Title :
A bandpass sigma-delta for software low-power and low-voltage radio by using PATH technique
Author :
Wu, Yiu ; Ling, John ; Helms, Ward J.
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
This paper proposes a PArallel Two patH (PATH) technique for oversampled bandpass analog-to-digital converter in low-power and low-voltage environment to relax the settling requirement and to increase signal-to-noise ratio. The design considerations for the implementation are evaluated and strategies overcome the possible problems. It is clocked at 20 MHz and digitized a 200 kHz bandwidth signal centered at 1O MHz with 87 dB signal-to-noise ratio (SNR) while suppressing the undesired mirror image signal at 40 dB in 1.8-V supply voltage
Keywords :
low-power electronics; mobile radio; sigma-delta modulation; superheterodyne receivers; 1.8 V; 10 MHz; 20 MHz; 200 kHz; PATH technique; bandpass sigma-delta; low-power radio; low-voltage radio; oversampled bandpass analog-to-digital converter; parallel two path technique; settling requirement; signal-to-noise ratio; software-controlled radio; undesired mirror image signal suppression; Bandwidth; Clocks; Delta-sigma modulation; Mirrors; Operational amplifiers; Radio frequency; Receivers; Signal sampling; Signal to noise ratio; Voltage;
Conference_Titel :
VLSI, 1999. Proceedings. Ninth Great Lakes Symposium on
Conference_Location :
Ypsilanti, MI
Print_ISBN :
0-7695-0104-4
DOI :
10.1109/GLSV.1999.757409
