Title :
A prototype 210-MHz sub-sampling bandpass sigma-delta modulator
Author :
Su, Zhenjiang ; Xu, Yong Ping ; Rana, Ram Singh
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
A prototype 210-MHz CMOS sub-sampling bandpass sigma-delta modulator is presented. The modulator consists of a sub-sampling stage and a fourth-order switch-capacitor bandpass sigma-delta modulator. The chip is fabricated in a 0.6-μm CMOS process. The test result has shown that when sampled at 40MHz, the modulator has a dynamic range of 42 dB over 200-kHz bandwidth centered at 10MHz and a maximum SNR of 30dB.
Keywords :
CMOS integrated circuits; VHF filters; band-pass filters; sigma-delta modulation; switched capacitor filters; 0.6 micron; 200 kHz; 210 MHz; 40 MHz; CMOS process; bandpass sigma-delta modulator; dynamic range; fourth order switched capacitor circuit; Bandwidth; Clocks; Delta-sigma modulation; Digital modulation; Frequency; Image sampling; Prototypes; Sampling methods; Signal generators; Signal sampling; IF sampling; bandpass; sigma-delta modulator; sub-sampling;
Conference_Titel :
Circuits and Systems, 2003 IEEE 46th Midwest Symposium on
Print_ISBN :
0-7803-8294-3
DOI :
10.1109/MWSCAS.2003.1562246
