Chan, Wei-Shan ; Lin, Yung-Yu ; Lin, Tsung-Hsien
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A second-order multi-bit quadrature bandpass continuous-time delta-sigma modulator (QBP-CTDSM) employing a power scaling technique (PST) is reported in this paper for GSM-EDGE/UMTS/DVB-T receivers. This modulator employs operational amplifiers with PST to optimize power consumption among the tri-mode operation. The QBP-CTDSM is fabricated in a 0.18-μm CMOS process. It achieves 81/61.2/60.9 dB SNDR across 270-kHz/5-MHz/8-MHz bandwidth with a programmable center frequency spanning from 500 kHz to 12 MHz. Measured from a 1.8-V supply voltage, the power consumptions are 4.9/8.9/12.1 mW for GSM-EDGE/UMTS/DVB-T modes, respectively, which results in FOMs of 0.99/0.95/0.84 pJ/conversion.
Keywords :
3G mobile communication; cellular radio; delta-sigma modulation; digital video broadcasting; operational amplifiers; receivers; bandwidth 270 kHz; bandwidth 5 MHz; bandwidth 8 MHz; frequency 500 kHz to 12 MHz; operational amplifiers; power 12.1 mW; power 4.9 mW; power 8.9 mW; power scaling technique; quadrature bandpass continuous-time delta-sigma modulator; size 0.18 mum; tri-mode GSM-EDGE/UMTS/DVB-T receivers; voltage 1.8 V; 3G mobile communication; Band pass filters; Digital video broadcasting; Frequency modulation; Receivers; Switches;
Conference_Titel :
Solid State Circuits Conference (A-SSCC), 2010 IEEE Asian
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-8300-6
DOI :
10.1109/ASSCC.2010.5716576
