Title :
High-IF Sampling Continuous-Time Bandpass Δ Σ Modulator
Author :
Mariano, A.A. ; Dallet, D. ; Deval, Y. ; Begueret, J.-B.
Author_Institution :
Integrated Circuits Design Team, Bordeaux Univ.
Abstract :
A fourth-order integrated LC bandpass delta-sigma modulator is presented. It is designed in a 0.25 mum BiCMOS SiGe:C process from STMicroelectronics. The modulator can directly digitize high intermediate signals in a 20MHz bandwidth. It employs two integrated LC resonators with active Q-enhancement circuits. A multi-feedback architecture is used to achieve higher order noise-shaping, while maintaining the modulator stability. A multibit quantizer was implemented to reduce quantization noise and improve stability
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; band-pass filters; carbon; continuous time filters; integrated circuit design; integrated circuit noise; quantisation (signal); resonators; sigma-delta modulation; 0.25 micron; 20 MHz; BiCMOS process; SiGe:C; SigmaDelta modulator; active Q-enhancement circuits; continuous-time bandpass modulator; higher order noise-shaping; integrated LC resonators; multibit quantizer; multifeedback architecture; quantization noise; Bandwidth; BiCMOS integrated circuits; Circuit stability; Delta modulation; Digital modulation; Noise reduction; Noise shaping; Quantization; Sampling methods; Signal sampling;
Conference_Titel :
Research in Microelectronics and Electronics 2006, Ph. D.
Conference_Location :
Otranto
Print_ISBN :
1-4244-0157-7
DOI :
10.1109/RME.2006.1689913
