DocumentCode :
1318749
Title :
A DC-to-1 GHz Tunable RF 
ADC Achieving DR 
74 dB and BW
Author :
Shibata, Hajime ; Schreier, Richard ; Yang, Wenhua ; Shaikh, Ali ; Paterson, Donald ; Caldwell, Trevor C. ; Alldred, David ; Lai, Ping Wing
Author_Institution :
Analog Devices Canada, Toronto, ON, Canada
Volume :
47
Issue :
12
fYear :
2012
Firstpage :
2888
Lastpage :
2897
Abstract :
A sixth-order dc-to-1 GHz tunable continuous-time lowpass/bandpass ΔΣ ADC in 65-nm CMOS targeting RF and IF digitizing applications is presented. The ADC achieves 150-MHz bandwidth at 450-MHz center frequency with 74-dB dynamic range at 4-GHz sampling frequency while consuming 550 mW. This performance is enabled by a reconfigurable LC and active-RC modulator structure, fifth-order and seventh-order feedforward operational amplifiers, a self-cut-off comparator, and a dual-supply DAC.
Keywords :
CMOS analogue integrated circuits; analogue-digital conversion; band-pass filters; circuit tuning; digital-analogue conversion; feedforward amplifiers; low-pass filters; operational amplifiers; CMOS; IF digitizing application; RF digitizing application; active-RC modulator structure; bandwidth 150 MHz; bandwidth 450 MHz; dual-supply DAC; fifth-order feedforward operational amplifier; frequency 1 GHz; frequency 4 GHz; power 550 mW; reconfigurable LC modulator structure; self-cut-off comparator; seventh-order feedforward operational amplifier; sixth-order DC; size 65 nm; tunable RF ΔΣ ADC; tunable continuous-time lowpass/bandpass ΔΣ ADC; Bandwidth; Gain; MOS devices; Noise measurement; Power demand; Resistors; Resonant frequency; Bandpass ADC; IF sampling; RF sampling; continuous-time; delta-sigma ADC; feed-forward operational amplifier; software radio;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2012.2217860
Filename :
6331570
Link To Document :
