Title :
A fully integrated 4GHz continuous-time bandpass Delta-Sigma converter
Author :
Béraud-Sudreau, Q. ; Mariano, A. ; Dallet, D. ; Deval, Y. ; Begueret, J. -B
Author_Institution :
IMS Lab., Univ. of Bordeaux, Bordeaux, France
Abstract :
A fourth-order bandpass Delta-Sigma converter with integrated LC resonators is presented in this paper. It is based on a multi-feedback architecture with a multi-bit quantizer in the main modulator path. This architecture allows achieving high-order noise-shaping maintaining modulator stability. Two integrated LC resonators with active Q-enhancement circuits are used in order to improve the overall resonator quality factor. This data converter is designed in a 0.13 μm CMOS process from STMicroelectronics. It achieves a DR of 68 dB in 30 MHz bandwidth with a 4 GHz sampling frequency.
Keywords :
CMOS integrated circuits; Q-factor; delta-sigma modulation; field effect MMIC; microwave resonators; CMOS process; active Q-enhancement circuits; continuous-time bandpass delta-sigma converter; fourth-order bandpass delta-sigma converter; frequency 4 GHz; high-order noise-shaping; integrated LC resonators; modulator stability; multibit quantizer; multifeedback architecture; resonator quality factor; size 0.13 mum; CMOS integrated circuits; Radio frequency; A/D Conversion; Continuous-Time Bandpass Delta-Sigma Modulator; High-IF Sampling LC resonator; Software Defined Radio;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-8155-2
DOI :
10.1109/ICECS.2010.5724628
